JP2019036198A - Information processing apparatus and image forming apparatus - Google Patents

Abstract

To provide an information processing apparatus and an image forming apparatus which can suppress increase of time required for memory training.SOLUTION: An information processing apparatus has a control apparatus, a main memory apparatus, and an auxiliary memory apparatus. The information processing apparatus has a detection apparatus. The detection apparatus detects a physical amount indicating a use environment of the information processing apparatus. The control apparatus has a determining unit and an executing unit. The determining unit determines an initial training condition. The executing unit executes memory training based on the initial training condition. The auxiliary memory apparatus has a first storage unit and a second storage unit. The first storage unit stores configuration information. The second storage unit stores a training record. The determining unit determines the initial training condition based on the latest configuration information, a physical amount indicating the latest use environment and the training record.SELECTED DRAWING: Figure 2

Description

  The present invention relates to an information processing apparatus and an image forming apparatus.

  When the configuration condition (memory module) indicating the configuration of the information processing apparatus does not change, the information processing apparatus described in Patent Document 1 determines a past training result stored in the auxiliary storage device as a training initial condition, and performs memory training. Execute.

Japanese Patent Laid-Open No. 2006-99788

  However, when the usage environment of the information processing apparatus changes, the allowable delay amount and / or the allowable level also changes. The allowable delay amount indicates a range of a delay amount in which the control device can receive a signal without error. The delay amount indicates a signal delay amount with reference to the clock. The allowable level indicates a reference voltage range in which the information indicated by the signal can be calculated without error. The reference voltage indicates a voltage used when the control device calculates information indicated by the signal. Therefore, when executing memory training and calculating the upper limit of the allowable delay amount, the lower limit of the allowable delay amount, the upper limit of the allowable level, and the lower limit of the allowable level, the initial training conditions are determined without reflecting the usage environment. This may increase the time required for memory training.

  An object of the present invention is to provide an information processing apparatus and an image forming apparatus that can suppress an increase in time required for memory training.

  According to one aspect of the present invention, an information processing apparatus includes a control device, a main storage device, and an auxiliary storage device. The information processing apparatus includes a detection device. The detection device detects a physical quantity indicating a use environment of the information processing device. The control device includes a determination unit and an execution unit. The determination unit determines initial training conditions. The execution unit executes memory training based on the training initial condition. The auxiliary storage device includes a first storage unit and a second storage unit. The first storage unit stores configuration information indicating a configuration of the information processing apparatus. The second storage unit stores a training record that is a record of a plurality of the memory trainings executed in the past. The training record includes a plurality of training information. Each of the plurality of training information corresponds to a plurality of memory training executed in the past. Each of a plurality of pieces of training information includes the configuration information when the memory training was executed in the past, the physical quantity indicating the use environment when the memory training was executed in the past, and the memory executed in the past. The information which matched the training result of training is shown. The determination unit determines the initial training condition based on the latest configuration information, the physical quantity indicating the latest use environment, and the training record. The latest configuration information indicates the configuration information when the latest memory training is executed. The physical quantity indicating the latest use environment is a physical quantity indicating the use environment when the latest memory training is executed.

  According to the present invention, an increase in time required for memory training can be suppressed.

1 is a schematic cross-sectional view of an image forming apparatus according to a first embodiment of the present invention. 1 is a block diagram illustrating an image forming apparatus. It is a figure which shows a training record. It is a 1st flowchart which shows operation | movement of a control apparatus. It is a flowchart which shows the determination process of training initial conditions. (A) is a 1st conceptual diagram which shows a 1st process and a 2nd process. (B) is a 2nd conceptual diagram which shows a 1st process and a 2nd process. (A) is a 1st conceptual diagram which shows a 3rd process and a 4th process. (B) is a 2nd conceptual diagram which shows a 3rd process and a 4th process. It is a 2nd flowchart which shows operation | movement of a control apparatus.

  Embodiments of the present invention will be described with reference to the drawings. In the drawings, the same or corresponding parts are denoted by the same reference numerals and description thereof is not repeated.

[First Embodiment]
A first embodiment of the image forming apparatus 100 will be described with reference to FIG. FIG. 1 is a schematic cross-sectional view of the image forming apparatus 100.

  As illustrated in FIG. 1, the image forming apparatus 100 includes a conveyance unit 1, a reading unit 2, an input unit 3, a housing 4, a cassette 5, a feeding roller 6, a conveyance roller 7, and image formation. A unit 8, a discharge roller 9, and an information processing device 10 are provided.

  The conveyance unit 1 conveys the sheet toward the reading unit 2. The reading unit 2 scans an image formed on the sheet and acquires image data indicating the image. The input unit 3 includes, for example, a display unit 3a and an operation key group 3b. The input unit 3 receives an instruction for the image forming apparatus 100. Further, the input unit 3 includes a device that receives an instruction for the information processing apparatus 10. The display unit 3a may be a touch panel. For example, when printing, the user inputs image quality and / or sheet size to the input unit 3 and sets printing conditions for the image forming apparatus 100. The display unit 3a displays various information. The display unit 3a may be a touch panel.

  The housing 4 has a hollow shape. A substantially closed space is formed in the interior 4 a of the housing 4. The housing 4 accommodates a cassette 5, a feeding roller 6, a transport roller 7, an image forming unit 8, a discharge roller 9, and an information processing device 10.

  The cassette 5 stores sheets. The feeding roller 6 sends out the sheets in the cassette 5. The conveyance roller 7 sends out the sheet conveyed from the feeding roller 6 toward the image forming unit 8.

  The image forming unit 8 forms an image on a sheet. Specifically, the image indicates a toner image. The image forming unit 8 includes a photosensitive drum, a charging unit, an exposure unit, a developing unit, a transfer unit, a cleaning unit, and a charge eliminating unit. An image is formed on the sheet by the photosensitive drum, the charging unit, the exposure unit, the development unit, and the transfer unit. The cleaning unit removes toner remaining on the surface of the photosensitive drum. The neutralization unit removes residual charges on the surface of the photosensitive drum. After forming an image on the sheet, the image forming unit 8 sends the sheet toward the fixing unit. The fixing unit heats and presses the image to fix it on the sheet.

  The discharge roller 9 discharges the sheet that has passed through the image forming unit 8 to the outside of the housing 4.

  Next, the information processing apparatus 10 will be described with reference to FIGS. 1 and 2. FIG. 2 is a block diagram illustrating the image forming apparatus 100.

  As illustrated in FIGS. 1 and 2, the information processing apparatus 10 includes a storage device 11, a control device 12, a power supply unit 13, a detection device 14, and a substrate 15.

  The storage device 11 includes a first storage device (for example, a semiconductor memory) such as a ROM (Read Only Memory) and a RAM (Random Access Memory), and may further include a second storage device (for example, a hard disk drive). .

  The storage device 11 includes a main storage device 21 and an auxiliary storage device 22.

  The main storage device 21 is composed of a semiconductor memory such as a RAM (Random Access Memory), for example. The main storage device 21 is provided on the substrate 15. In the first embodiment, one main storage device 21 is installed on the substrate 15. However, a plurality of main storage devices 21 may be installed on the substrate 15.

  The auxiliary storage device 22 is configured by a nonvolatile memory such as NVRAM (Non Volatile Memory), for example. The auxiliary storage device 22 is installed on the substrate 15. The auxiliary storage device 22 stores various programs executed by the control device 12. The auxiliary storage device 22 includes a first storage unit 23 and a second storage unit 26.

  The control device 12 includes processors such as a CPU (Central Processing Unit) and an MPU (Micro Processing Unit). The control device 12 controls each element of the image forming apparatus 100. The control device 12 controls each element of the information processing device 10. Specifically, the processor executes a computer program stored in the storage device 11 (specifically, the auxiliary storage device 22), thereby causing the transport unit 1, the reading unit 2, the input unit 3, and the feeding. The roller 6, the transport roller 7, the image forming unit 8, the discharge roller 9, the storage device 11, the power supply unit 13, and the detection device 14 are controlled.

  The control device 12 includes a first determination unit (determination unit) 12a, an execution unit 12b, a generation unit 12c, a second determination unit 12d, a control unit 12e, and a clock generation unit 12f. Specifically, the processor executes the computer program stored in the storage device 11 (specifically, the auxiliary storage device 22), whereby the first determination unit 12a, the execution unit 12b, the generation unit 12c, and the second determination It functions as the unit 12d and the control unit 12e. The clock generation unit 12f is a clock circuit that generates a clock (clock signal), and is controlled by a processor. The control device 12 is installed on the substrate 15.

  The power supply unit 13 includes a power supply circuit. The power supply unit 13 is installed on the substrate 15. The power supply unit 13 supplies a voltage to the control device 12. The control device 12 operates when supplied with a voltage. As a result, the information processing apparatus 10 operates.

  The detection device 14 detects a physical quantity indicating the usage environment of the information processing device 10. That is, the detection device 14 detects a physical quantity indicating the usage environment of the information processing device 10 when the memory training is executed. Memory training indicates that the control device 12 and the main storage device 21 are initialized. The usage environment of the information processing apparatus 10 indicates, for example, the state of the information processing apparatus 10 when the information processing apparatus 10 is operating and the environment around the information processing apparatus 10. In the first embodiment, the physical quantity indicating the usage environment of the information processing apparatus 10 indicates the supply voltage and the internal temperature. The supply voltage indicates a voltage supplied to the control device 12. Specifically, the supply voltage indicates a voltage supplied from the power supply unit 13 to the control device 12. The internal temperature indicates the temperature of the inside 4 a of the housing 4. The housing 4 accommodates the control device 12 and the main storage device 21.

  Specifically, the detection device 14 includes a first detection unit 14a and a second detection unit 14b.

  The first detection unit 14a detects the supply voltage. The first detection unit 14 a includes, for example, a voltage detection circuit and is built in the control device 12.

  The second detection unit 14b detects the internal temperature. The second detection unit 14 b is installed in the interior 4 a of the housing 4 and is accommodated in the housing 4. The second detection unit 14b includes, for example, a thermistor.

  Next, the first storage unit 23 and the second storage unit 26 will be described with reference to FIG.

  The first storage unit 23 indicates a certain area among the storage areas of the auxiliary storage device 22. The first storage unit 23 stores configuration information indicating the configuration of the information processing apparatus 10. The first storage unit 23 stores the latest configuration information. In the first embodiment, the configuration information includes first information, second information, third information, fourth information, and fifth information.

  The first information indicates the first output resistance when the control device 12 processes the signal. The signal is a voltage signal. The second information indicates the second output resistance when the main storage device 21 processes the signal. The third information indicates the first termination resistance when the control device 12 processes the signal. The fourth information indicates the second termination resistance when the main storage device 21 processes the signal.

  The fifth information indicates the type of the main storage device 21. The type of the main storage device 21 includes information indicating the configuration of the main storage device 21 such as the clock frequency of the main storage device 21. For example, when the main storage device 21 is mounted on the substrate 15, the fifth information is transmitted from the main storage device 21 to the control device 12. Then, the control device 12 stores the fifth information in the first storage unit 23.

  The second storage unit 26 indicates a certain area among the storage areas of the auxiliary storage device 22. The second storage unit 26 stores the training record 24.

  Next, the training record 24 will be described with reference to FIG. FIG. 3 is a diagram showing the training record 24.

  As shown in FIG. 3, the training record 24 is a record of a plurality of memory trainings executed in the past. Multiple memory training is performed at different times.

  The training record 24 includes a plurality of training information 25. In the first embodiment, the training record 24 includes first training information 251 to Nth training information 25N. N is a natural number. N is a constant. When the execution unit 12b executes the memory training once, one piece of training information 25 is generated. That is, the plurality of training information 25 respectively correspond to a plurality of memory training executed in the past.

  The training record 24 of the first embodiment includes N pieces of training information 25. Accordingly, the training record 24 of the first embodiment is a training record of N memory trainings.

  Each of the plurality of training information 25 includes past configuration information, a physical quantity indicating a past use environment, and a past training result. The past configuration information indicates configuration information when memory training has been executed in the past. The past use environment indicates a physical quantity indicating the use environment when memory training has been executed in the past. The past training result indicates a training result of memory training executed in the past. Specifically, the past configuration information indicates first information to fifth information when memory training has been executed in the past. Specifically, the physical quantity indicating the past use environment indicates the supply voltage when the memory training is executed in the past and the internal temperature when the memory training is executed in the past.

  Each of the plurality of training information 25 indicates information in which past configuration information, a physical quantity indicating a past use environment, and a past training result are associated with each other.

  The training result indicates a predetermined value calculated by executing the memory training by the execution unit 12b. The execution unit 12b calculates a training result every time memory training is executed. The training result is affected by the configuration information and the physical quantity indicating the use environment. Accordingly, each of the plurality of training information 25 associates past configuration information, a physical quantity indicating a past use environment, and a past training result.

  The past training results include an upper limit of the allowable delay amount, a lower limit of the allowable delay amount, an upper limit of the allowable level, and a lower limit of the allowable level. Specifically, past training results are calculated based on the upper limit of the allowable delay amount calculated in the memory training executed in the past, the lower limit of the allowable delay amount calculated in the memory training executed in the past, and the past execution result. The upper limit of the tolerance level calculated in the memory training performed and the lower limit of the tolerance level calculated in the memory training executed in the past.

  The past training result further includes a target delay amount and a reference level. Specifically, the past training result further includes a target delay amount indicating the past operating condition of the information processing apparatus 10 and a reference level indicating the past operating condition of the information processing apparatus 10.

  The delay amount will be described as a premise for explaining the allowable delay amount. The delay amount indicates a signal delay amount with reference to the clock. The signal is transmitted from one of the control device 12 and the main storage device 21 to the other. The clock is generated by the clock generator 12f. The clock is a reference for timing at which the control device 12 transmits and receives signals. Signal transmission / reception by the control device 12 is performed in synchronization with the clock. That is, in the first embodiment, the delay amount indicates the delay time of the second timing at which the control device 12 transmits and receives signals with respect to the first timing at which the clock edge occurs. The first timing at which the clock edge occurs indicates the timing at which the clock rises or the timing at which the clock fall occurs.

  The allowable delay amount indicates a range of a delay amount in which the control device 12 can receive a signal without error. That is, the allowable delay amount indicates a range of delay amount that the control device 12 can receive a signal in correspondence with a desired first timing.

  The upper limit of the allowable delay amount indicates the maximum value of the delay amount that allows the control device 12 to receive a signal without error. The lower limit of the allowable delay amount indicates a minimum value of the delay amount that allows the control device 12 to receive a signal without error.

  The target delay amount indicates a median value between the upper limit of the allowable delay amount and the lower limit of the allowable delay amount. That is, the target delay amount is an average value of the upper limit of the allowable delay amount and the lower limit of the allowable delay amount.

  The reference voltage will be described as a premise for explaining the allowable level. The reference voltage indicates a voltage used when the control device 12 calculates information indicated by the signal. That is, the control device 12 calculates information indicated by the signal based on the reference voltage. In the first embodiment, the control device 12 calculates which of information “0” and “1” is indicated by the signal based on the reference voltage. For example, when the signal has a voltage equal to or higher than the reference voltage, the control device 12 calculates that the information indicated by the signal is “1”. When the signal has a voltage smaller than the reference voltage, the control device 12 calculates that the information indicated by the signal is “0”.

  The allowable level indicates a reference voltage range in which the control device 12 can calculate the information indicated by the signal without error. In the first embodiment, the allowable level indicates that the control device 12 can calculate without error whether the information indicated by the signal indicates “0” or “1”.

  The upper limit of the allowable level indicates the maximum value of the reference voltage that allows the control device 12 to calculate the information indicated by the signal without error. The lower limit of the allowable level indicates the minimum value of the reference voltage that allows the control device 12 to calculate the information indicated by the signal without error.

  The reference level indicates a median value between the upper limit of the reference voltage and the lower limit of the reference voltage. That is, the reference level is an average value of the upper limit of the reference voltage and the lower limit of the reference voltage.

  Next, the operation of the control device 12 will be described with reference to FIG. FIG. 4 is a first flowchart showing the operation of the control device 12 of the first embodiment.

  As shown in FIG. 4, when the information processing apparatus 10 is activated, memory training is executed. In the first embodiment, memory training is executed every time the information processing apparatus 10 is activated.

  In step S10, the information processing apparatus 10 is activated. When the information processing apparatus 10 is activated, for example, (i) the voltage is supplied to the control apparatus 12 from a state where no voltage is supplied to the control apparatus 12, and (ii) the control apparatus 12 is activated from the sleep state ( (Iii) indicates that the control device 12 is restarted.

  In step S <b> 11, the first determination unit 12 a acquires information indicating the usage environment of the information processing apparatus 10 (physical quantity indicating the usage environment) from the detection device 14. Specifically, the first determination unit 12a acquires information indicating the supply voltage from the first detection unit 14a. Furthermore, the 1st determination part 12a acquires the information which shows internal temperature from the 2nd detection part 14b. In the first embodiment, the first determination unit 12a detects the supply voltage Fa, and the second detection unit 14b detects the internal temperature Ga. Therefore, in the first embodiment, the first determination unit 12a acquires information indicating the supply voltage Fa and information indicating the internal temperature Ga.

  In step S12, the first determination unit 12a executes a training initial condition determination process. Specifically, the first determination unit 12 a determines the initial training condition based on the latest configuration information, the physical quantity indicating the latest usage environment, and the training record 24.

  The latest configuration information indicates the configuration information of the information processing apparatus 10 when the latest memory training is executed. That is, the latest configuration information indicates the current configuration information of the information processing apparatus 10. In the first embodiment, the latest configuration information is stored in the first storage unit 23.

  The physical quantity indicating the latest use environment is a physical quantity indicating the use environment when the latest memory training is executed. The physical quantity indicating the latest use environment is detected by the detection device 14. Specifically, the physical quantity indicating the latest use environment indicates the latest supply voltage and the latest internal temperature. The latest supply voltage indicates the supply voltage when the latest memory training is executed. The latest internal temperature indicates the internal temperature when the latest memory training is executed.

  The initial training condition indicates a physical quantity serving as a reference when memory training is started. That is, the memory training is started from the physical quantity defined by the initial training conditions. The initial training condition indicates a first delay amount, a second delay amount, a first reference voltage, and a second reference voltage. Each of the first delay amount and the second delay amount indicates a delay amount at the start of the memory training. That is, each of the first delay amount and the second delay amount indicates a delay amount at the start of the latest memory training. Each of the first reference voltage and the second reference voltage indicates a reference voltage at the start of memory training. That is, each of the first reference voltage and the second reference voltage indicates a reference voltage at the start of the latest memory training.

  Determining the initial training condition means determining the first delay amount, the second delay amount, the first reference voltage, and the second reference voltage.

  Next, with reference to FIG. 5, the procedure in which the 1st determination part 12a determines a training initial condition is demonstrated. FIG. 5 is a flowchart showing the training initial condition determination process.

  As shown in FIG. 5, the first determination unit 12a determines the initial training condition based on a predetermined rule. Below, the procedure (step S121-step S123) in which the 1st determination part 12a determines training initial conditions based on a predetermined prescription | regulation is demonstrated. That is, step S12 includes steps S121 to S123.

  In step S121, the first determination unit 12a determines a plurality of candidate information. Each of the plurality of candidate information indicates training information 25 having the same configuration information as the latest configuration information among the plurality of training information 25 included in the training record 24.

In the first embodiment, the latest configuration information includes first information A1, second information B1, third information C1, fourth information D1, and fifth information E1.
On the other hand, in the training record 24, the first training information 251, the (N-1) th training information 25 (N-1), and the Nth training information 25N are the first information A1 and the second information B1. And third information C1, fourth information D1, and fifth information E1, and the same configuration information as the latest configuration information (see FIG. 3). Accordingly, the first determination unit 12a determines the first training information 251, the (N-1) th training information 25 (N-1), and the Nth training information 25N as candidate information.

  In step S122, the first determination unit 12a determines reference information. The first determination unit 12a determines any one of the plurality of candidate information as reference information.

  A procedure ((i) to (v)) by which the first determination unit 12a determines the reference information will be described.

  (I) The first determination unit 12a calculates a voltage difference for each candidate information. The voltage difference indicates a difference between the supply voltage Fa and the supply voltage included in the candidate information. Specifically, the voltage difference indicates a difference between the supply voltage Fa when the latest memory training is executed and the supply voltage included in the candidate information.

In the first embodiment, the candidate information includes first training information 251, (N-1) th training information 25 (N-1), and Nth training information 25N. Therefore, the first determination unit 12a calculates the voltage difference of the first training information 251, the voltage difference of the (N-1) th training information 25 (N-1), and the voltage difference of the Nth training information 25N. To do.
The voltage difference of the first training information 251 is a voltage difference (| Fa−F1 |).
The voltage difference of the (N-1) th training information 25 (N-1) is a voltage difference (| Fa-F4 |).
The voltage difference of the Nth training information 25N is a voltage difference (| Fa−F5 |).

  (Ii) The first determination unit 12a calculates a temperature difference for each candidate information. The temperature difference indicates a difference between the internal temperature Ga and the internal temperature included in the candidate information. Specifically, the voltage difference indicates a difference between the internal temperature Ga when the latest memory training is executed and the supply voltage included in the candidate information.

In the first embodiment, the temperature difference of the first training information 251 is a temperature difference (| Ga−G1 |).
The temperature difference of the (N-1) th training information 25 (N-1) is a temperature difference (| Ga-G4 |).
The temperature difference of the Nth training information 25N is a temperature difference (| Ga−G5 |).

  (Iii) For each candidate information, the first determination unit 12a calculates a first environment value (environment value) that represents a change in the use environment based on the voltage difference and the temperature difference. The first environmental value is a sum of a value obtained by multiplying the voltage difference by a predetermined first coefficient α1 and a value obtained by multiplying the temperature difference by a predetermined second coefficient α2.

  Each of the first coefficient α1 and the second coefficient α2 is a positive real number. Each of the first coefficient α1 and the second coefficient α2 is set in advance. Information indicating each of the first coefficient α1 and the second coefficient α2 is stored in the auxiliary storage device 22. Each of the first coefficient α1 and the second coefficient α2 has a size corresponding to the first environmental value. That is, when the voltage difference is reflected in the first environmental value rather than the temperature difference, the first coefficient α1 is set to a value larger than the second coefficient α2 (α1> α2). On the other hand, when the temperature difference is reflected in the first environmental value rather than the voltage difference, the second coefficient α2 is set to a value larger than the first coefficient α1 (α2> α1). When the voltage difference and the temperature difference are reflected equally on the first environmental value, the first coefficient α1 and the second coefficient α2 are set to the same value (α1 = α2).

In the first embodiment, the first training information 251 has a first environment value Z1 (Z1 = α1 × (| Fa−F1 |) + α2 × (| Ga−G4 |)).
The (N−1) th training information 25 (N−1) has a first environment value Z2 (Z2 = α1 × (| Fa−F4 |) + α2 × (| Ga−G4 |)).
The Nth training information 25N has a first environment value Z3 (Z3 = α1 × (| Fa−F5 |) + α2 × (| Ga−G5 |)).

  (Iv) The first determination unit 12a determines the minimum first environment value having the minimum value among the first environment values calculated for each candidate information.

  In the first embodiment, the first environment value Z3 has the smallest value among the first environment value Z1, the first environment value Z2, and the first environment value Z3 (Z1> Z2> Z3). Therefore, the first determination unit 12a determines the first environment value Z3 as the minimum environment value.

  (V) The first determination unit 12a determines the training information 25 corresponding to the minimum environment value as reference information.

  In the first embodiment, the first determination unit 12a determines the Nth training information 25N corresponding to the first environment value Z3 as reference information.

  When the first determination unit 12a determines the reference information, the process proceeds to step S123.

  In step S123, the first determination unit 12a determines an initial training condition. Specifically, the first determination unit 12a determines a first delay amount, a second delay amount, a first reference voltage, and a second reference voltage.

The first determination unit 12a determines the upper limit of the allowable delay amount included in the reference information as the first delay amount.
The first determination unit 12a determines the lower limit of the allowable delay amount included in the reference information as the second delay amount.
The first determination unit 12a determines the upper limit of the allowable level included in the reference information as the first reference voltage.
The first determination unit 12a determines the lower limit of the allowable level included in the reference information as the second reference voltage.

In the first embodiment, the first determination unit 12a determines the upper limit H5 of the allowable delay amount included in the Nth training information 25N as the first delay amount.
The first determination unit 12a determines the lower limit J5 of the allowable delay amount included in the Nth training information 25N as the second delay amount.
The first determination unit 12a determines the upper limit L5 of the allowable level included in the Nth training information 25N as the first reference voltage.
The first determination unit 12a determines the lower limit M5 of the allowable level included in the Nth training information 25N as the second reference voltage.

  As described above with reference to FIG. 5, the first determination unit 12 a determines the initial training condition based on the latest configuration information, the physical quantity indicating the latest usage environment, and the training record 24. Therefore, when determining the training initial condition, the first determination unit 12a can reflect the physical quantity indicating the latest use environment in the training initial condition. As a result, an increase in time required for memory training can be suppressed.

  Further, by suppressing an increase in the time required for memory training, it is possible to reduce the time required to start up the information processing apparatus 10 and to reduce the time required to return to power saving. As a result, the information processing apparatus 10 can be stably operated.

  Subsequently, the operation of the control device 12 will be described with reference to FIGS. 4 and 6A to 7B.

  As shown in FIG. 4, when the first determination unit 12a determines the initial training condition, the process proceeds to step S13.

  In step S13, the execution unit 12b executes memory training based on the initial training conditions. That is, the execution unit 12b executes the latest memory training. Executing the memory training means that the execution unit 12b calculates the upper limit Ha of the allowable delay amount, the lower limit Ja of the allowable delay amount, the upper limit La of the allowable level, and the lower limit Ma of the allowable level.

  The memory training includes a first process, a second process, a third process, and a fourth process. That is, the execution unit 12b executes the first process, the second process, the third process, and the fourth process.

  FIG. 6A is a first conceptual diagram showing the first process and the second process. FIG. 6B is a second conceptual diagram showing the first process and the second process.

  As shown in FIGS. 6A and 6B, in the first process, the execution unit 12b changes the delay amount from the first delay amount. Specifically, in the first process, the execution unit 12b gradually changes the delay amount from the first delay amount.

  In the first embodiment, the upper limit H5 of the allowable delay amount is determined as the first delay amount (see step S123). Therefore, the execution unit 12b changes the delay amount from the upper limit H5.

  In the first process, the execution unit 12b changes the delay amount from the first delay amount, and calculates the upper limit Ha of the allowable delay amount by receiving a signal from the main storage device 21 each time the delay amount is changed. To do.

  Specifically, in the first process, the execution unit 12b changes the delay amount from the first delay amount (specifically, gradually increases or decreases). The execution unit 12b receives a signal from the main storage device 21 every time the delay amount is changed. The execution unit 12b calculates the upper limit Ha of the allowable delay amount by determining whether or not the signal can be received without error every time the signal is received. That is, the execution unit 12b calculates the delay amount corresponding to the boundary between when the signal can be received without error and when the signal cannot be received without error as the upper limit Ha of the allowable delay amount.

  As illustrated in FIG. 6A, when the execution unit 12b determines that the signal has been received without error while the delay amount of the signal is the first delay amount, the first delay amount is included in the allowable delay amount. Therefore, when the execution unit 12b determines that the signal has been received without error while the signal delay amount is the first delay amount, the execution unit 12b gradually increases the delay amount from the first delay amount. As a result, the execution unit 12b can bring the delay amount of the signal to be determined closer to the upper limit Ha of the allowable delay amount, and can calculate the upper limit Ha of the allowable delay amount.

  On the other hand, as shown in FIG. 6B, when the execution unit 12b determines that the signal cannot be received without error when the delay amount of the signal is the first delay amount, the first delay amount is the allowable delay amount. Not included. Therefore, when the execution unit 12b determines that the signal cannot be received without error while the signal delay amount is the first delay amount, the execution unit 12b gradually decreases the delay amount from the first delay amount. As a result, the execution unit 12b can bring the delay amount of the signal to be determined closer to the upper limit Ha of the allowable delay amount, and can calculate the upper limit Ha of the allowable delay amount.

  As shown in FIGS. 6A and 6B, in the second process, the execution unit 12b changes the delay amount from the second delay amount. Specifically, in the second process, the execution unit 12b gradually changes the delay amount from the second delay amount.

  In the first embodiment, the lower limit J5 of the allowable delay amount is determined as the second delay amount (see step S123). Therefore, the execution unit 12b changes the delay amount from the lower limit J5.

  In the second processing, the execution unit 12b changes the delay amount from the second delay amount, and calculates the lower limit Ja of the allowable delay amount by receiving a signal from the main storage device 21 each time the delay amount is changed. To do.

  Specifically, in the second process, the execution unit 12b changes the delay amount from the second delay amount (specifically, gradually increases or decreases). The execution unit 12b receives a signal from the main storage device 21 every time the delay amount is changed. The execution unit 12b calculates the lower limit Ja of the allowable delay amount by determining whether or not the signal has been received without error each time the signal is received. That is, the execution unit 12b calculates the delay amount corresponding to the boundary between when the signal can be received without error and when the signal cannot be received without error as the lower limit Ja of the allowable delay amount.

  As illustrated in FIG. 6A, when the execution unit 12b determines that the signal has been received without error in a state where the signal delay amount is the second delay amount, the execution unit 12b determines the delay amount from the first delay amount. Is gradually reduced. As a result, the execution unit 12b can bring the delay amount of the signal to be determined closer to the lower limit Ja of the allowable delay amount, and can calculate the lower limit Ja of the allowable delay amount.

  On the other hand, as shown in FIG. 6B, when the execution unit 12b determines that the signal cannot be received without error while the delay amount of the signal is the second delay amount, the execution unit 12b The delay amount is gradually increased from the amount. As a result, the execution unit 12b can bring the delay amount of the signal to be determined closer to the lower limit Ja of the allowable delay amount, and can calculate the lower limit Ja of the allowable delay amount.

  FIG. 7A is a first conceptual diagram showing the third process and the fourth process. FIG. 7B is a second conceptual diagram showing the third process and the fourth process.

  As shown in FIGS. 7A and 7B, in the third process, the execution unit 12b changes the reference voltage from the first reference voltage. Specifically, in the third process, the execution unit 12b gradually changes the reference voltage from the first reference voltage.

  In the first embodiment, the upper limit L5 of the allowable level is determined as the first reference voltage (see step S123). Therefore, the execution unit 12b changes the reference voltage from the upper limit L5.

  In the third process, the execution unit 12b changes the reference voltage from the first reference voltage, and calculates the upper limit La of the allowable level by receiving a signal from the main storage device 21 each time the reference voltage is changed. .

  Specifically, in the third process, the execution unit 12b changes the reference voltage from the first reference voltage (specifically, gradually increases or decreases). Then, every time the reference voltage is changed, the execution unit 12b receives a signal from the main storage device 21 and calculates information indicated by the signal based on the changed reference voltage. Then, the execution unit 12b calculates the upper limit La of the allowable level by determining whether or not the information indicated by the signal has been calculated without error. That is, the execution unit 12b calculates the reference voltage corresponding to the boundary between when the information indicated by the signal can be calculated without error and when the information indicated by the signal cannot be calculated without error as the upper limit La of the allowable level. The execution unit 12b receives the signal in a state where the information indicated by the signal is known in advance. Then, the execution unit 12b calculates information indicated by the received signal, compares the calculated information with information known in advance, and determines whether the information indicated by the received signal has been calculated without error.

  As illustrated in FIG. 7A, when the execution unit 12b determines that the information indicated by the signal has been calculated without error while the reference voltage is the first reference voltage, the first reference voltage is included in the allowable level. Therefore, when the execution unit 12b determines that the information indicated by the signal can be calculated without error while the reference voltage is the first reference voltage, the execution unit 12b gradually increases the reference voltage from the first reference voltage. As a result, the execution unit 12b can bring the reference voltage to be determined closer to the upper limit La of the allowable level and calculate the upper limit La of the allowable level.

  On the other hand, as shown in FIG. 7B, when the execution unit 12b determines that the information indicated by the signal cannot be calculated without error when the reference voltage is the first reference voltage, the first reference voltage is at an allowable level. Not included. Therefore, when the execution unit 12b determines that the information indicated by the signal cannot be calculated without error when the reference voltage is the first reference voltage, the execution unit 12b gradually decreases the reference voltage from the first reference voltage. As a result, the execution unit 12b can bring the reference voltage to be determined closer to the upper limit La of the allowable level and calculate the upper limit La of the allowable level.

  As shown in FIGS. 7A and 7B, in the fourth process, the execution unit 12b changes the reference voltage from the second reference voltage. Specifically, in the fourth process, the execution unit 12b gradually changes the reference voltage from the second reference voltage.

  In the first embodiment, the lower limit M5 of the allowable level is determined as the twelfth quasi-voltage (see step S123). Therefore, the execution unit 12b changes the reference voltage from the lower limit M5.

  In the fourth process, the execution unit 12b changes the reference voltage from the second reference voltage, and receives the signal from the main storage device 21 each time the reference voltage is changed, thereby calculating the lower limit Ma of the allowable level. .

  Specifically, in the fourth process, the execution unit 12b changes the reference voltage from the second reference voltage (specifically, gradually increases or decreases). Then, every time the reference voltage is changed, the execution unit 12b receives a signal from the main storage device 21 and calculates information indicated by the signal based on the changed reference voltage. Then, the execution unit 12b calculates the lower limit Ma of the allowable level by determining whether or not the information indicated by the signal has been calculated without error. That is, the execution unit 12b calculates the reference voltage corresponding to the boundary between when the information indicated by the signal can be calculated without error and when the information indicated by the signal cannot be calculated without error as the lower limit Ma of the allowable level.

  As shown in FIG. 7A, when the execution unit 12b determines that the information indicated by the signal can be calculated without error when the reference voltage is the second reference voltage, the execution unit 12b Reduce voltage gradually. As a result, the execution unit 12b can bring the reference voltage to be determined closer to the lower limit Ma of the allowable level and calculate the lower limit Ma of the allowable level.

  On the other hand, as shown in FIG. 7B, when the execution unit 12b determines that the information indicated by the signal cannot be calculated without error when the reference voltage is the second reference voltage, the execution unit 12b The reference voltage is gradually increased from the reference voltage. As a result, the execution unit 12b can bring the reference voltage to be determined closer to the lower limit Ma of the allowable level and calculate the lower limit Ma of the allowable level.

  When the execution unit 12b calculates the upper limit Ha of the allowable delay amount, the lower limit Ja of the allowable delay amount, the upper limit La of the allowable level, and the lower limit Ma of the allowable level, the process illustrated in step S13 ends.

  As described above with reference to FIG. 4 and FIGS. 6A to 7B, the first determination unit 12a includes the latest configuration information, the physical quantity indicating the latest use environment, and the training record. 24, the first delay amount (the upper limit H5 in the first embodiment) is determined. Therefore, when determining the first delay amount, the first determination unit 12a can reflect the physical amount indicating the latest use environment in the first delay amount, and approximate the first delay amount to the upper limit Ha of the allowable delay amount. It is possible to determine the value obtained. As a result, when the execution unit 12b executes the first process, the time required for the first process can be shortened, and an increase in the time required for memory training can be suppressed.

  Further, the first determination unit 12a determines the second delay amount (the lower limit J5 in the first embodiment) based on the latest configuration information, the physical quantity indicating the latest use environment, and the training record 24. Therefore, when determining the second delay amount, the first determination unit 12a can reflect the physical amount indicating the latest use environment in the second delay amount, and approximate the second delay amount to the lower limit Ja of the allowable delay amount. It is possible to determine the value obtained. As a result, when the execution unit 12b executes the second process, the time required for the second process can be shortened, and an increase in the time required for memory training can be suppressed.

  Further, the first determination unit 12a determines the first reference voltage (the upper limit L5 in the first embodiment) based on the latest configuration information, the physical quantity indicating the latest usage environment, and the training record 24. Therefore, when determining the first reference voltage, the first determination unit 12a can reflect the physical quantity indicating the latest use environment in the first reference voltage, and approximates the first reference voltage to the upper limit La of the allowable level. The value can be determined. As a result, when the execution unit 12b executes the third process, the time required for the third process can be shortened, and an increase in the time required for the memory training can be suppressed.

  In addition, the first determination unit 12a determines the second reference voltage (the lower limit M5 in the first embodiment) based on the latest configuration information, the physical quantity indicating the latest use environment, and the training record 24. Therefore, when determining the second reference voltage, the first determination unit 12a can reflect the physical quantity indicating the latest use environment in the second reference voltage, and approximates the second reference voltage to the lower limit Ma of the allowable level. The value can be determined. As a result, when the execution unit 12b executes the fourth process, the time required for the fourth process can be shortened, and an increase in the time required for memory training can be suppressed.

  Next, the operation of the control device 12 will be described with reference to FIG.

  As shown in FIG. 4, when the process shown in step S13 ends, the process proceeds to step S14.

  In step S14, the generation unit 12c generates the latest training information 25 based on the memory training (see step S13). That is, the generation unit 12c generates the latest training information 25 based on the latest memory training.

  The latest training information 25 indicates information in which the latest configuration information, the physical quantity indicating the latest use environment, and the latest training result are associated with each other.

  The latest training result indicates the training result of the latest memory training. Specifically, the latest training result is calculated by the upper limit Ha of the allowable delay amount calculated by the latest memory training, the lower limit Ja of the allowable delay amount calculated by the latest memory training, and the latest memory training. The upper limit La of the allowable level and the lower limit Ma of the allowable level calculated in the latest memory training are included.

  The latest training result further includes a target delay amount Ka and a reference level Pa. Specifically, the latest training result further includes a target delay amount Ka indicating the latest operating condition of the information processing apparatus 10 and a reference level Pa indicating the latest operating condition of the information processing apparatus 10.

  The target delay amount Ka indicates a median value between the upper limit Ha of the allowable delay amount and the lower limit Ja of the allowable delay amount. The reference level Pa indicates a median value between the upper limit La of the allowable level and the lower limit Ma of the allowable level.

  In the first embodiment, the latest training information 25 includes first information A1, second information B1, third information C1, fourth information D1, and fifth information E1 as configuration information (steps). (See S121). The latest training information 25 includes a supply voltage Fa and an internal temperature Ga as physical quantities indicating the use environment (see step S11). The latest training information 25 includes, as a training result, an upper limit Ha of the allowable delay amount, a lower limit Ja of the allowable delay amount, an upper limit La of the allowable level, a lower limit Ma of the allowable level, a target delay amount Ka, and a reference. Level Pa.

  When the generation unit 12c generates the latest training result, the memory training is completed. That is, the memory training is completed when the generation unit 12c calculates the target delay amount Ka and the reference level Pa.

  In step S <b> 15, the generation unit 12 c stores the latest training information 25 that is a record of the latest memory training in the auxiliary storage device 22. Specifically, the generation unit 12 c adds the latest training information 25 to the training record 24.

  In step S <b> 16, the second determination unit 12 d determines the target delay amount Ka and the reference level Pa as operating conditions of the information processing apparatus 10.

  In step S17, the control unit 12e operates the information processing apparatus 10 normally. That is, the control unit 12e operates the information processing apparatus 10 under the operation condition determined by the second determination unit 12d. Specifically, the control unit 12e operates the information processing apparatus 10 based on the target delay amount Ka and the reference level Pa. Accordingly, the control unit 12e controls the signal so that the delay amount of the signal becomes the target delay amount Ka. Further, the control unit 12e calculates information indicated by the signal using the reference level Pa. That is, the control unit 12e calculates which of the information indicated by the signal “0” or “1” is based on the reference level Pa.

  As described above with reference to FIG. 4, the generation unit 12 c stores the latest training information 25, which is the latest memory training record, in the auxiliary storage device 22 and adds it to the training record 24. Therefore, the amount of information that the training record 24 has can be increased, and the first determination unit 12a can determine the training initial condition more accurately. That is, the first determination unit 12a can determine the first delay amount to a value more approximate to the upper limit of the allowable delay amount. Further, the first determination unit 12a can determine the second delay amount to a value more approximate to the lower limit of the allowable delay amount. Further, the first determination unit 12a can determine the first reference voltage to a value more approximate to the upper limit of the allowable level. Further, the first determination unit 12a can determine the second reference voltage to a value more approximate to the lower limit of the allowable level. As a result, an increase in time required for memory training can be effectively suppressed.

  Further, the control unit 12e operates the information processing apparatus 10 based on the target delay amount Ka calculated by the memory training and the reference level Pa. Therefore, it is possible to improve the accuracy of transmitting and receiving information indicated by the signal without error. That is, the reliability of signal transmission can be improved. As a result, the information processing apparatus 10 can be operated stably.

[Second Embodiment]
Next, a second embodiment of the image forming apparatus 100 will be described with reference to FIG. FIG. 8 is a flowchart showing the operation of the control device 12 of the second embodiment.

  The information processing apparatus 10 according to the second embodiment is different from the information processing apparatus 10 according to the first embodiment in that memory training is executed not only when the information processing apparatus 10 is activated but also during the activation of the information processing apparatus 10.

  The information processing apparatus 10 according to the second embodiment performs memory training when the information processing apparatus 10 is activated in the same procedure as the information processing apparatus 10 according to the first embodiment (see FIG. 4). Therefore, in the second embodiment, description of memory training when the information processing apparatus 10 is activated will be omitted, and memory training while the information processing apparatus 10 is activated will be described.

  As illustrated in FIG. 8, in step S17, the control unit 12e causes the information processing apparatus 10 to normally operate. The process shown in step S17 of the second embodiment is the same as the process shown in step S17 of the first embodiment. That is, after the process shown in steps S10 to S16 of the first embodiment is executed, the process shown in step S17 of the second embodiment is executed.

  In step S18, the control unit 12e determines whether or not a certain time has elapsed since the information processing apparatus 10 started normal operation. Specifically, the control unit 12e includes a timer, and determines whether or not a certain time has elapsed using the timer. The fixed time is set in advance. Information indicating the predetermined time is stored in the auxiliary storage device 22. The certain time can be changed via the input unit 3.

  If the control unit 12e determines that a certain time has elapsed since the information processing apparatus 10 started normal operation (Yes in step S18), the process proceeds to step S19. On the other hand, if the control unit 12e determines that a certain time has not elapsed since the information processing apparatus 10 started normal operation (No in step S18), the process proceeds to step S17.

  In step S <b> 19, the first determination unit 12 a acquires information indicating the usage environment of the information processing apparatus 10 (physical quantity indicating the usage environment) from the detection device 14. Specifically, when a certain time has elapsed since the information processing apparatus 10 started normal operation, the detection apparatus 14 detects the use environment. Then, the first determination unit 12 a acquires information indicating the use environment from the detection device 14. In the second embodiment, the first determination unit 12a detects the supply voltage Fb and the second detection unit 14b detects the internal temperature Gb after a certain time has elapsed since the information processing apparatus 10 started normal operation. To do. Therefore, in the second embodiment, the first determination unit 12a acquires information indicating the supply voltage Fb and information indicating the internal temperature Gb.

  In step S20, the first determination unit 12a determines whether or not the second environment value Z4 is equal to or greater than the specified value β. The second environment value Z4 represents a change in the use environment with respect to the use environment during the most recent memory training. Specifically, the first determination unit 12a includes a physical quantity indicating the latest use environment (supply voltage Fb and internal temperature Gb) and a physical quantity indicating the use environment during the latest memory training (supply voltage Fa and internal temperature). Based on (Ga), the second environmental value Z4 (Z4 = α1 × (| Fa−Fb |) + α2 × (| Ga−Gb |)) is calculated. Then, the first determination unit 12a determines whether or not the second environment value Z4 is greater than or equal to the specified value β. The specified value β is set in advance. Information indicating the prescribed value β is stored in the auxiliary storage device 22. The specified value β can be changed via the input unit 3.

When the first determination unit 12a determines that the second environment value Z4 is equal to or greater than the specified value β (Yes in step S20), the process proceeds to step S21.
On the other hand, if the first determination unit 12a determines that the second environment value Z4 is smaller than the specified value β (No in step S20), the process proceeds to step S17. Accordingly, when the first determination unit 12a determines that the second environment value is smaller than the specified value β, the execution unit 12b does not execute the memory training.

  Steps S21 to S25 correspond to steps S12 to S16 of the first embodiment. Accordingly, in step S21, the first determination unit 12a determines the initial training condition according to the procedure shown in step S12. In step S21, when the first determination unit 12a determines the initial training condition, information (supply voltage Fb and internal temperature Gb) indicating the use environment acquired from the detection device 14 is used in step S19. In step S22, the execution unit 12b executes memory training in the procedure shown in step S13. In step S23, the generation unit 12c generates the latest training information 25 according to the procedure shown in step S14. In step S24, the generation unit 12c stores the latest training information 25 in the auxiliary storage device 22 in the procedure shown in step S15. In step S25, the 2nd determination part 12d determines the operating condition of the information processing apparatus 10 in the procedure shown to step S16. When the process shown in step S25 ends, the process proceeds to step S17. As a result, the control unit 12e causes the information processing apparatus 10 to normally operate under the operating condition determined in step S25. And as shown to step S18-step S20, when fixed time passes, the 1st determination part 12a will determine whether the use environment of the information processing apparatus 10 is more than the regulation value (beta).

  As described above with reference to FIG. 8, during the operation of the information processing apparatus 10, the detection apparatus 14 detects the first physical quantity that is the physical quantity indicating the use environment every time a certain time elapses. Then, based on the first physical quantity and the physical quantity indicating the use environment at the time of the latest memory training, the first determination unit 12a detects the second environment value. When the first determination unit 12a determines that the second environment value is equal to or greater than the specified value β, the execution unit 12b executes memory training. Therefore, even if the physical quantity indicating the usage environment changes during the operation of the information processing apparatus 10, it is possible to suppress a decrease in the reliability of signal transmission and to prevent deterioration in signal quality. As a result, the information processing apparatus 10 can be operated stably.

  The embodiment of the present invention has been described above with reference to the drawings (FIGS. 1 to 8). However, the present invention is not limited to the above-described embodiment, and can be implemented in various modes without departing from the gist (for example, (1) to (8)). In addition, various inventions can be formed by appropriately combining a plurality of components disclosed in the above embodiments. For example, some components may be deleted from all the components shown in the embodiment. In order to facilitate understanding, the drawings schematically show each component as a main component, and the number of components shown in the drawings may differ from the actual one due to the convenience of drawing. Moreover, each component shown by said embodiment is an example, Comprising: It does not specifically limit, A various change is possible in the range which does not deviate substantially from the effect of this invention.

  (1) When the first determination unit 12a determines the initial training condition, machine learning such as clustering may be used. Specifically, the first determination unit 12a classifies the plurality of training information 25 included in the training record 24 into a plurality of groups using machine learning. The classification of the plurality of training information 25 is performed based on the configuration information, the physical quantity indicating the use environment, and the training result. When the latest memory training is executed, the first determination unit 12a selects an approximate group from among a plurality of groups. The approximate group is composed of a plurality of predetermined training information 25. The predetermined training information 25 includes configuration information that approximates the configuration information at the time of the latest memory training, and a physical amount that approximates a physical quantity that indicates the use environment at the time of the latest memory training. And the 1st determination part 12a determines reference | standard information from an approximation group, and determines a training initial condition. As a result, the initial training condition can be determined with higher accuracy.

(2) The first determination unit 12a may determine an initial training condition based on the test information. The test information indicates a plurality of pieces of training information acquired by executing memory training in the test environment. The test information is acquired before the information processing apparatus 10 is shipped to the user and stored in advance in the auxiliary storage device 22.
For example, when deterioration of the information processing apparatus 10 (specifically, the control apparatus 12 and the storage apparatus 11) with time is slight, the first determination unit 12a determines the initial training condition based on the test information.
Further, when the accumulated operation time of the information processing apparatus 10 is less than the predetermined time, the number of executions of the memory training is small, and the training information 25 included in the training record 24 is small. In this case, the first determination unit 12a may determine the training initial condition based on the test information. As a result, the initial training conditions can be determined with high accuracy.

  (3) In the second embodiment, the first determination unit 12a determines whether or not the second environment value Z4 is equal to or greater than the specified value β every time a certain time elapses (see step S20). When the first determination unit 12a determines that the second environment value Z4 is equal to or greater than the specified value β, the execution unit 12b executes memory training. However, the present invention is not limited to this. Below, the modification of 2nd Embodiment is demonstrated.

  Each time the image forming apparatus 100 performs a predetermined operation, the detection device 14 detects a second physical quantity that is a physical quantity indicating a use environment. Then, based on the second physical quantity and the physical quantity indicating the use environment at the time of the latest memory training, the first determination unit 12a detects the second environment value. When the first determination unit 12a determines that the second environment value is equal to or greater than the specified value β, the execution unit 12b executes memory training.

  The predetermined operation is an operation of the image forming apparatus 100 in which the physical quantity indicating the usage environment changes by a predetermined value or more. The predetermined operation is, for example, an operation in which the image forming apparatus 100 performs printing. The predetermined operation is determined in advance. The predetermined value is determined in advance.

  Accordingly, when the image forming apparatus 100 performs a predetermined operation and the physical quantity indicating the use environment changes by a predetermined value or more, memory training is executed. In other words, when the image forming apparatus 100 performs a predetermined operation and the second environment value changes by more than the specified value β, memory training is executed. Therefore, even if the information processing apparatus 10 performs a predetermined operation and the physical quantity indicating the usage environment changes, it is possible to suppress a decrease in reliability of signal transmission and to prevent deterioration in signal quality. As a result, the information processing apparatus 10 can be operated stably.

  (4) When the number of the plurality of pieces of training information 25 included in the training record 24 exceeds a predetermined number, the generation unit 12c may stop the process of generating the latest training information 25 (see step S14). That is, when a sufficient number of training information 25 for accurately determining the initial training conditions is accumulated in the training record 24, the generation unit 12c stores the latest training information 24 in the training record 24 even if the latest memory training is executed. The training information 25 is not added. As a result, it is possible to suppress a shortage of capacity in the auxiliary storage device 22.

  (5) The training record 24 may be stored in the cloud. Therefore, the first determination unit 12a can receive necessary information from the training record 24 from the cloud and determine the initial training condition. As a result, the latest training information 25 can be added to the training record 24 without considering the capacity of the auxiliary storage device 22.

  (6) The configuration information includes first information to fifth information. Specifically, each of the past configuration information included in the training record 24 and the latest configuration information stored in the first storage unit 23 includes first information to fifth information. However, the present invention is not limited to this. The configuration information only needs to include at least one of the first information to the fifth information. However, as shown in the first embodiment and the second embodiment, it is advantageous that the configuration information includes the first information to the fifth information in that the first determination unit 12a can determine the training initial condition more accurately. It is.

  (7) The physical quantity indicating the use environment indicates the supply voltage and the internal temperature. Specifically, each of the physical quantity indicating the past use environment included in the training record 24 and the physical quantity indicating the use environment detected by the detection device 14 (the first detection unit 14a and the second detection unit 14b) are supplied. Shows voltage and internal temperature. However, the present invention is not limited to this. The physical quantity indicating the use environment may be configured as in (7-1) or (7-2).

  (7-1) The physical quantity indicating the use environment indicates the supply voltage and does not have to indicate the internal temperature. In this case, the second detection unit 14b is not necessary. Further, in the training record 24, information indicating the internal temperature is not necessary. In step S11, the first determining unit 12a does not need to acquire information indicating the internal temperature Ga. Further, in step S122, the first determination unit 12a determines candidate information having a supply voltage closest to the latest supply voltage among the plurality of candidate information as reference information. For example, the 1st determination part 12a calculates a voltage difference for every candidate information among several candidate information. And the 1st determination part 12a determines the minimum voltage difference which has the minimum value among the voltage differences calculated for every candidate information. Then, the first determination unit 12a determines the training information 25 corresponding to the minimum voltage difference as reference information. Therefore, in step S122, the process for calculating the temperature difference is not required for each candidate information. Moreover, in step S19, the process in which the 1st determination part 12a acquires the information which shows the internal temperature Gb becomes unnecessary. In step S20, the second environment value becomes the second environment value (| Fa−Fb |).

  (7-2) The physical quantity indicating the use environment indicates the internal temperature and does not have to indicate the supply voltage. In this case, the 1st detection part 14a becomes unnecessary. Further, in the training record 24, information indicating the supply voltage is not necessary. In step S11, the first determination unit 12a does not need to acquire information indicating the supply voltage Fa. Further, in step S122, the first determination unit 12a determines candidate information having an internal temperature that is closest to the latest internal temperature among the plurality of candidate information as reference information. For example, the 1st determination part 12a calculates a temperature difference for every candidate information among several candidate information. And the 1st determination part 12a determines the minimum temperature difference which has the minimum value among the temperature differences calculated for every candidate information. Then, the first determination unit 12a determines the training information 25 corresponding to the minimum temperature difference as reference information. Therefore, in step S122, the process for calculating the voltage difference is not required for each candidate information. In step S19, the first determination unit 12a does not need to acquire information indicating the supply voltage Fb. In Step S20, the second environment value becomes the second environment value (| Ga−Gb |).

  (8) In 1st Embodiment, the 1st determination part 12a determines a training initial condition in the procedure shown to step S12 (specifically step S121-step S123). Specifically, the first determination unit 12a determines the first delay amount, the second delay amount, the first reference voltage, and the second reference voltage according to the procedure shown in step S12. However, the present invention is not limited to this. The procedure by which the first determining unit 12a determines the first delay amount, the second delay amount, the first reference voltage, and the second reference voltage is as in (8-1) or (8-2). You may comprise.

  (8-1) In step S12, the first determination unit 12a determines the first delay amount and the second delay amount in the procedure shown in step S12, but in a procedure other than the procedure shown in step S12. The first reference voltage and the second reference voltage may be determined.

  (8-2) In step S12, the first determination unit 12a determines the first reference voltage and the second reference voltage in the procedure shown in step S12, but in a procedure other than the procedure shown in step S12. The first delay amount and the second delay amount may be determined.

  The present invention can be used in the fields of an information processing apparatus and an image forming apparatus that execute memory training at startup.

4 Housing 4a Inside of Housing 10 Information Processing Device 12 Control Device 12a First Determining Unit (Determining Unit)
12b execution unit 12f clock generation unit 14 detection device 14a first detection unit 14b second detection unit 21 main storage device 22 auxiliary storage device 23 first storage unit 24 training record 25 training information 26 second storage unit 100 image forming apparatus Ha allowable Upper limit of delay amount Ja Lower limit of allowable delay amount Upper limit of allowable level Ma Lower limit of allowable level

Claims (11)

An information processing apparatus comprising a control device, a main storage device, and an auxiliary storage device,
A detection device for detecting a physical quantity indicating a use environment of the information processing device;
The control device includes:
A determination unit for determining initial training conditions;
An execution unit for executing memory training based on the initial training conditions;
The auxiliary storage device is
A first storage unit that stores configuration information indicating a configuration of the information processing apparatus;
A second storage unit that stores training records that are records of the plurality of memory trainings executed in the past, and
The training record includes a plurality of training information,
Each of the plurality of training information corresponds to the plurality of memory training executed in the past,
Each of the plurality of training information includes the configuration information when the memory training has been executed in the past, the physical quantity indicating the usage environment when the memory training has been executed in the past, and the past executed Shows information that correlates with training results of memory training,
The determination unit determines the initial training condition based on the latest configuration information, the latest physical quantity indicating the use environment, and the training record,
The latest configuration information indicates the configuration information when the latest memory training is executed,
The information processing apparatus, wherein the physical quantity indicating the latest use environment is a physical quantity indicating the use environment when the latest memory training is executed. The control device further includes a clock generation unit that generates a clock serving as a reference for timing at which the control device transmits and receives signals,
The training initial condition indicates a first delay amount and a second delay amount that are delay amounts at the start of the memory training,
The delay amount indicates a delay amount of the signal with respect to the clock,
The memory training is
The first delay amount is changed from the first delay amount, and each time the delay amount is changed, the execution unit receives the signal from the main storage device, thereby calculating an upper limit of the allowable delay amount. Processing,
The delay amount is changed from the second delay amount, and each time the delay amount is changed, the execution unit receives the signal from the main storage device, thereby calculating a lower limit of the allowable delay amount. Processing and
The training result included in each of the plurality of training information includes an upper limit of the allowable delay amount calculated in the memory training executed in the past and the allowable delay calculated in the memory training executed in the past. The lower limit of the quantity,
The determination unit determines the first delay amount and the second delay amount based on the latest configuration information, a physical quantity indicating the latest use environment, and the training record. The information processing apparatus described in 1. The detection device includes a first detection unit that detects a supply voltage that is a voltage supplied to the control device;
The physical quantity indicating the use environment included in each of the plurality of training information indicates the supply voltage when the memory training was executed in the past,
The determination unit
Of the plurality of training information included in the training record, training information having the same configuration information as the latest configuration information is determined as candidate information,
Among the plurality of candidate information, the candidate information having the supply voltage that is closest to the latest supply voltage is determined as reference information,
An upper limit of the allowable delay amount included in the reference information is determined as the first delay amount;
A lower limit of the allowable delay amount included in the reference information is determined as the second delay amount;
The information processing apparatus according to claim 2, wherein the latest supply voltage indicates the supply voltage when the latest memory training is executed. A housing for accommodating the control device and the main storage device;
The detection device includes a second detection unit that detects an internal temperature that is an internal temperature of the housing;
The physical quantity indicating the use environment included in each of the plurality of training information indicates the internal temperature when the memory training was executed in the past,
The determination unit
Of the plurality of training information included in the training record, training information having the same configuration information as the latest configuration information is determined as candidate information,
Among the plurality of candidate information, the candidate information having the internal temperature that is closest to the latest internal temperature is determined as reference information,
An upper limit of the allowable delay amount included in the reference information is determined as the first delay amount;
A lower limit of the allowable delay amount included in the reference information is determined as the second delay amount;
The information processing apparatus according to claim 2, wherein the latest internal temperature indicates the internal temperature when the latest memory training is executed. A housing for accommodating the control device and the main storage device;
The detection device includes:
A first detector that detects a supply voltage that is a voltage supplied to the control device;
A second detector that detects an internal temperature that is an internal temperature of the housing;
The physical quantity indicating the use environment included in each of the plurality of training information includes the supply voltage when the memory training is executed in the past and the internal temperature when the memory training is executed in the past. Show
The determination unit
Of the plurality of training information included in the training record, training information having the same configuration information as the latest configuration information is determined as candidate information,
For each candidate information, a voltage difference indicating a difference between the latest supply voltage and the supply voltage included in the candidate information is calculated, and a temperature indicating a difference between the latest internal temperature and the internal temperature included in the candidate information. Calculating a difference, calculating an environmental value representing a change in the use environment based on the voltage difference and the temperature difference;
Of the plurality of candidate information, the candidate information corresponding to the minimum environment value is determined as reference information,
An upper limit of the allowable delay amount included in the reference information is determined as the first delay amount;
A lower limit of the allowable delay amount included in the reference information is determined as the second delay amount;
The latest supply voltage indicates the supply voltage when the latest memory training is performed,
The information processing apparatus according to claim 2, wherein the latest internal temperature indicates the internal temperature when the latest memory training is executed. The training initial condition indicates a first reference voltage and a second reference voltage, which are reference voltages at the start of the memory training,
The reference voltage indicates a voltage used when the control device calculates information indicated by a signal,
The memory training is
A third process of changing the reference voltage from the first reference voltage, and calculating the upper limit of the allowable level by the execution unit receiving the signal from the main storage device each time the reference voltage is changed. When,
The reference voltage is changed from the second reference voltage, and each time the reference voltage is changed, the execution unit receives the signal from the main storage device, thereby calculating a lower limit of the allowable level. Processing and
The training result included in each of the plurality of training information includes an upper limit of the allowable level calculated in the memory training executed in the past and an allowable level calculated in the memory training executed in the past. Including a lower limit,
2. The determination unit determines the first reference voltage and the second reference voltage based on the latest configuration information, a physical quantity indicating the latest use environment, and the training record. The information processing apparatus described in 1. The detection device includes a first detection unit that detects a supply voltage that is a voltage supplied to the control device;
The physical quantity indicating the use environment included in each of the plurality of training information indicates the supply voltage when the memory training was executed in the past,
The determination unit
Of the plurality of training information included in the training record, training information having the same configuration information as the latest configuration information is determined as candidate information,
Among the plurality of candidate information, the candidate information having the supply voltage that is closest to the latest supply voltage is determined as reference information,
An upper limit of the allowable level included in the reference information is determined as the first reference voltage;
A lower limit of the allowable level included in the reference information is determined as the second reference voltage;
The information processing apparatus according to claim 6, wherein the latest supply voltage indicates the supply voltage when the latest memory training is executed. A housing for accommodating the control device and the main storage device;
The detection device includes a second detection unit that detects an internal temperature that is an internal temperature of the housing;
The physical quantity indicating the use environment included in each of the plurality of training information indicates the internal temperature when the memory training was executed in the past,
The determination unit
Of the plurality of training information included in the training record, training information having the same configuration information as the latest configuration information is determined as candidate information,
Among the plurality of candidate information, the candidate information having the internal temperature that is closest to the latest internal temperature is determined as reference information,
An upper limit of the allowable level included in the reference information is determined as the first reference voltage;
A lower limit of the allowable level included in the reference information is determined as the second reference voltage;
The information processing apparatus according to claim 6, wherein the latest internal temperature indicates the internal temperature when the latest memory training is executed. A housing for accommodating the control device and the main storage device;
The detection device includes:
A first detector that detects a supply voltage that is a voltage supplied to the control device;
A second detector that detects an internal temperature that is an internal temperature of the housing;
The physical quantity indicating the use environment included in each of the plurality of training information includes the supply voltage when the memory training is executed in the past and the internal temperature when the memory training is executed in the past. Show
The determination unit
Of the plurality of training information included in the training record, training information having the same configuration information as the latest configuration information is determined as candidate information,
For each candidate information, a voltage difference indicating a difference between the latest supply voltage and the supply voltage included in the candidate information is calculated, and a temperature indicating a difference between the latest internal temperature and the internal temperature included in the candidate information. Calculating a difference, calculating an environmental value representing the use environment based on the voltage difference and the temperature difference;
Of the plurality of candidate information, the candidate information corresponding to the minimum environment value is determined as reference information,
An upper limit of the allowable level included in the reference information is determined as the first reference voltage;
A lower limit of the allowable level included in the reference information is determined as the second reference voltage;
The latest supply voltage indicates the supply voltage when the latest memory training is performed,
The information processing apparatus according to claim 6, wherein the latest internal temperature indicates the internal temperature when the latest memory training is executed. The control device further includes a clock generation unit that generates a clock serving as a reference for timing at which the control device transmits and receives signals,
The initial training conditions include a first delay amount and a second delay amount that are delay amounts at the start of the memory training, and a first reference voltage and a second reference voltage that are reference voltages at the start of the memory training. Show
The delay amount indicates a delay amount of the signal with respect to the clock,
The reference voltage indicates a voltage used when the control device calculates information indicated by the signal,
The memory training is
The first delay amount is changed from the first delay amount, and each time the delay amount is changed, the execution unit receives the signal from the main storage device, thereby calculating an upper limit of the allowable delay amount. Processing,
The delay amount is changed from the second delay amount, and each time the delay amount is changed, the execution unit receives the signal from the main storage device, thereby calculating a lower limit of the allowable delay amount. And processing
A third process of changing the reference voltage from the first reference voltage, and calculating the upper limit of the allowable level by the execution unit receiving the signal from the main storage device each time the reference voltage is changed. When,
The reference voltage is changed from the second reference voltage, and each time the reference voltage is changed, the execution unit receives the signal from the main storage device, thereby calculating a lower limit of the allowable level. Processing and
The training result included in each of the plurality of training information includes an upper limit of the allowable delay amount calculated in the memory training executed in the past and the allowable delay calculated in the memory training executed in the past. A lower limit of the amount, an upper limit of the tolerance level calculated in the memory training executed in the past, and a lower limit of the tolerance level calculated in the memory training executed in the past,
The determination unit, based on the latest configuration information, the physical quantity indicating the latest use environment, and the training record, the first delay amount, the second delay amount, and the first reference voltage, The information processing apparatus according to claim 1, wherein the second reference voltage is determined.   An image forming apparatus comprising the information processing apparatus according to claim 1.

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