JP6503784B2 - INFORMATION PROCESSING APPARATUS AND CONTROL METHOD OF INFORMATION PROCESSING APPARATUS - Google Patents

Description

  The present invention relates to an information processing apparatus and a control method of the information processing apparatus.

  There is an information processing apparatus using two CPUs (Central Processing Units).

  Such a configuration of the information processing apparatus is also applicable to an information processing apparatus having functions such as copying, facsimile, and printer. For example, in the technology disclosed in Patent Document 1, a function expansion board can be inserted into and removed from a slot interface for an additional RAM possessed by the main CPU. The slot interface is to be connected with a sub CPU having memory as a function expansion board or a board with only memory. When the sub CPU having a memory in the slot interface is connected, the memory on the sub CPU side is accessed from the main CPU side, a program for operating the sub CPU from the main CPU is written, and the sub CPU is written by the main CPU It is operated by the program.

JP 2008-59522 A

  In the prior art, when rewriting a program operated on a sub CPU from the main CPU, the program executed by the sub CPU when the sub CPU having a memory is connected to the slot interface, that is, when the hardware configuration changes Is being rewritten. Therefore, in the prior art, the rewriting of the program executed by the sub CPU is not performed unless the hardware configuration is changed. Therefore, the prior art has a problem that it does not cope with rewriting the program executed by the sub CPU when the hardware is not changed.

  Therefore, an object of the present invention is to provide an information processing apparatus capable of complementing the operation of the main CPU by the sub CPU by rewriting the program executed by the sub CPU from the main CPU regardless of the change of the hardware configuration. It is. Another object of the present invention is to control the information processing apparatus capable of complementing the operation of the main CPU by the sub CPU by rewriting the program executed by the sub CPU from the main CPU regardless of the change of the hardware configuration. To provide.

  The above object of the present invention is achieved by the following means.

( 1 ) Main CPU and sub CPU that can operate individually
A sub CPU storage unit storing a sub CPU program executed by the sub CPU;
A sub CPU program storage unit storing a plurality of sub CPU programs to be executed by the sub CPU;
The sub CPU program storage unit stores, as the sub CPU program, a program to be executed during an energy saving mode in which power supply to the main CPU is stopped and a program to be executed during startup of the main CPU. Has been
The main CPU is
When the state to shift to the energy saving mode is entered as the state of the main CPU, the program is rewritten as a program to be executed by the main CPU in the energy saving mode as the sub CPU program,
Wherein when in a state of returning from the energy saving mode as the state of the main CPU, information processor you wherein rewriting the program in which the main CPU executes during startup as a program for the sub-CPU.

( 2 ) The program to be executed by the sub CPU during the energy saving mode by the main CPU includes at least a program for recovering the main CPU, and any one of a reception refusal program not receiving a facsimile and a reception monitoring program for a facsimile. And
The program executed while the main CPU is activated is at least one of a decryption processing program of received facsimile data, an encoding processing program of facsimile data to be transmitted, and an image reduction program of facsimile data. The information processing apparatus according to ( 1 ) above.

( 3 ) The main CPU causes the sub CPU storage unit to store additional information used by the sub CPU as well as a program that the main CPU causes the sub CPU to execute during the energy saving mode. The information processing apparatus according to ( 1 ) or ( 2 ).

( 4 ) The main CPU has a rewritten program storage unit that stores the sub CPU program stored by rewriting the sub CPU storage unit.
When the sub CPU program stored in the sub CPU storage unit is rewritten, the main CPU rewrites the program when the program to be rewritten from now and the program stored in the rewritten program storage unit are the same. The information processing apparatus according to any one of the above (1) to ( 3 ), which is not performed.
(5) A main CPU and a sub CPU that can operate individually
A sub CPU storage unit storing a sub CPU program executed by the sub CPU;
A sub CPU program storage unit storing a plurality of sub CPU programs to be executed by the sub CPU;
The main CPU selects the sub CPU program from the sub CPU program storage unit according to the state and setting contents when the state of the main CPU changes or when the setting is changed. And rewriting the sub CPU program stored in the sub CPU storage unit,
The main CPU has a rewritten program storage unit that stores the sub CPU program stored by rewriting and storing the sub CPU storage unit,
When the sub CPU program stored in the sub CPU storage unit is rewritten, the main CPU rewrites the program when the program to be rewritten from now and the program stored in the rewritten program storage unit are the same. An information processing apparatus characterized by not performing.

  (6) The information processing apparatus is connected to an external device by a network, and the sub CPU program stored in the sub CPU program storage unit is stored from the external device. The information processing apparatus according to any one of (1) to (5).

( 7 ) The main CPU and sub CPU that can operate individually
A sub CPU storage unit storing a sub CPU program executed by the sub CPU;
A control method of an information processing apparatus, comprising: a sub CPU program storage unit storing a plurality of sub CPU programs to be executed by the sub CPU.
The sub CPU program storage unit stores, as the sub CPU program, a program to be executed during an energy saving mode in which power supply to the main CPU is stopped and a program to be executed during startup of the main CPU. Has been
When the state to shift to the energy saving mode is entered as the state of the main CPU, the program is rewritten as a program executed by the main CPU during the energy saving mode as the sub CPU program,
Wherein when in a state of returning from the energy saving mode as the state of the main CPU, the control method of the information processing apparatus you wherein rewriting the program in which the main CPU executes during startup as a program for the sub-CPU.

( 8 ) The program to be executed by the sub CPU while the energy saving mode by the main CPU includes at least a program for returning the main CPU, and any of a reception refusal program not receiving a facsimile and a reception monitoring program for facsimile And
The program executed while the main CPU is activated is at least one of a decryption processing program of received facsimile data, an encoding processing program of facsimile data to be transmitted, and an image reduction program of facsimile data. The control method of the information processing apparatus as described in said ( 7 ).

(9) the main CPU with programs to be executed by the sub CPU in the energy-saving mode, the (7) also accompanying information the sub CPU is used and wherein it is stored in the storage unit for the sub-CPU or (8 The control method of the information processing apparatus as described in 4.).

( 10 ) It is stored what is the rewritten sub CPU program which has been rewritten and stored the sub CPU storage unit,
The control method of the information processing apparatus according to any one of the above (7) to ( 9 ), wherein rewriting is not performed when the program to be rewritten from now on and the stored rewritten program are the same.
(11) A main CPU and a sub CPU that can operate individually,
A sub CPU storage unit storing a sub CPU program executed by the sub CPU;
A control method of an information processing apparatus, comprising: a sub CPU program storage unit storing a plurality of sub CPU programs to be executed by the sub CPU.
When the state of the main CPU changes or when the setting is changed, the sub CPU program is selected from the sub CPU program storage unit according to the state and the setting content, and the sub CPU is selected. Rewriting the sub CPU program stored in the storage unit;
It is stored what is the rewritten sub CPU program which has been rewritten and stored the sub CPU storage unit,
A control method of an information processing apparatus characterized in that rewriting is not performed when a program to be rewritten from now on and the stored rewritten program are the same.

  (12) The information processing apparatus is connected to an external apparatus by a network, and the sub CPU program stored in the sub CPU program storage unit is stored from the external apparatus. The control method of the information processing apparatus according to any one of (11) to (11).

  According to the present invention, a plurality of programs to be executed by the sub CPU are stored in the apparatus, and the programs of the operation changing state and the setting changing sub CPU are caused due to the occurrence of the change of the operation state or the setting change. I decided to rewrite it. Therefore, regardless of the change of the hardware resource, the processing capacity of the sub CPU can be effectively used, and the operation of the main CPU can be complemented according to the operation state and setting at that time.

FIG. 2 is a block diagram for describing a configuration of an MFP in the embodiment. FIG. 7 is an explanatory diagram for describing an operation example 1; FIG. 5 is an explanatory diagram for describing an operation example 1 following FIG. 2; FIG. 5 is an explanatory diagram for describing an operation example 1 following FIG. 3; FIG. 5 is an explanatory diagram for describing an operation example 1 following FIG. 4; FIG. 10 is an explanatory diagram for describing an operation example 2; FIG. 7 is an explanatory diagram for describing an operation example 2 following FIG. 6; FIG. 8 is an explanatory diagram for describing an operation example 2 following FIG. 7; FIG. 9 is an explanatory diagram for describing an operation example 2 following FIG. 8; It is a flowchart which shows the process sequence of the whole program rewriting process which main CPU performs. It is a subroutine flow chart which shows the processing procedure which transmits the program for sub CPUs. It is a flowchart which shows the processing procedure of the decoding which sub CPU performs. It is a flowchart which shows the process sequence of the encoding which sub CPU performs. It is a flowchart which shows the process sequence of the image reduction which a sub CPU performs. It is a flowchart which shows the processing procedure of the line voltage monitor which sub CPU performs. It is a flowchart which shows the process sequence of the communication time measurement which sub CPU performs. It is a flowchart which shows the processing procedure of main CPU monitoring which sub CPU performs. It is a flowchart which shows the processing procedure of ring detection + power supply control which sub CPU performs. It is a flowchart which shows the processing procedure of 1300 Hz tone detection + power supply control which sub CPU performs. Sub CPU executes V. 23 is a flowchart illustrating a processing procedure of detection + power control.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the drawings, elements having the same function are denoted by the same reference numerals, and redundant description will be omitted. Further, since the drawings are for describing the embodiments of the present invention to the last, the dimensions and ratios of each member are exaggerated or simplified for the convenience of the description, and are different from the actual dimensions and ratios.

  As an information processing apparatus according to an embodiment to which the present invention is applied, an MFP (multifunction peripheral) having functions such as a printer, a copier, a scanner, and a facsimile will be described as an example. The MFP may be referred to as a multifunction peripheral or the like.

  FIG. 1 is a block diagram for explaining the configuration of the MFP in the embodiment.

  The MFP 10 has a multiprocessor configuration including a main CPU 100 and a sub CPU 200. Connected to the main CPU 100 is a RAM (Random Access Memory) 121 exclusively used by the main CPU 100. Similarly, the sub CPU 200 is also connected to a RAM 221 exclusively used by the sub CPU 200.

  The main CPU 100 performs control of the entire MFP 10 and control for executing each function when each function such as each printer, copy, scanner, or facsimile is selected.

  The main CPU 100 has a display unit 112, an operation unit 113, an image processing unit 114, a communication control unit 115, a modem 116 and an NCU (Network Control Unit) 117, a reading unit 118, a print engine 119, and a main via the main CPU bus 150. It is connected to a CPU ROM (Read Only Memory) 120, a main CPU RAM 121, a non-volatile memory 122, a power control unit 123, and a network communication unit 124. Further, a sub CPU communication unit 130 for communicating with the sub CPU 200 is connected to the main CPU bus 150.

  The display unit 112 includes a display panel such as a liquid crystal display or an organic EL (electroluminescence) display. The display panel displays various screens such as an operation screen, a setting screen, and an editing screen.

  The operation unit 113 includes, for example, buttons and keys for selecting the copy, scanner, and facsimile functions, a numeric keypad for inputting numerical values, a start key, a stop key, and the like. Further, the display unit 112 and the operation unit 113 may be a touch panel in which they are integrated.

  The image processing unit 114 performs image processing such as correction, rotation, enlargement, and reduction of image data. In addition, rasterization of image data received from the external device 300 is also performed. The image data of the facsimile is subjected to processing such as compression (encoding) and decompression (decoding) of the image data. Here, the external device 300 is, for example, a personal computer (PC), a server, a portable information terminal, etc. (The portable information terminal is, for example, a mobile phone, a smartphone, a tablet, etc.).

  The communication control unit 115 performs protocol control and the like related to facsimile communication. Therefore, the communication control unit 115 controls transmission and reception of data via the modem 116.

  The modem 116 modulates and demodulates digital signals for transmission as analog signals. The modem 116 may cause the main CPU 100 to execute a program for implementing the function of the modem as a software modem. The NCU 117 is connected to a telephone line to control and detect a call or call. The NCU 117 is controlled by the modem 116. Here, it is mainly used for making and receiving a call at the time of facsimile.

  The reading unit 118 is a so-called scanner that optically reads an original image and acquires image data.

  The print engine 119 performs so-called printing in which an image based on image data is formed on a recording sheet by a known electrophotographic process. The print engine may be an inkjet type.

  The main CPU ROM 120 is a ROM dedicated to the main CPU, and stores various programs and fixed data for carrying out basic operations in the MFP 10. The main CPU 100 executes various processes in accordance with these programs.

  The main CPU RAM 121 is a RAM dedicated to the main CPU, and serves as a work area when the main CPU 100 executes a program. It also temporarily stores image data. Therefore, the main CPU RAM 121 is used when temporarily storing image data read by the reading unit 118 at the time of copying, image data of a job received from the external apparatus 300, image data received by facsimile, and the like.

  The non-volatile memory 122 stores image data of a document read by the reading unit 118, image data of a job received from the external apparatus 300, image data received by facsimile, and the like. Further, application programs (programs other than the programs stored in the main CPU ROM) executed by the main CPU 100 are also stored.

  The non-volatile memory 122 also stores a program to be executed by the sub CPU 200. Therefore, the non-volatile memory 122 is a sub CPU program storage unit that stores a program executed by the sub CPU 200. As the non-volatile memory 122, for example, a hard disk drive (HDD), a solid state drive (SSD) using flash memory, or the like is used.

  The non-volatile memory 122 is used, for example, for storing image data at the time of copying, and storing a print job (and image data included in the job) from an external apparatus.

  Here, output means facsimile output via the communication control unit 115, the modem 116 and the NCU 117, and print output by the print engine 119.

  The power control unit 123 controls power supply to each unit according to an instruction from the main CPU 100 and the sub CPU 200. As power control, there are, for example, a normal mode and an energy saving energy mode (hereinafter referred to as energy saving mode) (also referred to as a sleep mode). In the normal mode, power is supplied to each part, and each function can be immediately executed. In the energy saving mode, among the units connected by the main CPU 100 and the bus 150, a portion detecting the start of user operation (input from the operation unit 113), a portion detecting an incoming call (voltage fluctuation of the telephone line), Further, the power supply to parts other than the part that detects the input of the job from the external device 300 is stopped. Specifically, in the present embodiment, when the energy saving mode is entered, input detection and incoming call detection are performed by the sub CPU 200 (described in detail later). Therefore, the power supply to each unit other than the operation unit 113 and the NCU 117 connected by the main CPU 100 and the bus 150 is stopped. The sub CPU 200 does not stop the power supply from the power control unit 123 even when entering the energy saving mode.

  The MFP 10 normally enters the normal mode when the power is turned on. On the other hand, if there is no operation for a certain period of time and no incoming call, the energy saving mode is set to reduce power consumption. One of the main CPU 100 and the sub CPU 200 processes such control and instructs the power control unit 123, and the power control unit 123 switches the energization of each unit according to the command.

  The network communication unit 124 is connected to an external device 300 (for example, a personal computer, a server, a portable terminal, or the like) through a network 301 such as a LAN (Local Area Network). Then, image data and various other data are exchanged with the external device 300. Also, the external device 300 has, for example, a wireless communication function (for example, wireless LAN (WiFi (Wireless Fidelity)), short distance wireless communication (for example, Bluetooth (registered trademark)), etc.), and portable information using wireless communication as the external device 300. It may be possible to transmit and receive image data and the like with the terminal.

  The sub CPU communication unit 130 performs communication control for exchanging various data with the sub CPU 200. For example, the main CPU 100 and the sub CPU 200 are connected using a communication standard such as RS232C. In the present embodiment, in particular, it is used for communication when the program used by the sub CPU 200 is rewritten.

  A portion including the sub CPU communication unit 130 and connected to the main CPU 100 via the bus 150 is referred to as the main CPU 100 side.

  Next, the sub CPU 200 executes various processes by rewriting the program in the sub CPU RAM 221 from the main CPU 100.

  The sub CPU 200 is connected to the sub CPU ROM 220 and the sub CPU RAM 221 via the sub CPU bus 250. Further, a main CPU communication unit 230 for communicating with the main CPU 100 is connected to the sub CPU bus 250. Further, the sub CPU bus 250 is connected to the operation unit 113, the NCU 117, and the like, and a signal detection unit 240 for performing signal detection in these portions is connected. Furthermore, the power control unit 123 is also connected to the sub CPU bus 250, and the sub CPU 200 can issue a command directly to the power control unit 123 to enable return from the energy saving mode (described in detail later). .

  The sub CPU ROM 220 stores a previously fixed program that the sub CPU 200 executes. In the present embodiment, the minimum necessary program for writing and reading the program transmitted from the main CPU 100 to the sub CPU RAM 221 is stored.

  The sub CPU RAM 221 is dedicated to the sub CPU 200, and stores programs executed by the sub CPU 200. Therefore, the sub CPU RAM 221 becomes a sub CPU storage unit. The sub CPU RAM 221 is a work area used by the sub CPU 200. Since the sub CPU RAM 221 is dedicated to the sub CPU 200, the sub CPU 200 performs writing and reading of data to the sub CPU 200. Therefore, even if the program is sent from the main CPU 100 to be executed by the sub CPU 200, the sub CPU 200 itself writes the sub CPU RAM 221 once.

  The main CPU communication unit 230 is a communication control unit on the sub CPU 200 side corresponding to the sub CPU communication unit 130 on the main CPU 100 side. Therefore, the main CPU 100 and the sub CPU 200 are connected using a communication standard such as RS232C.

  A portion including the main CPU communication unit 230 and connected to the sub CPU 200 via the bus 250 is referred to as a sub CPU 200 side.

  The connection between the main CPU 100 and the sub CPU 200 is not limited to the communication standard such as RS232C, but may be another communication standard. Further, the connection between the main CPU 100 and the sub CPU 200 may not be communication, and the main CPU 100 and the sub CPU 200 may be connected to one bus to directly exchange data via the bus. In addition, a RAM shared by the main CPU 100 and the sub CPU 200 may be provided, and data may be exchanged via the RAM (for example, data written by the main CPU may be read by the sub CPU).

  The signal detection unit 240 mainly functions in the energy saving mode, and detects a voltage change due to an input from the operation unit 113, detects a signal upon arrival at the NCU 117 (line voltage change), monitors a line, etc. Used for The signal detection unit 240 includes, for example, an analog-digital converter, and converts an analog signal into a digital signal. Thus, the sub CPU 200 can monitor voltage fluctuations and signals of signal lines connected to the operation unit 113 and the NCU 117.

  The operation of the MFP 10 in the first embodiment will be described.

  First, the basic operation will be described.

  A plurality of programs to be executed by the sub CPU 200 are stored in the non-volatile memory 122 which the main CPU 100 manages and directly accesses. The program to be executed by the sub CPU 200 is a program necessary for causing the sub CPU 200 to execute a specific function in accordance with a state change or setting of the MFP 10. Then, main CPU 100 selects a necessary program in accordance with a change in the state of MFP 10 at that time (specifically, a change in the state of main CPU 100) and a setting from among a plurality of stored programs. The selected program is transmitted from the main CPU 100 to the sub CPU 200.

  The transmitted program is written to the sub CPU RAM 221. Before storing the program transmitted at this time, the program which has been in the sub CPU RAM 221 from before is erased. This is because the capacity of the sub CPU RAM 221 is limited, and a plurality of programs can not be stored. Therefore, storing the program in the sub CPU RAM 221 is to rewrite the program.

  The timing of program transmission is, for example, when a state change occurs or when the setting is changed. This includes an operation of transmitting a program when a certain state is reached based on preset contents. The sub CPU 200 executes the program written in the sub CPU RAM 221.

  As a specific operation example, two operation examples will be described taking a facsimile function as an example.

  First, as the operation example 1, a case will be described where facsimile reception is performed by detection of an incoming signal in the energy saving mode after the setting change to the car (CAR) and the number display number (V. 23) and power control. . FIGS. 2 to 5 are explanatory diagrams for explaining the operation example 1. FIG. In the figure, only the part related to this operation example 1 is shown in the configuration of the MFP 10 already described, and the other parts are omitted.

  First, as shown in FIG. 2, a plurality of programs to be executed by the sub CPU 200 are stored in the non-volatile memory 122 which the main CPU 100 directly accesses. The programs exemplified here are Program A: Decoding Program, Program B: Coding Program, Program C: Ring (Ring) Detection + Power Supply Control Program, Program D: V.2. 23 detection + power supply control program, program E: 1300 Hz tone detection + power supply control program. These programs are assigned IDs such as program names, identification codes, and identification numbers.

  Here, for ring detection, car (CAR) detection, 1300 Hz tone detection, etc., monitor voltage changes and signals flowing on the communication line without grasping the communication line (telephone line for facsimile). It is done by This is called incoming call monitoring. Voltage change (voltage measurement) and signal monitoring are performed via the signal detection unit 240.

  In addition, the number display is done by monitoring the telephone line. At that time, in order to realize a soft modem by sub CPU 200, V. V. 23 included in the detection program. 23 A decoding program is executed.

  The power supply control by the power supply control program is to enter the energy saving mode or to return from the energy saving mode to the normal mode after the lapse of a predetermined time determined in advance.

  In the energy saving mode, the power control unit 123 stops the power supply to areas other than the minimum necessary area on the main CPU 100 side. On the other hand, to return to the normal mode, the power supply to the units including the main CPU 100 is resumed by detecting a signal for facsimile or detecting an input from the operation unit 113. Monitoring the presence or absence of an input from the operation unit 113 is referred to as operation monitoring. Incoming call monitoring and operation monitoring are combined and called incoming call operation monitoring.

  The programs to be executed by the sub CPU 200 may be various other programs. For example, various functions such as image reduction, line voltage monitoring, communication time measurement, and main CPU monitoring can be implemented. The MFP 10 further includes a network communication unit 124 as shown in FIG. Therefore, the program executed by the sub CPU 200 may be transmitted from the external device 300 via the network communication unit 124 and stored in the non-volatile memory 122. Thereby, variations of the sub CPU program can be increased.

  The state of FIG. 2 shows the state of the normal mode. That is, the main CPU 100 is in a state of being activated. In this state, the program C: ring detection + power control program is stored as a program to be executed by the sub CPU 200 (it is a program not shown but stored in the sub CPU RAM 221. The same applies hereinafter). . Therefore, the sub CPU 200 monitors the incoming call by the ring detection program and monitors the operation by the power control program.

  It is assumed that the setting change is performed from this state. It is assumed that the change contents are set and changed to the power control when the number display is displayed (V.23 detection). The program to be executed by the sub CPU 200 due to this setting change is a program C to a program D: V. 23 detection + rewriting to the power control program. FIG. 3 shows a state after the program to be executed by the sub CPU 200 has been rewritten by this setting change.

  When a predetermined time elapses from the state of FIG. 3, as shown in FIG. 4, the sub CPU 200 cuts off the power supply to the main CPU 100 side to the power control unit 123 by the power control function of the program D being executed. To command. By this, it will be in energy saving mode. That is, the main CPU 100 is in the energy saving mode. The operation to enter the energy saving mode here transmits the command to the main CPU 100 via the main CPU communication unit 230 and the sub CPU communication unit 130. The main CPU 100 that has received this command performs processing necessary before entering the energy saving mode, for example, processing such as saving data temporarily stored in the main CPU RAM 121 to a non-volatile memory. Further, in the present embodiment, the program for the sub CPU is also rewritten before the energy saving mode is entered (details will be described later).

  When the process before entering the energy saving mode is finished, the main CPU 100 instructs the power control unit 123 to enter the energy saving mode, and the power supply to each part is stopped.

  In this energy saving mode, the sub CPU 200 performs incoming call operation monitoring (car (CAR), number display number (V. 23) detection, and operation monitoring) in place of the main CPU 100. When this incoming call monitoring is performed, it is also possible to operate the incoming call rejection program together. The incoming call rejection number is managed by the main CPU 100 and stored in the non-volatile memory 122. Therefore, when the incoming call rejection is performed, the incoming call rejection number is transmitted from the main CPU 100 to the sub CPU 200 so that the sub CPU 200 can temporarily use it. Information temporarily used by the sub CPU 200 like this incoming call rejection number is called incidental information. The incidental information is sent to the sub CPU 200 together with the program executed during the energy saving mode. The accompanying information is written to the sub CPU RAM 221.

  When the incoming call rejection is performed, if there is an incoming call from the incoming call rejection number during the incoming call monitoring, the sub CPU 200 detects it and performs the incoming call rejection. The functions that can be executed by the sub CPU 200 differ depending on the capacity of the sub CPU RAM 221. That is, if the capacity of the sub CPU RAM 221 permits, it is possible to store a plurality of programs for causing the sub CPU 200 to execute a plurality of functions or a single program for executing a plurality of functions.

  Then, in the energy saving mode, if there is an incoming call, as shown in FIG. 5, the sub CPU 200 directly supplies power to the main CPU 100 to the power control unit 123 by the power control function of the program D being executed. Command to resume. This will return to the normal mode.

  Then, the sub CPU 200 transmits the number display number acquired from the line to the main CPU 100. The main CPU 100 displays the number display number. Then, the main CPU 100 rewrites the program to be executed by the sub CPU 200 into the program A: decryption program due to the change of the state of the main CPU 100 from the stop state to the start state at the same time as the start. The main CPU 100 causes the sub CPU 200 to decode facsimile data received via the modem 116. The decoded data is sent back to the main CPU 100, and image formation of the received facsimile data is performed.

  As described above, in the operation example 1, it is possible to cause the sub CPU 200 to monitor the incoming call of the facsimile in the energy saving mode and to perform the decryption process after returning the main CPU 100 to the normal mode by the incoming call.

  Next, an operation example 2 will be described in which the facsimile transmission is performed by the operator instead of the facsimile reception based on the detection of the incoming call signal during the energy saving mode after the 1300 Hz detection silent ring arrival and the setting change to the power control. Do. 6 to 9 are explanatory diagrams for explaining the operation example 2. FIG. In the drawing, only the part related to this operation example 2 is shown in the configuration of the MFP 10 already described, and the other parts are omitted.

  Operation Example 1 Similarly, as shown in FIG. 6, in the non-volatile memory 122 directly accessed by the main CPU 100, for example, program A: decoding program, program B: encoding program, program C: ring (Ring) detection + power control Program, Program D: V.I. 23 detection + power supply control program, program E: 1300 Hz tone detection + power supply control program is stored. Of course, various programs may also be stored in this operation example 2 as well.

  The state of FIG. 6 shows the state of the normal mode. In this state, the program C: ring detection + power control program is stored as a program to be executed by the sub CPU 200 (it is a program not shown but stored in the sub CPU RAM 221. The same applies hereinafter). (Same as the operation example 1).

  It is assumed that the setting change is performed from this state. It is assumed that the changed contents are changed to 1300 Hz ringing-free incoming and power control. Based on this setting change, the program to be executed by the sub CPU 200 is rewritten from program C to program E: 1300 Hz tone detection + power control program. FIG. 7 shows a state after the program to be executed by the sub CPU 200 has been rewritten by this setting change.

  When a predetermined time elapses from the state of FIG. 7, as shown in FIG. 8, the sub CPU 200 cuts off the power supply to the main CPU 100 to the power control unit 123 by the power control function of the program E being executed. To command. As a result, the energy saving mode is entered (in the actual operation, when the command is transmitted to main CPU 100 via main CPU communication unit 230-sub CPU communication unit 130 as in the description of FIG. 4 of operation example 1). After the main CPU 100 performs the necessary processing, the power control unit 123 is instructed to turn off the power supply on the main CPU 100 side, the power supply to each unit is stopped, and the energy saving mode is established.

  In this energy saving mode, the sub CPU 200 performs incoming call operation monitoring (1300 Hz tone detection + operation monitoring) in place of the main CPU 100.

  Subsequently, in the energy saving mode, if there is an input from the operation unit 113, as shown in FIG. 9, the sub CPU 200 supplies power to the main CPU 100 to the power control unit 123 by the power control function of the program E being executed. Command to resume supply. This will return to the normal mode.

  Then, the main CPU 100 rewrites the program to be executed by the sub CPU 200 into program B: an encoding program due to the fact that the state of the main CPU 100 changes from being stopped to being started with the activation. The main CPU 100 causes the sub CPU 200 to code the input facsimile data. The encoded data will be sent back to the main CPU 100, and will be transmitted to the outside via the modem 116 as facsimile data.

  As described above, in the operation example 2, the sub CPU 200 is made to perform the operation monitoring of the operation unit 113 together with the incoming call monitoring of the facsimile in the energy saving mode, and restore the main CPU 100 to the normal mode by the input from the operation unit 113. After that, the sub CPU program can be rewritten to perform code processing.

  Next, the processing procedure of program rewriting to the sub CPU 200 will be described. Here, processing procedures for performing the operations of the operation examples 1 and 2 will be described.

  FIG. 10 is a flowchart showing the processing procedure of the entire program rewriting process executed by the main CPU 100.

  First, the main CPU 100 determines whether or not the program to the sub CPU 200 has been transmitted at startup (including power-on and return from the energy saving mode) (S101). Whether it has been transmitted or not is determined by confirming the transmitted flag performed in S105 described later.

  Here, if the program to the sub CPU 200 has been transmitted, the process proceeds to S108 (S101: YES). On the other hand, if the program to sub CPU 200 has not been transmitted (S101: NO), main CPU 100 determines whether or not the return factor is an incoming call (S102). The arrival at the return factor differs depending on the program executed by the sub CPU 200 before the return, and ring detection, 1300 Hz tone detection, V.V. 23 detection etc.

  If the return factor is an incoming call (S102: YES), the main CPU 100 selects a program A which performs decryption processing as a transmission program to be executed by the sub CPU 200 (S103). The program selected at the time of call return is previously determined by the user, and is stored in the non-volatile memory 122. Here, it is assumed that the incoming call return as the device state and the decryption program as the transmission program are set and set in advance. The setting contents can be arbitrarily changed by the user. The setting content is stored in the non-volatile memory 122 as stored even if the power of the MFP 10 is turned off.

  Subsequently, the main CPU 100 transmits the selected program to the sub CPU 200 (S104). The transmission of this program is transmission while synchronizing with the sub CPU 200. The processing procedure of this transmission will be described later.

  Subsequently, the main CPU 100 sets a transmission completion flag (S105). The transmitted flag will be stored in the non-volatile memory 122. The reason is that even if the power of the MFP 10 is turned off, the state of the flag is stored. As a result, the state of the transmitted flag can be read out at startup in S101.

  In S102, if the return factor is not an incoming call, the main CPU 100 subsequently determines whether the incoming factor is an operation return (S106). Then, the main CPU 100 selects a program B which is a program that performs encoding processing as a transmission program (S107). After that, the main CPU 100 advances the process to S104. The program selected at the time of operation return is previously determined by the user, and is stored in the non-volatile memory 122. Here, the operation return is stored as the device state, and the encoding program is stored as a set as the transmission program.

  Subsequently, in S108, the main CPU 100 determines whether or not there is an incoming call change (S108). The incoming call change is a change in setting of the incoming call mode, and the sub CPU 200 side is rewritten to a program for realizing the corresponding function according to the setting. This setting is also preset and stored in the non-volatile memory 122. Of course, the user can set it arbitrarily.

  If there is no change in the incoming call (S108: NO), the process proceeds to S111.

  On the other hand, if the incoming call change has been set (S108: YES), the main CPU 100 determines whether the changed contents are normal (S109), whether it is a number display (S121) or 1300Hz non-ringing incoming call (S131).

  If it is normal (S109: YES), program C: Ring (Ring) detection + power control program is selected as the transmission program. If not normal (S109: NO), the process proceeds to S121.

  If it is a number display (S121: YES), as a transmission program, program D: V. 23 Select detection + power control program. If it is not a number display (S121: NO), it will progress to S131.

  If it is a 1300 Hz non-ringing incoming call (S131: YES), program E: 1300 Hz tone detection + power control program is selected as a transmission program. If it is not a 1300 Hz silent ring incoming call (S131: NO), there is no incoming call change, so the process proceeds to S111.

  Subsequently, the main CPU 100 determines whether the time for entering the energy saving mode has elapsed (S111). Here, when the time without any input has passed the time for entering the energy saving mode determined in advance (S111: YES), the selected program is transmitted to the sub CPU 200 (S112). Subsequently, the main CPU 100 instructs the power control unit 123 to stop the power supply to the main CPU 100 in order to shift to the energy saving mode (S113). After this procedure is completed, the energy saving mode is entered.

  On the other hand, if the time to enter the energy saving mode has not elapsed in S111, the process returns to S108, and the subsequent processing is continued. Therefore, it means that the incoming call change (setting change) is accepted until the energy saving mode is entered.

  Next, the processing procedure for transmitting the sub CPU program in S104 and S112 will be described. FIG. 11 is a subroutine flowchart showing a processing procedure for transmitting the sub CPU program. Here, the main CPU 100 and the sub CPU 200 synchronize and rewrite the program of the sub CPU RAM 221. Therefore, FIG. 11 shows the processing procedure of both the main CPU 100 and the sub CPU 200 (the broken arrows in FIG. 11 indicate the relationship of processing timing between the main CPU 100 and the sub CPU 200).

  First, at this time (S200), the main CPU 100 collates the program to be transmitted with the program already transmitted to the sub CPU 200 (S200). This is confirmed by the program name and ID stored in S205 described later. If the program to be transmitted is the same as the transmitted program, the process directly returns to the main routine S104 or S112 (returns to the step before entering this processing procedure). The waste of time which transmits the same thing can be saved by this step of S200. However, the step of S200 may not be necessary. The reason is that even if the same program is transmitted and rewritten, there is no problem in the operation.

  If the result of the check in S200 is that the program to be transmitted is different from the program already transmitted, the main CPU 100 subsequently transmits a program rewrite command to the sub CPU 200 (S201). After transmitting the rewrite command, the main CPU 100 waits until the rewrite preparation OK is received (S202).

  The sub CPU 200 determines whether a program rewrite command has been received (S301). If it is not received (S301: NO), it becomes a reception standby. If the sub CPU 200 receives the program rewrite command (S301: YES), it changes to the program rewrite mode (S302). The program rewrite mode is an operation of rewriting a program that the sub CPU RAM 221 operates.

  Subsequently, when the sub CPU 200 is ready for program rewriting, the sub CPU 200 transmits preparation OK to the main CPU 100 (S303). The preparation for program rewriting is, for example, processing for enabling immediate storage of the program transmitted at this stage (this processing may include processing for erasing the program in the sub CPU RAM 221). After transmitting the program rewrite preparation OK, the sub CPU 200 is in a standby state for a program or the like transmitted from the main CPU 100 (S304).

  When the main CPU 100 receives the rewrite preparation OK (S202: YES), the program to be executed by the sub CPU 200, the checksum of the program, and the transmission of these, sequentially transmit a completion signal indicating transmission completion (S203). After transmitting the program and the like, the main CPU 100 waits until the rewrite result is received from the sub CPU 200 (S204).

  When the sub CPU 200 receives the program, the checksum of the program, and the completion signal from the main CPU 100 (S 304: YES), they are stored, the checksum of the stored program is calculated, and the transmitted checksum It collates (S305).

  Subsequently, if the check result of the checksum is OK (S306: YES), the sub CPU 200 transmits rewrite OK to the main CPU 100 (S307), and deletes the old program in the sub CPU RAM 221 (not shown). After that, it is rewritten to the received program so that it can be executed after rebooting. Thereafter, the sub CPU 200 reboots itself (S309), and the processing of the sub CPU 200 ends. The reboot causes the sub CPU 200 to operate according to the program stored in S305.

On the other hand, if the check result of the checksum does not match (S306: NO), the rewrite NG is transmitted to the main CPU 100 (S308). Thereafter, the sub CPU 200 ends the processing.
In this case, since the old program in the sub CPU RAM 221 is not erased, the program before rewriting remains.

  The main CPU 100 that has received the rewrite result from the sub CPU 200 (S 204: YES) stores what the program of the sub CPU 200 is according to the received result (S 205). If the rewrite result from the sub CPU 200 is OK, the program to be executed by the sub CPU 200 at this time is the program transmitted in S203 (that is, the program selected in any of S103, S107, S110, S122, and S132). In S205, the name of the transmitted program, the program ID and the like are stored as a program to be executed by the sub CPU 200.

  The non-volatile memory 122 stores the program name or ID according to the rewriting result or that the program is not written. Therefore, the non-volatile memory 122 is a rewritten program storage unit storing the name of the transmitted program, the program ID, and the like.

  If the rewrite result is NG, the process may return to S201 again to execute the program rewrite. In this case, if the number of times of retrials is impossible, for example, by determining the number of times of retrial, the rewrite result is determined as NG.

  After the processing of S205, the main CPU 100 returns the processing to S104 or S112 of the main routine (returns to the step before entering this processing procedure).

  Thus, the rewriting of the program to the sub CPU 200 is completed.

  According to the processing procedure described above, as in the operation examples 1 and 2 described above, it is possible to cause the sub CPU 200 to execute various processing according to the state change and the setting change of the main CPU 100.

  Next, an example of processing procedures for various programs in the sub CPU 200 will be described.

  The processing procedure of decryption executed by the sub CPU 200 will be described. This processing is executed by the sub CPU 200 when the main CPU 100 is activated. FIG. 12 is a flowchart showing the processing procedure of decoding that the sub CPU 200 executes.

  The sub CPU 200 receives the codec type and received data from the modem 116 in buffer size units (S501).

  Subsequently, the sub CPU 200 decodes it according to the transmitted codec method, and transmits it to the main CPU 100 line by line (S 502).

  Subsequently, the sub CPU 200 determines whether or not it is the final data, and returns to S501 to perform decoding until the final data is obtained (S503: NO). When the decoding of the final data is completed (S503: YES), all the data is transmitted to the main CPU 100 (S504). Thereafter, the process ends. Note that all data in step S504 means that all unsent data are transmitted at this point in time because transmission is performed in line units in step S502.

  The processing procedure of encoding executed by the sub CPU 200 will be described. This processing is executed by the sub CPU 200 when the main CPU 100 is activated. FIG. 13 is a flow chart showing the processing procedure of encoding which the sub CPU 200 executes.

  The sub CPU 200 receives the codec type and transmission data from the main CPU 100 in buffer size units (S601).

  Subsequently, the sub CPU 200 encodes it by the transmitted codec method, and transmits it to the main CPU 100 in buffer units (S602).

  Subsequently, the sub CPU 200 determines whether or not the final data is designated, and returns to S601 and performs encoding until the final data is designated (S603: NO). If the final data is specified, the encoding is completed (S603: YES), and all data are transmitted to the main CPU 100 (S604). Thereafter, the process ends. Note that all data in step S604 means transmitting in units of buffer size in step S602, so that all unsent data are transmitted at this time.

  A processing procedure of image reduction performed by the sub CPU 200 will be described. This processing is executed by the sub CPU 200 when the main CPU 100 is activated. FIG. 14 is a flowchart showing the image reduction processing procedure executed by the sub CPU 200.

  The sub CPU 200 receives the pre-reduction image data from the main CPU 100 in buffer size units (S701).

  Subsequently, the sub CPU 200 performs reduction in the main scanning direction with the transmitted size and resolution, and performs line thinning in the sub scanning direction, and transmits it to the main CPU 100 in buffer size units (S702).

  Subsequently, the sub CPU 200 determines whether or not final data is designated, and returns to S701 to perform image reduction until the final data is designated (S703: NO). If the final data is specified, the image reduction is completed (S703: YES), and all the reduced data are transmitted to the main CPU 100 (S704). Note that all data in step S704 means that all unsent data are transmitted at this point in time since transmission is performed in buffer size units in step S702.

  The processing procedure of the line voltage monitor executed by sub CPU 200 will be described. This process is performed when the main CPU 100 is activated and is executed by the sub CPU 200 at the time of facsimile transmission / reception. FIG. 15 is a flow chart showing the processing procedure of the line voltage monitor that the sub CPU 200 executes. The line voltage monitor is a process for detecting an error of a line for transmitting and receiving a facsimile.

  The sub CPU 200 monitors the line voltage during communication line acquisition via the signal detection unit 240 (S801).

  Subsequently, the sub CPU 200 records the time and the measured value (line voltage value) which is the monitoring result during monitoring (S802).

  Subsequently, after the communication is completed, the sub CPU 200 transmits the measurement result to the main CPU 100 (S803). Thereafter, the process ends.

  A processing procedure of communication time measurement performed by sub CPU 200 will be described. This process is performed when the main CPU 100 is activated and is executed by the sub CPU 200 at the time of facsimile transmission / reception. FIG. 16 is a flowchart showing a processing procedure of communication time measurement executed by the sub CPU 200. Communication time measurement is a process of measuring the communication time at the time of transmission and reception of a facsimile.

  The sub CPU 200 measures the communication time by measuring the line voltage (line capture, release) via the signal detection unit 240 (S901). It is determined that communication is in progress if the line voltage is higher than (or lower than) a predetermined value.

  Subsequently, the sub CPU 200 records the time and the measurement value (communication time) which is the monitoring result during monitoring (S902).

  Subsequently, after the communication is completed, the sub CPU 200 transmits the measurement result to the main CPU 100 (S903). Thereafter, the process ends.

  The processing procedure of the main CPU monitoring executed by the sub CPU 200 will be described. This processing is processing for detecting an error of the main CPU 100 when the main CPU 100 is activated. FIG. 17 is a flowchart showing the processing procedure of the main CPU monitoring that the sub CPU 200 executes.

  The sub CPU 200 periodically sends a signal to the main CPU 100 and monitors the response thereto (S1001).

  Subsequently, if there is no response, the sub CPU 200 transmits a fixed text to the administrator PC and notifies (S1002). Here, the administrator PC is a predetermined PC or the like. Note that, instead of this notification, for example, the occurrence of a failure may be displayed on display unit 112 of MFP 10. However, in this case, the display unit 112 or the network communication unit 124 of the MFP 10 needs to leave control from the main CPU 100 to perform display or network communication only in special cases such as occurrence of a failure. . For example, in a mode in which the main CPU 100 and the sub CPU 200 are directly connected by the same bus, a warning display or warning message is displayed via the display unit or the network communication unit in which the sub CPU 200 is connected by the bus instead of the failed main CPU 100. You may send it.

  A processing procedure of ring detection + power control performed by sub CPU 200 will be described. This process is a process executed by the sub CPU 200 when the main CPU 100 is in the energy saving mode. FIG. 18 is a flow chart showing a processing procedure of ring detection + power control which the sub CPU 200 executes.

  The sub CPU 200 monitors the line voltage and the cadence of the incoming signal via the signal detection unit 240, and determines whether it is a ring signal (S1101).

  Subsequently, when the sub CPU 200 detects the predetermined number of times, the sub CPU 200 activates the main CPU 100 (power supply to the main CPU 100) (S1102). Thereafter, the process ends.

  A processing procedure of 1300 Hz tone detection + power control performed by sub CPU 200 will be described. This process is a process executed by the sub CPU 200 when the main CPU 100 is in the energy saving mode. FIG. 19 is a flow chart showing a processing procedure of 1300 Hz tone detection + power control which the sub CPU 200 executes.

  The sub CPU 200 monitors the tone signal on the line through the signal detection unit 240, and determines whether it is a 1300 Hz signal (S1201).

  Subsequently, if the 1300 Hz signal has a predetermined format, the sub CPU 200 activates the main CPU 100 (power supply to the main CPU 100) (S1202). Thereafter, the process ends.

  Sub CPU 200 executes V. A processing procedure of the 23 detection (corresponding to the number display) + power control will be described. This process is a process executed by the sub CPU 200 when the main CPU 100 is in the energy saving mode. FIG. 20 shows the V.V. 23 is a flowchart illustrating a processing procedure of detection + power control.

  The sub CPU 200 monitors the line voltage and the cadence of the incoming signal through the signal detection unit 240 to determine whether it is a car signal (S1301).

  Subsequently, the sub CPU 200 makes a primary response at the time of car detection, and the V.V. 23. A signal 23 is received (S1302).

  Subsequently, sub CPU 200 causes V.I. 23 Store the contents of the reception, and release the line after the reception is completed (S1303).

  Subsequently, the sub CPU 200 monitors the line voltage and the cadence of the incoming signal to determine whether it is a ring signal (S1304).

  Subsequently, when the sub CPU 200 detects the predetermined number of times, the sub CPU 200 activates the main CPU 100 (power supply to the main CPU 100) (S1305).

  Subsequently, the sub CPU 200 notifies the main CPU 100 of a reception signal (number display number) (S1306). Thereafter, the process ends.

  According to the embodiment described above, the following effects can be obtained.

  A plurality of programs to be executed by the sub CPU 200 are stored in the non-volatile memory 122 managed by the main CPU 100, and the programs to be executed by the sub CPU 200 are appropriately rewritten according to the state change or setting change of the main CPU 100. And As a result, the processing capacity of the sub CPU 200 can be effectively utilized regardless of the change of the hardware resource. This is particularly effective when the capacity of the storage device such as the RAM 221 managed by the sub CPU 200 is small. For example, when the sub CPU 200 performs only power control, the capacity of the storage device is small. In the present embodiment, even when the storage capacity is small, a program having a size corresponding to the small storage capacity is prepared, and the sub CPU 200 is made to work effectively by replacing the program according to the state change or the setting change. Can.

  Further, in the present embodiment, during facsimile communication, the sub CPU 200 is caused to take on part of the facsimile function by performing rewriting such as image reduction, encoding, and decoding to execute processing directly related to the facsimile. Can. Accordingly, the main CPU can perform image processing which can not be executed by the sub CPU 200 and rasterization for image formation.

  Further, in the present embodiment, the sub CPU 200 may rewrite and execute processing such as monitoring of the line voltage and the power supply voltage, monitoring of the main CPU 100, and the like that is not directly related to facsimile communication. Also in this case, the main CPU 100 can perform image processing, rasterization for image formation, and the like that can not be executed by the sub CPU 200 as the MFP 10.

  Further, in the present embodiment, when the sub CPU 200 performs signal monitoring in the energy saving mode, the program is rewritten to a program according to the signal to be monitored on the communication line according to the setting. Specifically, when the number display is valid, V. The power supply control of the main CPU 100 is performed with the demodulation function of 23. When the no-answer incoming call setting is effective, the demodulation function of the 1300 Hz tone and the power control of the main CPU 100 are performed. When both functions are OFF, ring detection and power control of the main CPU 100 are performed as a normal mode. Thus, various settings can be performed to realize an energy saving mode in accordance with the user's request. Furthermore, when the number display is valid, unnecessary incoming calls can be suppressed by simultaneously giving the sub CPU 200 a number (accompanying information) to reject incoming calls. Thus, since incoming call rejection can be performed only on the side of the sub CPU 200, the energy saving effect can be further enhanced.

  Although the embodiments have been described above, the present invention is not limited to these embodiments. In particular, although the rewriting of the program of the sub CPU 200 has been described using FIGS. 10 and 11, various programs not described in this description can be executed by the sub CPU 200. Also in this case, only the program to be rewritten is changed, and the rewriting procedure is the same.

  In the embodiment, the sub CPU RAM 221 is dedicated to the sub CPU 200, and the sub CPU 200 rewrites the program. However, instead of this, the main CPU 100 may directly access the sub CPU RAM 221, and the main CPU 100 may directly rewrite the program executed by the sub CPU 200.

  Besides, the present invention is defined by the contents described in the claims, and various modifications are possible.

10 MFPs,
100 main CPU,
112 display unit,
113 operation unit,
114 image processing unit,
115 communication control unit,
116 modems,
117 NCU,
118 reader,
119 print engines,
120 Main CPU ROM,
121 Main CPU RAM,
122 nonvolatile memory,
123 power control unit,
124 Network Communication Unit,
130 sub CPU communication unit,
150 Main CPU Bus,
200 sub CPUs,
220 sub CPU ROM,
221 Sub CPU RAM,
230 main CPU communication unit,
250 Bus for sub CPU.

Claims (12)

Main CPU and sub CPU that can operate individually,
A sub CPU storage unit storing a sub CPU program executed by the sub CPU;
A sub CPU program storage unit storing a plurality of sub CPU programs to be executed by the sub CPU;
The sub CPU program storage unit stores, as the sub CPU program, a program to be executed during an energy saving mode in which power supply to the main CPU is stopped and a program to be executed during startup of the main CPU. Has been
The main CPU is
When the state to shift to the energy saving mode is entered as the state of the main CPU, the program is rewritten as a program to be executed by the main CPU in the energy saving mode as the sub CPU program,
Wherein when in a state of returning from the energy saving mode as the state of the main CPU, information processor you wherein rewriting the program in which the main CPU executes during startup as a program for the sub-CPU. The program to be executed by the sub CPU during the energy saving mode by the main CPU includes at least a program for recovering the main CPU, and also a reception refusal program not receiving a facsimile or a reception monitoring program for facsimile.
The program executed while the main CPU is activated is at least one of a decryption processing program of received facsimile data, an encoding processing program of facsimile data to be transmitted, and an image reduction program of facsimile data. The information processing apparatus according to claim 1 . The main CPU, the main CPU with programs to be executed by the sub CPU in the energy-saving mode, according to claim 1 or 2 which also accompanying information the sub CPU is used and wherein it is stored in the storage unit for the sub CPU The information processing apparatus according to claim 1. The main CPU has a rewritten program storage unit that stores the sub CPU program stored by rewriting and storing the sub CPU storage unit,
When the sub CPU program stored in the sub CPU storage unit is rewritten, the main CPU rewrites the program when the program to be rewritten from now and the program stored in the rewritten program storage unit are the same. The information processing apparatus according to any one of claims 1 to 3 , which is not performed. Main CPU and sub CPU that can operate individually,
A sub CPU storage unit storing a sub CPU program executed by the sub CPU;
A sub CPU program storage unit storing a plurality of sub CPU programs to be executed by the sub CPU;
The main CPU selects the sub CPU program from the sub CPU program storage unit according to the state and setting contents when the state of the main CPU changes or when the setting is changed. And rewriting the sub CPU program stored in the sub CPU storage unit,
The main CPU has a rewritten program storage unit that stores the sub CPU program stored by rewriting and storing the sub CPU storage unit,
When the sub CPU program stored in the sub CPU storage unit is rewritten, the main CPU rewrites the program when the program to be rewritten from now and the program stored in the rewritten program storage unit are the same. An information processing apparatus characterized by not performing. The information processing apparatus is connected to an external apparatus by a network,
The information processing apparatus according to any one of claims 1 to 5, wherein the sub CPU program stored in the sub CPU program storage unit is stored from the external device. Main CPU and sub CPU that can operate individually,
A sub CPU storage unit storing a sub CPU program executed by the sub CPU;
A control method of an information processing apparatus, comprising: a sub CPU program storage unit storing a plurality of sub CPU programs to be executed by the sub CPU.
The sub CPU program storage unit stores, as the sub CPU program, a program to be executed during an energy saving mode in which power supply to the main CPU is stopped and a program to be executed during startup of the main CPU. Has been
When the state to shift to the energy saving mode is entered as the state of the main CPU, the program is rewritten as a program to be executed by the main CPU in the energy saving mode as the sub CPU program,
Wherein when in a state of returning from the energy saving mode as the state of the main CPU, the control method of the information processing apparatus you wherein rewriting the program in which the main CPU executes during startup as a program for the sub-CPU. The program to be executed by the sub CPU during the energy saving mode by the main CPU includes at least a program for recovering the main CPU, and also a reception refusal program not receiving a facsimile or a reception monitoring program for facsimile.
The program executed while the main CPU is activated is at least one of a decryption processing program of received facsimile data, an encoding processing program of facsimile data to be transmitted, and an image reduction program of facsimile data. The control method of the information processing apparatus according to claim 7 . The information processing according to claim 7 or 8 , wherein the main CPU stores a program to be executed by the sub CPU during the energy saving mode, and additional information used by the sub CPU in the storage unit for sub CPU. Device control method. It is stored what is the rewritten sub CPU program which has been rewritten and stored the sub CPU storage unit,
The control method of the information processing apparatus according to any one of claims 7 to 9 , wherein rewriting is not performed when the program to be rewritten from now on and the stored rewritten program are the same. Main CPU and sub CPU that can operate individually,
A sub CPU storage unit storing a sub CPU program executed by the sub CPU;
A control method of an information processing apparatus, comprising: a sub CPU program storage unit storing a plurality of sub CPU programs to be executed by the sub CPU.
When the state of the main CPU changes or when the setting is changed, the sub CPU program is selected from the sub CPU program storage unit according to the state and the setting content, and the sub CPU is selected. Rewriting the sub CPU program stored in the storage unit;
It is stored what is the rewritten sub CPU program which has been rewritten and stored the sub CPU storage unit,
A control method of an information processing apparatus characterized in that rewriting is not performed when a program to be rewritten from now on and the stored rewritten program are the same. The information processing apparatus is connected to an external apparatus by a network,
The control method of an information processing apparatus according to any one of claims 7 to 11, wherein the sub CPU program stored in the sub CPU program storage unit is stored from the external device.