JP5347311B2 - Circuit equipment - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a circuit device capable of operating multiple mounted circuits without exceeding permissible electric power consumption. <P>SOLUTION: Consumption currents of a plurality of drive circuits A-E mounted in an ASIC 1 and capable of operating in parallel to one another are respectively investigated in advance. A consumption current permitted in the entire ASIC 1 from permissible loss or the like related to a package is investigated in advance. When operation commands of the drive circuits A-E are given to the ASIC 1 from a microcomputer 51, a control circuit 10 determines whether or not the drive circuits A-E related to the operation commands can be operated based on: the consumption currents of the respective drive circuits A-E; the total permissible consumption current; and operation conditions of the respective drive circuits A-E. <P>COPYRIGHT: (C)2009,JPO&amp;INPIT

Description

  The present invention relates to a circuit device equipped with a plurality of circuits such as a drive circuit for driving a load mounted on a vehicle.

  An IC (Integrated Circuit) chip is often encapsulated in a synthetic resin package and mounted on a circuit board, and an allowable loss is defined for each IC chip package. The allowable loss is determined from the amount of heat generated when the circuit mounted on the IC chip is operated and the resistance to heat of the package. The generated heat amount is the amount of electricity consumed when the circuit is operated ( Therefore, the maximum power consumption of the circuit is limited by the allowable loss of the package.

  In recent years, with the development of semiconductor manufacturing technology, IC chips can be highly integrated and enlarged. Accordingly, a large number of circuits can be mounted on one IC chip, and a large number of functions can be provided on a single IC chip. However, as described above, since the maximum power consumption of the circuit is limited by the allowable loss of the package enclosing the IC chip, there is a problem that the number of circuits or the circuit scale that can be mounted on the IC chip is limited. .

  In recent years, the number of electronic devices mounted on vehicles tends to increase, and the electronic control of vehicles is progressing. Accordingly, a drive circuit for driving a load such as a motor or an actuator, a communication circuit for transmitting and receiving information between a plurality of devices, a power supply circuit for supplying power from the battery to each circuit, and accepting a user operation Therefore, various circuits such as a switch input processing circuit and a control circuit for controlling them are required. By mounting these various circuits on one chip, advantages such as a reduction in manufacturing cost and a reduction in circuit mounting space can be obtained, but there is a limit to one chip due to the above-described allowable loss of the package. In particular, since a drive circuit that drives a load such as a motor or an actuator consumes a large amount of power, it is difficult to mount a large number of drive circuits on one IC chip.

Patent Document 1 proposes a load driving device that can reliably suppress a intensive increase in load current when driving a plurality of loads. In this load driving device, for example, for three loads, the control circuit outputs a PWM (Pulse Width Modulation) signal so that there is no period of simultaneous driving. Specifically, the control circuit causes the delay circuit to change the phase of the common carrier signal by 1/3 of the period, and changes the output phase of the PWM signal equally according to the number of loads.
JP 2006-294694 A

  However, the load driving device described in Patent Document 1 is configured to uniformly change the output phase of the PWM signal by delaying the phase of the carrier wave signal, and is easily applied when driving about three loads. Yes, but it is difficult to apply when driving more loads. Further, since it is intended only for a drive circuit that outputs a PWM signal, it cannot be applied when various circuits are mounted on one chip.

  The present invention has been made in view of such circumstances, and an object of the present invention is to provide a circuit device capable of operating a large number of mounted circuits without exceeding an allowable amount of consumed electricity. Is to provide.

The circuit device according to the present invention is operated in parallel in a circuit device having a plurality of circuits that can be selectively operated, based on the total consumed electric energy and the consumed electric energy of each circuit. A storage unit that stores combinations of circuits that can be used; a determination unit that determines whether each circuit can be operated based on the combinations stored in the storage unit and the operation status of each circuit; and Circuit operation control means for operating the circuit in accordance with a determination result of the determination means.

In the present invention, for example, in the case of a circuit device having a configuration in which a plurality of drive circuits that respectively drive a plurality of loads such as motors or actuators mounted on a vehicle are integrated into one chip, the devices can be selectively operated in parallel. In a circuit device equipped with a plurality of possible circuits, the amount of electricity consumed (current consumption or power consumption, etc.) is examined for each of the plurality of circuits. In addition, from the allowable loss associated with the package, etc., the amount of consumed electricity allowed for the entire circuit device is examined.
When operating a circuit, a circuit device uses one circuit based on the amount of electricity consumed by each installed circuit, the total amount of electricity consumed, and the operating status of other mounted circuits. By operating, it is possible to check whether or not the amount of electricity consumed exceeds the allowable amount of electricity consumed, and whether or not the operation of one circuit can be determined. By controlling the operation start or operation standby of one circuit in accordance with the determination result, the circuit device can operate each circuit without exceeding the allowable amount of consumed electricity.

  In the present invention, a table shows a combination of a plurality of circuits that can be operated in parallel without exceeding the permissible power consumption based on the permissible total power consumption and the power consumption of each circuit. For example, it is stored in advance in the circuit device. When operating a circuit, the circuit device simply checks whether the combination of the one circuit and another circuit already in operation matches the combination stored in advance. It is possible to determine whether the operation is possible. Since the determination process can be simplified, an increase in the size of a control circuit or the like that controls the operation of each circuit can be suppressed.

The circuit device according to the present invention is mounted on a vehicle, the circuit apparatus having a plurality of circuits which can be operated selectively, and vehicle-state obtaining means for obtaining status of the travel of the vehicle, acceptable Storage means for storing a combination of circuits that can be operated in parallel based on the total consumed electricity amount and the consumed electricity amount of each circuit in association with the vehicle state acquired by the vehicle state acquiring unit; Determining means for determining whether each circuit can be operated based on the combination stored in the storage means, the operation status of each circuit, and the vehicle status acquired by the vehicle status acquiring means, and the determination Circuit operation control means for operating the circuit according to the determination result of the means.

In the present invention, the electric power consumption allowed for the entire circuit and the electric power consumption of each circuit are examined. In addition, the operation of each circuit is performed with respect to the vehicle state related to the traveling of the vehicle, such as whether the vehicle is traveling, whether the vehicle engine is operating, or whether the ignition key is installed. Whether to permit (or whether each circuit needs to be operated) is determined in advance.
When the circuit device operates one circuit, it can acquire the vehicle state and first determine whether or not the circuit can be operated. If the operation of one circuit is permitted for the vehicle state, the circuit device further determines the amount of electricity consumed by each circuit, the allowable amount of electricity consumed, and the operation status of other circuits. , Whether or not operation is possible for one circuit is determined. Thereby, the circuit device can operate each circuit appropriately according to the vehicle state without exceeding the allowable amount of consumed electricity.

  In the present invention, a combination of a plurality of circuits that can be operated in parallel without exceeding the permissible power consumption based on the permissible total power consumption and the power consumption of each circuit, It is stored in advance in the circuit device as a table or the like in association with the vehicle state. When operating a circuit, a circuit device can easily determine whether a combination of this one circuit and another circuit already in operation matches a combination according to the vehicle condition. It is possible to determine whether or not the circuit can operate. Since the determination process can be simplified, an increase in the size of a control circuit or the like that controls the operation of each circuit can be suppressed.

  The circuit device according to the present invention further includes a receiving unit that receives an operation instruction from the outside for each circuit, and an operation instruction storage unit that stores the operation instruction received by the receiving unit. The circuit according to the operation instruction is operated in the order in which the operation instruction storage means stores the operation instruction.

  In the present invention, the circuit device accepts and stores an operation instruction to each circuit given from an external device. The circuit device reads out the operation instructions received and stored in the order of storage, and determines whether the corresponding circuit is operable as described above, and operates in order when the operation becomes possible. This can be realized by storing operation instructions by a FIFO (First In First Out) method. As a result, the circuit device can reliably process the operation instructions given from the external device in the order of reception, and can reliably operate the plurality of circuits mounted on the circuit device.

  In the circuit device according to the present invention, the plurality of circuits include circuits that can be operated in a plurality of operating states with different amounts of electricity consumed, and the determination unit consumes a large amount of electricity. When it is determined that the circuit cannot be operated in an operating state, it is determined whether or not the circuit can be operated in an operating state with a small amount of electricity consumption. When the means determines that the circuit can be operated in an operating state with a small amount of electricity consumed, the circuit is operated in an operating state with a small amount of electricity consumed.

  In the present invention, the plurality of circuits mounted on the circuit device include circuits that can be operated in a plurality of operation states (operation modes) in which the amount of consumed electricity is different in two or more stages. In such a case, the circuit device can be operated in an operation mode with low power consumption even if it is determined that the circuit to be operated cannot be operated by the above-described determination. , One circuit is operated in an operation mode with low power consumption. Accordingly, the circuit device can operate more circuits in parallel without exceeding the allowable power consumption. Therefore, the circuit device can be equipped with more or a larger-scale circuit that exceeds the allowable amount of consumed electricity.

  In the case of the present invention, by configuring the circuit to determine whether or not to allow the operation of each circuit based on the allowable total electricity consumption, the consumed electricity amount of each mounted circuit, and the operation status of each circuit, Since the circuit device can perform processing by operating each circuit without exceeding the allowable amount of consumed electricity, the circuit device is equipped with a circuit having a number or scale exceeding the allowable amount of consumed electricity. be able to. Therefore, a large number of circuits can be integrated into one chip as a circuit device, and downsizing and cost reduction can be realized.

(Embodiment 1)
Hereinafter, the present invention will be specifically described with reference to the drawings showing embodiments thereof. FIG. 1 is a block diagram showing a configuration of a load driving system using a circuit device according to the present invention. In the figure, reference numeral 1 denotes an ASIC (Application Specific Integrated Circuit), which corresponds to the circuit device according to the present invention. The ASIC 1 includes a plurality of various circuits such as a control circuit 10, a load driving unit 20 having a plurality of driving circuits A to E, a communication circuit 31, a power supply circuit 32, and a switch (hereinafter abbreviated as SW) input processing circuit 33. Is manufactured as an IC chip mounted on one chip and enclosed in a synthetic resin package (not shown).

  The ASIC 1 applies a drive voltage or a drive current to a load 52 such as an actuator for locking and unlocking a vehicle door, a motor for operating a vehicle power window, and a motor for adjusting the angle of a vehicle door mirror, for example. A load driving unit 20 is provided. The load driving unit 20 includes a plurality of driving circuits A to E suitable for the plurality of loads 52 to be driven, and each driving circuit A to E can operate independently. The ASIC 1 drives the load 52 in accordance with an operation instruction given from the microcomputer 51 that controls the illustrated load driving system. The operation instruction given from the microcomputer 51 to the ASIC 1 is received by the control circuit 10 of the ASIC 1, and the control circuit 10 controls the operations of the drive circuits A to E of the load driving unit 20 in accordance with the operation instruction, whereby the ASIC 1 The load 52 is driven by the above.

  The microcomputer 51 is an IC equipped with a processing device such as a CPU (Central Processing Unit) or MPU (Micro Processing Unit) and a storage device such as a RAM (Random Access Memory) or ROM (Read Only Memory). For example, the microcomputer 51 and the ASIC 1 are mounted on a circuit board provided in an ECU (Electronic Control Unit) that controls various electronic devices of the vehicle, and are connected to each other by metal wiring or the like.

  The ASIC 1 is equipped with a communication circuit 31. The communication circuit 31 is a circuit for causing the microcomputer 51 to have a communication function. The microcomputer 51 does not have a communication function, and when data is transmitted / received to / from other ECUs or electronic devices mounted on the vehicle, communication is performed using the communication circuit 31 mounted on the ASIC 1. To do. The communication circuit 31 can transmit and receive data according to a communication protocol such as CAN (Controller Area Network), for example. When data is received from another ECU or an electronic device, the received data is given to the microcomputer 51. When transmission data is given from the microcomputer 51, this transmission data is transmitted to other ECUs or electronic devices.

  The ASIC 1 is equipped with a power circuit 32, and the power circuit 32 is connected to a battery 53 mounted on the vehicle via a power cable or the like, and power is supplied from the battery 53. The power supply circuit 32 converts, for example, 12V power supplied from the battery 53 into 5V power, and supplies the converted power to each circuit in the microcomputer 51 and the ASIC 1. In FIG. 1, only the power supply path from the battery 53 to the power supply circuit 32 and the power supply path from the power supply circuit 32 to the microcomputer 51 are shown, and the other power supply paths are not shown.

  The ASIC 1 is equipped with a SW input processing circuit 33. The SW input processing circuit 33 is a circuit that processes user inputs to various switches provided on an instrument panel or a door of the vehicle. The microcomputer 51 performs processing such as giving an operation instruction for driving the load 52 to the ASIC 1 according to a switch input by the user. The SW input processing circuit 33 is connected to various switches via cables and the like, performs processing for detecting user input to the switches, and notifies the microcomputer 51 of the detection results.

  For example, when the user operates a switch that locks the door, an input to the switch is detected by the SW input processing circuit 33 and notified to the microcomputer 51, and the microcomputer is used to drive a load 52 such as an actuator for locking the door. 51 gives an operation instruction to the ASIC 1. When the ASIC 1 to which the operation instruction is given operates the corresponding drive circuits A to E of the load drive unit 20, the corresponding load 52 is driven and the vehicle door is locked.

  Next, details of control of the drive circuits A to E by the control circuit 10 will be described. FIG. 2 is a block diagram showing a configuration of the control circuit 10 of the ASIC 1 according to the first embodiment of the present invention. The control circuit 10 includes a control unit 11, a reception unit 12, a storage unit 13, and the like. The microcomputer 51 supplies a 1-bit digital signal associated with each of the drive circuits A to E to the control circuit 10 of the ASIC 1 as an operation instruction. For example, in the operation instruction signal, the H (high) level of the potential is an instruction to operate the drive circuits A to E, and the L (low) level of the potential is associated with an instruction to not operate the drive circuits A to E. . The plurality of signals are given to the reception unit 12 of the control circuit 10, and the reception unit 12 detects a level change of the signal and notifies the control unit 11 of the change.

  The control unit 11 determines whether or not the drive circuits A to E can operate according to the notification from the reception unit 12 and outputs a drive signal to each of the drive circuits A to E based on the determination result. The drive signal output from the control unit 11 to each of the drive circuits A to E is a 1-bit digital signal. When the potential of the drive signal is H level, the drive circuits A to E drive the load 52 and L level. In this case, the load 52 is not driven. The control unit 11 determines whether the operation of the drive circuits A to E is possible based on the operation availability determination table 131 stored in the storage unit 13.

  The storage unit 13 is composed of a ROM, a rewritable nonvolatile memory element, or the like, and stores an operation availability determination table 131 determined in the design stage or manufacturing stage of the ASIC 1 in advance. FIG. 3 is a schematic diagram illustrating an example of the operation availability determination table 131. In FIG. 3, the ASIC 1 includes five drive circuits A to E, and a current of 50 mA is consumed by the operation of the drive circuit A, and a current of 150 mA is consumed by the operation of the drive circuit B. It is assumed that a current of 100 mA is consumed by the operation of C, a current of 200 mA is consumed by the operation of the drive circuit D, and a current of 300 mA is consumed by the operation of the drive circuit E. In addition, the current consumption allowed for the entire ASIC 1 (the load driving unit 20 thereof) is 300 mA.

  The current consumption of each of the drive circuits A to E is acquired in advance by a method such as calculating by simulation at the time of designing the ASIC 1, or actually measuring with a prototype or mass-produced ASIC 1. Note that the current consumption of each of the drive circuits A to E may be obtained in consideration of the usage environment (temperature, power supply voltage, etc.) of the ASIC 1 under the worst condition (environment with the largest current consumption). desirable. The current consumption allowed for the entire ASIC 1 can be acquired in advance from the allowable loss of the package of the ASIC 1. A combination of drive circuits A to E that can be operated simultaneously from the acquired current consumption of each drive circuit A to E and the current consumption allowed by the ASIC 1 (operation combinations 1, 2... Of the operation determination table 131). Can be determined in advance.

  For example, in the illustrated operation availability determination table 131, an operation combination 1 is a combination in which three drive circuits A, B, and C can be operated simultaneously. In the case of the operation combination 1, the current consumption becomes 50 mA + 150 mA + 100 mA = 300 mA by simultaneously operating the drive circuits A, B, and C, and the current consumption is within 300 mA allowed for the entire ASIC 1. Similarly, a combination that can operate two drive circuits A and D simultaneously is referred to as operation combination 2, and a combination that can operate two drive circuits C and D simultaneously is an operation combination. The combination that can operate only the drive circuit E is referred to as an operation combination 4.

  When the control unit 11 of the control circuit 10 receives an operation instruction from the microcomputer 51, the control unit 11 reads the operation availability determination table 131 from the storage unit 13, and operates the drive circuits A to E and the operation instruction. It is determined whether or not the combination with the drive circuits A to E that are required to be newly operated matches the operation combination stored in the operation enable / disable determination table 131. When the operation combination of the operation availability determination table 131 is matched, the control unit 11 outputs a drive signal to the drive circuits A to E related to the given operation instruction to operate. If the operation combination of the operation availability determination table 131 does not match, the control unit 11 does not operate the drive circuits A to E related to the operation instruction and returns an error signal to the microcomputer 51. 1 and 2, the error signal return path from the control unit 11 to the microcomputer 51 is not shown.

  For example, when the receiving unit 12 receives an operation instruction from the microcomputer 51 to the driving circuit C while the driving circuits A and B are operating, the control unit 11 determines whether the combination of the driving circuits A, B, and C is operable. Since it matches the operation combination 1 of the determination table 131, it is determined that the drive circuit C is operable, and a drive signal is output to the drive circuit C. For example, when the receiving unit 12 receives an operation instruction from the microcomputer 51 to the driving circuit D while the driving circuits A and B are operating, the control unit 11 operates the combination of the driving circuits A, B, and D. Since it does not match all combinations stored in the availability determination table 131, it is determined that the drive circuit D is not operable and an error signal is returned to the microcomputer 51. The microcomputer 51 that has received the error signal can perform processing such as giving an operation instruction again after waiting for a predetermined period.

  FIG. 4 is a flowchart showing the procedure of the operation control process performed by the control circuit 10 of the ASIC 1 according to the first embodiment of the present invention, which is a process performed by the control unit 11 of the control circuit 10. First, the control unit 11 checks whether or not the operation instruction from the microcomputer 51 is received by the reception unit 12 based on the presence or absence of a notification from the reception unit 12 (step S1). If the operation instruction is not received (S1) : NO), wait until an operation instruction is accepted. When the operation instruction from the microcomputer 51 is received (S1: YES), the control unit 11 reads the operation availability determination table 131 from the storage unit 13 (step S2).

  Next, the control unit 11 determines whether or not the combination of the driving circuits A to E in operation and the driving circuits A to E that have received the operation instruction matches the operation combination stored in the operation availability determination table 131. Check (step S3). When the operation combination of the operation availability determination table 131 is matched (S3: YES), the control unit 11 outputs a drive signal to the drive circuits A to E according to the received operation instruction, thereby operating the drive circuits A to E. Is started (step S4), and the process is terminated. If it does not match the operation combination in the operation availability determination table 131 (S3: NO), the control unit 11 returns an error signal to the microcomputer 51 (step S5) and ends the process.

  In the ASIC 1 having the above-described configuration, a combination of the drive circuits A to E that can be operated simultaneously is stored in the storage unit 13 in advance as the operation availability determination table 131 and the drive related to the operation instruction received from the microcomputer 51 is performed. Since the control unit 11 determines whether or not the combination of the circuits A to E and the driving circuits A to E in operation matches the operation combination of the operation availability determination table 131, the entire ASIC 1 is allowed. The control unit 11 can easily determine whether the drive circuits A to E can be operated according to the amount of electricity consumed, the amount of electricity consumed by each of the drive circuits A to E, and the operation status of each of the drive circuits A to E. The control unit 11 controls the operation of the drive circuits A to E based on the determination result, so that the ASIC 1 operates in parallel with the plurality of drive circuits A to E without exceeding the allowable power consumption as a whole. Can be made. Therefore, a large number of drive circuits A to E can be mounted on the ASIC 1 to form a single chip, and the system for driving the load 52 can be reduced in size and cost.

  In the present embodiment, a system for driving a load 52 such as a motor or an actuator mounted on the vehicle has been described as an example. However, the present invention is not limited to this, and other than the load 52 mounted on the vehicle. The present invention may be applied to a system that drives a load. Further, the circuits for controlling the operation of the control circuit 10 are the drive circuits A to E. However, the circuit is not limited to this, and other circuits such as the communication circuit 31, the power supply circuit 32, and the SW input processing circuit 33 shown in FIG. The operation of the circuit may be controlled, and the operation of another circuit such as a constant current circuit, a constant voltage circuit, an oscillation circuit, an amplifier circuit, or various digital circuits (not shown) may be controlled.

  Further, the operation instruction is given from the microcomputer 51 to the control circuit 10 for each of the drive circuits A to E. However, the present invention is not limited to this. For example, the operation instruction is given from the microcomputer 51 to the control circuit 10 in the form of command input or the like. For example, the operation instruction may be given by other methods. 1 includes the communication circuit 31, the power supply circuit 32, the SW input processing circuit 33, and the like. However, the ASIC 1 is not limited thereto, and may be configured not to include these circuits. A configuration in which other circuits are further mounted may be used.

(Embodiment 2)
The ASIC 1 according to the first embodiment described above is configured such that the control unit 11 determines whether the drive circuits A to E are operable based on the operation availability determination table 131 stored in the storage unit 13. When the number of circuits to be controlled is large, the operation combinations stored in the operation availability determination table 131 may increase. Therefore, in the second embodiment, a configuration for determining whether the drive circuits A to E can operate without using the operation determination table 131 will be described.

  FIG. 5 is a block diagram showing a configuration of the control circuit 210 of the ASIC 1 according to the second embodiment of the present invention. The control circuit 210 according to the second embodiment stores a current consumption table 231 in the storage unit 13 instead of the operation availability determination table 131. When the receiving unit 12 receives an operation instruction from the microcomputer 51, the control unit 211 of the control circuit 210 reads the consumption current table 231 from the storage unit 13, and based on the consumption current table 231, the driving circuits A to E Whether to operate is determined.

  FIG. 6 is a schematic diagram illustrating an example of the current consumption table 231. The current consumption table 231 is a table that stores current consumption when the drive circuits A to E mounted on the ASIC 1 are operated. The current consumption of each of the drive circuits A to E is obtained in advance by a method such as simulation or actual measurement. In the illustrated consumption current table 231, the consumption current of the drive circuit A is 50 mA, the consumption current of the drive circuit B is 150 mA, the consumption current of the drive circuit C is 100 mA, and the consumption current of the drive circuit D is 200 mA. The current consumption of the drive circuit E is 300 mA.

  The control unit 211 of the control circuit 210 reads the current consumption table 231 from the storage unit 13 when the operation instruction from the microcomputer 51 is received by the reception unit 12, and totals the current consumption by the driving circuits A to E during operation. The value (total current consumption) is calculated. Further, the control unit 211 can increase the current consumption value that can be increased by subtracting the total current consumption of the operating drive circuits A to E from the current consumption allowed for the entire ASIC 1 (the load drive unit 20 thereof). (Increasable current consumption) is calculated. Thus, the control unit 211 determines whether or not the current consumption of the drive circuits A to E related to the received operation instruction exceeds the increaseable current consumption, thereby determining the drive circuits A to E related to the received operation instruction. It is possible to determine whether the operation is possible.

  For example, when the receiving unit 12 receives an operation instruction for the driving circuit C from the microcomputer 51 when the driving circuits A and B are operating, the control unit 211 adds up the current consumption of the driving circuits A and B and sums them up. A consumption current of 200 mA (= 50 mA + 150 mA) is calculated, and an increaseable consumption current of 100 mA (= 300 mA−200 mA) is calculated by reducing the total consumption current from the allowable consumption current (300 mA) as a whole. The control unit 211 determines that the drive circuit C is operable because the current consumption 100 mA of the drive circuit C related to the operation instruction does not exceed the increaseable consumption current 100 mA, and outputs a drive signal. For example, when the receiving unit 12 receives an operation instruction from the microcomputer 51 to the driving circuit D while the driving circuits A and B are operating, the control unit 211 determines that the current consumption 200 mA of the driving circuit D related to the operation instruction is Since the increaseable consumption current exceeds 100 mA, it is determined that the drive circuit D is not operable, and an error signal is returned to the microcomputer 51.

  FIG. 7 is a flowchart showing a procedure of an operation control process performed by the control circuit 210 of the ASIC 1 according to the second embodiment of the present invention, which is a process performed by the control unit 211 of the control circuit 210. First, the control unit 211 checks whether or not the operation instruction from the microcomputer 51 is received by the reception unit 12 based on the presence or absence of the notification from the reception unit 12 (step S21). If the operation instruction is not received (S21) : NO), wait until an operation instruction is accepted. When the operation instruction from the microcomputer 51 is received (S21: YES), the control unit 211 reads the consumption current table 231 from the storage unit 13 (step S22).

  Next, the control unit 211 obtains the current consumption of the operating drive circuits A to E from the current consumption table 231 and calculates the total current consumption (step S23), and calculates the total current consumption from the allowable current consumption as a whole. Can be increased (step S24), and the current consumption of the drive circuits A to E related to the received operation instruction is acquired from the current consumption table 231 (step S25).

  Next, the control unit 211 checks whether or not the current consumption of the drive circuits A to E related to the received operation instruction exceeds the increaseable current consumption (step S26). When the increaseable consumption current is not exceeded (S26: NO), the control unit 211 starts the operation of the drive circuits A to E by outputting a drive signal to the drive circuits A to E according to the received operation instruction. (Step S27), the process ends. When exceeding the increase possible consumption current (S26: YES), the control unit 11 returns an error signal to the microcomputer 51 (step S28) and ends the process.

  In the ASIC 1 according to the second embodiment configured as described above, the current consumption of the mounted drive circuits A to E is stored in the storage unit 13 in advance as the current consumption table 231, and the power consumption read from the current consumption table 231 is stored. By adopting a configuration for determining whether or not the drive circuits A to E that have received an operation instruction by an arithmetic process such as addition, subtraction, and comparison are allowed to operate, the amount of electricity consumed by the ASIC 1 as a whole, The control unit 211 can easily determine whether or not the drive circuits A to E can operate according to the amount of electricity consumed and the operation status of each of the drive circuits A to E. Therefore, as in the first embodiment, the control unit 211 controls the operation of the drive circuits A to E based on the determination result, so that the ASIC 1 does not exceed the allowable power consumption as a whole, and a plurality of The drive circuits A to E can be operated in parallel.

  In addition, since the other structure of ASIC1 which concerns on Embodiment 2 is the same as that of ASIC1 which concerns on Embodiment 1, the same code | symbol is attached | subjected to the same location and detailed description is abbreviate | omitted.

(Embodiment 3)
The ASIC 1 according to the first embodiment and the second embodiment described above does not perform the operation of the drive circuits A to E when it is determined that the drive circuits A to E related to the operation instruction received from the microcomputer 51 cannot operate. An error signal is returned to the microcomputer 51. In contrast, when the ASIC 1 according to the third embodiment determines that the drive circuits A to E related to the operation instruction received from the microcomputer 51 cannot operate, the ASIC 1 waits for the operation of the drive circuits A to E being operated to end. In this configuration, the drive circuits A to E related to the operation instruction are operated.

  FIG. 8 is a block diagram showing a configuration of the control circuit 310 of the ASIC 1 according to the third embodiment of the present invention. The control circuit 310 according to the third embodiment includes an operation instruction storage unit 314 in addition to the control unit 311, the reception unit 12, the storage unit 13, and the like. The accepting unit 12 sequentially gives the operation instructions given from the microcomputer 51 to the operation instruction storage unit 314. The operation instruction storage unit 314 is configured by a FIFO type memory, and sequentially stores the operation instructions given from the reception unit 12 and sequentially gives the stored operation instructions to the control unit 311.

  The control unit 311 sequentially obtains the operation instructions stored in the operation instruction storage unit 314, and based on the operation availability determination table 131 stored in the storage unit 13, the operation availability of the drive circuits A to E related to the operation instruction Is determined. In addition, when it is determined that the operation is impossible, the control unit 311 performs the determination again after waiting until one of the operating drive circuits A to E is completed, and is acquired from the operation instruction storage unit 314. The standby and determination are repeated until it is determined that the drive circuits A to E related to the operation instruction are executable. Note that the operation ends of the drive circuits A to E may be configured such that, for example, an end instruction is given from the microcomputer 51, or the drive circuits A to E may end operation spontaneously.

  For example, in the operation availability determination table 131 shown in FIG. 3, when the control unit 311 obtains an operation instruction for the drive circuit D from the operation instruction storage unit 314 when the drive circuits A and B are operating, first, control is performed. The unit 311 determines that the drive circuit D is not operable. After that, the control unit 311 waits until the operation of any of the operating drive circuits A and B is completed, and performs the determination again. At this time, the control unit 311 determines that the drive circuit D is operable, for example, when the operation of the drive circuit B is completed, and the drive circuit D is not operable when the operation of the drive circuit A is completed. Therefore, the system waits until the operation of the drive circuit B is completed.

  FIG. 9 is a flowchart showing a procedure of an operation control process performed by the control circuit 310 of the ASIC 1 according to the third embodiment of the present invention, which is a process performed by the control unit 311 of the control circuit 310. First, the control unit 311 checks whether or not the operation instruction from the microcomputer 51 is stored in the operation instruction storage unit 314 (step S41). If the operation instruction is not stored (S41: NO), the microcomputer 51 The system waits until an operation instruction is given and stored in the operation instruction storage unit 314. When an operation instruction is stored in the operation instruction storage unit 314 (S41: YES), the control unit 311 acquires one operation instruction from the operation instruction storage unit 314 (step S42), and whether or not the operation instruction is available from the storage unit 13 The determination table 131 is read (step S43).

  Next, the control unit 311 determines whether or not the combination of the driving circuits A to E in operation and the driving circuits A to E that have received the operation instruction matches the operation combination stored in the operation availability determination table 131. Check (step S44). If it does not match the operation combination of the operation availability determination table 131 (S44: NO), the control unit 311 waits until the operation of any of the operating drive circuits A to E ends (step S45), and returns to step S44. The determination based on the operation availability determination table 131 is performed again.

  When the operation combination of the operation availability determination table 131 is matched (S44: YES), the control unit 311 outputs the drive signal to the drive circuits A to E according to the received operation instruction, thereby operating the drive circuits A to E. Is started (step S46), and it is checked whether another operation instruction is stored in the operation instruction storage unit 314 (step S47). When the operation instruction is stored in the operation instruction storage unit 314 (S47: YES), the control unit 311 returns to step S42, acquires the operation instruction from the operation instruction storage unit 314, and repeats the above-described processing. When the operation instruction is not stored in the operation instruction storage unit 314 (S47: NO), the control unit 311 ends the process.

  In the ASIC 1 according to the third embodiment having the above configuration, the operation unit 12 receives operation instructions from the microcomputer 51 to the drive circuits A to E, sequentially stores them in the operation instruction storage unit 314, and the control unit 311 performs operation instructions. Since the operation instruction is sequentially obtained from the storage unit 314 to determine whether or not the drive circuits A to E are operable and control the operation, the operation instruction given from the microcomputer 51 can be reliably executed. There is.

  In the third embodiment, the control unit 311 is configured to perform the determination using the operation availability determination table 131. However, the configuration is not limited to this, and the control unit 311 consumes like the control unit 211 illustrated in the second embodiment. The determination may be made using the current table 231. In this case, the control unit 311 makes a determination using the current consumption table 231 by replacing steps S43 and S44 in the flowchart shown in FIG. 9 with the same processing as steps S22 to S26 in the flowchart shown in FIG. Can be performed.

  In addition, since the other structure of ASIC1 which concerns on Embodiment 3 is the same as that of ASIC1 which concerns on Embodiment 1, the same code | symbol is attached | subjected to the same location and detailed description is abbreviate | omitted.

(Embodiment 4)
The ASIC 1 according to the fourth embodiment has a configuration in which one or more of the mounted drive circuits A to E can be operated by switching to a plurality of operation modes having different current consumption. FIG. 10 is a schematic diagram showing an example of an operation availability determination table stored in the ASIC 1 according to the fourth embodiment of the present invention. In FIG. 4, the ASIC 1 has five drive circuits A to E, and the drive circuit D has two modes of a high current consumption operation mode (current consumption 200 mA) or a low current consumption operation mode (current consumption 100 mA). It is assumed that the operation mode can be switched. The other drive circuits A, B, C, and E are the same as those shown in FIG. 3, and the current consumption allowed for the entire ASIC 1 is 300 mA.

  When the control circuit of the ASIC 1 receives an operation instruction from the microcomputer 51, it is necessary to read a pre-stored operation availability determination table and newly operate the drive circuits A to E and the operation instruction given thereto. It is determined whether or not a combination with a certain drive circuit A to E matches an operation combination stored in the operation availability determination table. When the drive circuit D is in operation, the control circuit of the ASIC 1 examines the combination of the operation availability determination table in consideration of which operation mode the drive circuit D is operating. When the operation combination in the operation availability determination table matches, the control unit of the ASIC 1 outputs a drive signal to the drive circuits A to E related to the given operation instruction to operate.

  For example, when the ASIC 1 receives an operation instruction from the microcomputer 51 to the drive circuit D while the drive circuits A and B are operating, the control circuit of the ASIC 1 first operates the drive circuit D in the high current consumption mode. Attempts are made to determine whether or not the combination of the drive circuits A and B and the drive circuit D in the high current consumption mode matches the operation combination in the operation determination table. Since this combination does not match the illustrated operation availability determination table, the control circuit of the ASIC 1 determines whether the combination of the drive circuits A and B and the drive circuit D in the low current consumption mode matches the operation combination of the operation determination table. Check further. Since this combination matches the operation combination 5 in the illustrated operation enable / disable determination table, the control circuit of the ASIC 1 determines that the drive circuit D can operate in the low current consumption mode, and drives the drive signal that operates in the low current consumption mode. Output to circuit D.

  In the ASIC 1 according to the fourth embodiment having the above-described configuration, the drive circuit can be operated in a plurality of operation modes with different current consumption, and if it is determined that the drive circuit cannot be operated in an operation mode with a large current consumption, the current consumption is further increased. By determining whether or not to operate in an operation mode with less current and operating in an operation mode with less current consumption, more drive circuits can be operated without exceeding the allowable current consumption as a whole. .

  In the fourth embodiment, the drive circuit is configured to be switchable between two operation modes of a high current consumption operation mode and a low current consumption operation mode. However, the present invention is not limited to this, and three or more operation modes are possible. It is good also as a structure which can be switched to. In this case, the control circuit of the ASIC may perform the determination using the operation availability determination table from the operation mode with the largest current consumption to the operation mode with the least current consumption.

  In addition, since the other structure of ASIC1 which concerns on Embodiment 4 is the same as that of ASIC1 which concerns on Embodiment 1, the same code | symbol is attached | subjected to the same location and detailed description is abbreviate | omitted.

(Embodiment 5)
Although the ASIC (circuit device) according to the first to fourth embodiments is configured to determine whether each drive circuit is operable according to the current consumption, the ASIC according to the fifth embodiment corresponds to the current consumption and the vehicle state. This is a configuration for determining whether or not operation is possible. Therefore, the ASIC according to the fifth embodiment is an in-vehicle ASIC for driving a load mounted on a vehicle.

  FIG. 11 is a block diagram showing a configuration of a load drive system using ASIC 501 according to Embodiment 5 of the present invention. The ASIC 501 is a circuit device that drives a load 52 such as a motor or an actuator mounted on a vehicle based on an operation instruction given from the microcomputer 51, and includes a load driving unit 20 that applies a driving voltage or a driving current to each load 52. I have. The load drive unit 20 includes a plurality of drive circuits A to G suitable for the loads 52, and the drive circuits A to G can operate independently.

  The ASIC 501 includes a control circuit 510 that controls the operation of each of the drive circuits A to G. The operation instruction given from the microcomputer 51 is received by the control circuit 510, and the control circuit 510 performs control such as operation start / stop of the drive circuits A to G in accordance with the received operation instruction.

  The ASIC 501 includes a communication circuit 531 connected to a network provided in the vehicle, and the control circuit 510 uses the communication circuit 531 to connect other devices such as a starter 555 and a vehicle speed sensor 556 connected to the network. Data can be transmitted to and received from the device. Note that the ASIC 501 according to the fifth embodiment further includes other circuits such as the power supply circuit 32 and the SW input processing circuit shown in FIG. 1, but these circuits are not shown in FIG.

  The starting device 555 is a device that includes a mounting portion (not shown) for mounting an ignition key possessed by the user, and starts the engine by rotating the mounted ignition key. In addition, the rotation operation of the ignition key by the user includes a start position for starting the engine, an engine on position for maintaining the engine operating state, and an accessory on position for supplying electric power from the battery to the in-vehicle device with the engine stopped. , And a key-off position for stopping power supply from the battery. The control circuit 510 of the ASIC 501 can acquire the rotation operation position of the ignition key by transmitting and receiving data to and from the starter 555 via the communication circuit 531.

  The vehicle speed sensor 556 is a sensor that detects the traveling speed of the vehicle. The control circuit 510 of the ASIC 501 can acquire the traveling speed of the vehicle from the vehicle speed sensor 556 by communication via the communication circuit 531, and determines whether the vehicle is traveling or stopped from the acquired traveling speed. can do.

  FIG. 12 is a block diagram showing a configuration of control circuit 510 of ASIC 501 according to the fifth embodiment of the present invention. The control circuit 510 includes a receiving unit 12 that receives an operation instruction from the microcomputer 51, and the operation instruction received by the receiving unit 12 is given to the control unit 511. Further, the control circuit 510 has a storage unit 13 that stores an operation availability determination table 513, and the control unit 511 can read the operation availability determination table 513 from the storage unit 13 and refer to it.

  Further, the control circuit 510 communicates with the starter 555 and the vehicle speed sensor 556 via the communication circuit 531, thereby acquiring the vehicle state such as the rotation operation position of the ignition key and whether or not the vehicle is running. The vehicle state acquisition unit 514 that performs the vehicle state acquisition is notified to the control unit 511.

  The control unit 511 indicates whether the drive circuits A to G according to the operation instruction from the microcomputer 51 received by the reception unit 12 are operated. The vehicle state acquired by the vehicle state acquisition unit 514 and the operation availability stored in the storage unit 13. The determination is made based on the determination table 513.

  FIG. 13 is a schematic diagram illustrating an example of the operation availability determination table 513. In this example, the drive circuit A drives an actuator for locking the vehicle door, and the drive circuit B drives an actuator for unlocking the door. And B are prohibited from operating simultaneously. The drive circuit C drives an actuator for automatically opening the trunk of the vehicle and is prohibited from driving while the vehicle is running. The drive circuit D is for lighting the front fog lamp of the vehicle and is prohibited from driving while the engine is stopped. The drive circuits E to G are for lighting the rear fog lamp, the head lamp, and the tail lamp of the vehicle, respectively, and are prohibited from driving when the ignition key is in the key-off position.

  In this example, the current consumption in each circuit when the drive circuits A to C are operated is 300 mA, and the current consumption when the drive circuit D or E is operated is 250 mA. The current consumption when the circuit F or G is operated is 200 mA. Therefore, when all of the drive circuits A to G are operated simultaneously, the current consumption is 1800 mA. However, since the allowable current consumption of the entire ASIC 501 is 1300 mA, all the drive circuits A to G are operated simultaneously. It is not possible.

  The operation enable / disable determination table 513 stores selectable operation combinations for four vehicle states of key-off, accessory-on, engine-on / stop, and engine-on / run. The key-off state is the state where the ignition key is rotated to the key-off position, the accessory-on state is the state where the ignition key is rotated to the accessory-on position, and the engine-on / stop state is the ignition key. The vehicle is turned to the engine-on position and the vehicle traveling speed is below the predetermined speed. The engine-on / running state is determined by turning the ignition key to the engine-on position and the vehicle traveling speed exceeds the predetermined speed. It is in the state.

  For example, in a key-off vehicle state, the control unit 511 can operate the drive circuits A to G with the operation combination 1 or 2. In any of the operation combinations 1 and 2, the drive circuits D to G cannot operate, and the drive circuit C can operate. In addition, the drive circuit A can operate in the case of the operation combination 1, and the drive circuit B can operate in the case of the operation combination 2. Therefore, in the key-off vehicle state, either the drive circuit A or B and the drive circuit C can be operated. In any combination, the total current consumption is 600 mA at maximum, and does not exceed the allowable current consumption of 1300 mA.

  Further, in the vehicle state where the accessory is on, the control unit 511 can operate the drive circuits A to G with the operation combination 3 or 4. In any of the operation combinations 3 and 4, the drive circuits C and EG can operate, and the drive circuit D cannot operate. The drive circuit A can operate in the case of the operation combination 3, and the drive circuit B can operate in the case of the operation combination 4. Therefore, in the vehicle state in which the accessory is on, either one of the drive circuits A or B and the drive circuits C and E to G can be operated. In any combination, the total current consumption is 1250 mA at the maximum and does not exceed the allowable current consumption of 1300 mA.

  Further, in the vehicle state where the engine is on and stopped, the control unit 511 can operate the drive circuits A to G in any one of the operation combinations 5 to 7. The drive circuits D to G can operate in any of the operation combinations 5 to 7. However, when the drive circuits D to G are operated at the same time, the total current consumption is 900 mA and the allowable current consumption is 1300 mA. Therefore, the drive circuit C and the drive circuit A or B are further operated simultaneously. I can't let you. Therefore, the drive circuit A can be operated in the case of the operation combination 5, the drive circuit B can be operated in the case of the operation combination 6, and the drive circuit C can be operated in the case of the operation combination 7. The current consumption can be 1200 mA and does not exceed the allowable current consumption of 1300 mA.

  Further, in the vehicle state where the engine is on and running, the control unit 511 can operate the drive circuits A to G with only the operation combination 8. In the operation combination 8, the drive circuits B and C cannot operate, and the other drive circuits A and D to G can operate. This is intended to enhance safety by prohibiting door unlocking and trunk opening while the vehicle is running. In the operation combination 8, the total current consumption is 1200 mA at the maximum, and the allowable current consumption 1300 mA is satisfied.

  When the operation instruction from the microcomputer 51 is received by the reception unit 12, the control unit 511 of the control circuit 510 reads the operation availability determination table 513 from the storage unit 13 and acquires the vehicle state by the vehicle state acquisition unit 514. . The control unit 511 determines whether the combination of the driving circuits A to G in operation and the driving circuits A to G that need to be newly operated in response to the operation instruction matches the combination according to the vehicle state. Check out. When the operation combination according to the vehicle state is met, the control unit 511 outputs a drive signal to the drive circuits A to G related to the given operation instruction to operate. If the operation combination according to the vehicle state is not met, the control unit 511 returns an error signal to the microcomputer 51 without operating the drive circuits A to G related to the operation instruction.

  For example, when the receiving unit 12 receives an operation instruction for the driving circuit B from the microcomputer 51 when the driving circuits A, F, and G are operating and the vehicle state is accessory on, the control unit 511 Since the combination of the circuits A, B, F and G does not match the operation combinations 3 and 4 of the operation enable / disable determination table 513, the drive circuit B is determined to be inoperable and an error signal is returned to the microcomputer 51. At this time, if an operation instruction for the drive circuit C is received from the microcomputer 51, the control unit 511 matches the operation combination 3 with the combination of the drive circuits A, C, F, and G. It is determined that operation is possible, and a drive signal is output to the drive circuit C.

  FIG. 14 is a flowchart showing a procedure of an operation control process performed by the control circuit 510 of the ASIC 501 according to the fifth embodiment of the present invention, which is a process performed by the control unit 11 of the control circuit 10. First, the control unit 511 checks whether or not the operation instruction from the microcomputer 51 is received by the reception unit 12 based on the presence / absence of a notification from the reception unit 12 (step S61). : NO), wait until an operation instruction is accepted. When the operation instruction from the microcomputer 51 is received (S61: YES), the control unit 511 reads the operation availability determination table 513 from the storage unit 13 (step S62), and the vehicle state acquisition unit 514 acquires the vehicle state. (Step S63).

  Next, the control unit 511 determines whether or not the combination of the driving circuits A to G in operation and the driving circuits A to G that have received the operation instruction matches the operation combination corresponding to the vehicle state in the operation availability determination table 513. This is checked (step S64). When it matches the operation combination corresponding to the vehicle state (S64: YES), the control unit 511 outputs the drive signal to the drive circuits A to G related to the received operation instruction, thereby operating the drive circuits A to G. Start (step S65) and end the process. When it does not match the operation combination according to the vehicle state (S64: NO), the control unit 511 returns an error signal to the microcomputer 51 (step S66), and ends the process.

  The ASIC 501 according to the fifth embodiment having the above configuration stores the operation combination according to the vehicle state in the operation availability determination table 513, and stores the vehicle state acquired by the vehicle state acquisition unit 514 and the operation availability determination table 513. By adopting a configuration for determining whether or not the drive circuits A to G are operable based on the ASIC 501, the ASIC 501 can perform not only consumption current but also appropriate operation control according to the vehicle state.

  In the present embodiment, four vehicle states are set to key-off, accessory-on, engine-on / stop, and engine-on / running, but this is an example and the present invention is not limited to this. In addition, although the vehicle state acquisition unit 514 acquires the vehicle state based on the rotation operation position of the ignition key and the traveling speed of the vehicle, the present invention is not limited to this. For example, when a switch for switching lighting control such as a head lamp and a tail lamp is mounted on the vehicle, and the manual lighting or automatic lighting of the lamp can be switched by the switch, the vehicle state based on the switching position of the switch is changed to the vehicle. The state acquisition unit 514 may acquire it. When the lamp is automatically turned on, a sensor that detects ambient brightness and the like is mounted on the vehicle. The vehicle state acquisition unit 514 may further acquire the vehicle state based on the detection result of the sensor. Further, for example, the vehicle state acquisition unit 514 may acquire a vehicle state based on an operation state of a switch that turns on an interior lamp such as a room lamp and a curtain lamp. By combining the operation states of these switches and the detection results of the sensors, various vehicle states can be acquired and circuit control can be performed.

  Further, the drive target of the drive circuits A to G shown in FIG. 13 is an example, and the present invention is not limited to this. Moreover, the operation availability determination table 513 illustrated in FIG. 13 is an example and is not limited thereto. FIG. 15 is a schematic diagram illustrating another example of the operation availability determination table 513. As described above, in the operation availability determination table 513 illustrated in FIG. 13, the allowable current consumption is 1300 mA. On the other hand, in the operation determination table 513 shown in FIG. 15, the allowable current consumption is 1500 mA. Therefore, in the vehicle state where the engine is on and stopped, either one of the drive circuits A or B and the drive circuits C to G can be operated simultaneously. As described above, the operation combination of the operation availability determination table 513 may be set as appropriate according to the current consumption allowed by the ASIC 501 and the function of the vehicle.

It is a block diagram which shows the structure of the load drive system using the circuit apparatus which concerns on this invention. It is a block diagram which shows the structure of the control circuit of ASIC which concerns on Embodiment 1 of this invention. It is a schematic diagram which shows an example of an operation availability determination table. It is a flowchart which shows the procedure of the operation control process which the control circuit of ASIC which concerns on Embodiment 1 of this invention performs. It is a block diagram which shows the structure of the control circuit of ASIC which concerns on Embodiment 2 of this invention. It is a schematic diagram which shows an example of a consumption current table. It is a flowchart which shows the procedure of the operation control process which the control circuit of ASIC which concerns on Embodiment 2 of this invention performs. It is a block diagram which shows the structure of the control circuit of ASIC which concerns on Embodiment 3 of this invention. It is a flowchart which shows the procedure of the operation control process which the control circuit of ASIC which concerns on Embodiment 3 of this invention performs. It is a schematic diagram which shows an example of the operation availability determination table which ASIC which concerns on Embodiment 4 of this invention memorize | stores. It is a block diagram which shows the structure of the load drive system using ASIC which concerns on Embodiment 5 of this invention. It is a block diagram which shows the structure of the control circuit of ASIC which concerns on Embodiment 5 of this invention. It is a schematic diagram which shows an example of an operation availability determination table. It is a flowchart which shows the procedure of the operation control process which the control circuit of ASIC which concerns on Embodiment 5 of this invention performs. It is a schematic diagram which shows the other example of an operation availability determination table.

Explanation of symbols

1 ASIC (circuit equipment)
10 control circuit 11 control unit (determination means, circuit operation control means, calculation means)
12 Reception part (reception means)
13 Storage unit (storage means)
DESCRIPTION OF SYMBOLS 20 Load drive part 51 Microcomputer 52 Load 131 Operation | movement availability determination table 210 Control circuit 211 Control part 231 Current consumption table 310 Control circuit 311 Control part 314 Operation instruction | indication memory | storage part (operation instruction memory | storage means)
501 ASIC (circuit equipment)
510 control circuit (determination means, circuit operation control means)
511 Control unit 514 Vehicle state acquisition unit (vehicle state acquisition means)
513 Operation availability determination table 555 Starter 556 Vehicle speed sensor AG Driving circuit (circuit)

Claims (4)

In a circuit device equipped with a plurality of circuits that can be selectively operated,
Storage means for storing a combination of circuits that can be operated in parallel based on the allowable total consumed electric energy and the consumed electric energy of each circuit;
Determination means for determining whether each circuit can be operated based on the combination stored in the storage means and the operation status of each circuit;
Circuit operation control means for operating the circuit in accordance with a determination result of the determination means. In a circuit device equipped with a plurality of circuits that are mounted on a vehicle and can be selectively operated,
Vehicle state acquisition means for acquiring a state relating to the traveling of the vehicle;
A storage unit that stores a combination of circuits that can be operated in parallel on the basis of an allowable amount of electricity consumed and an amount of electricity consumed by each circuit in association with the vehicle state acquired by the vehicle state acquisition unit. When,
Determining means for determining whether each circuit can be operated based on the combination stored in the storage means, the operation status of each circuit, and the vehicle state acquired by the vehicle state acquiring means;
Circuit operation control means for operating the circuit in accordance with a determination result of the determination means. Accepting means for accepting external operation instructions for each circuit;
An operation instruction storage means for storing the operation instruction received by the reception means;
Said circuit operation control means, said operation instruction in the order in which the storage means stores the operation instruction, the circuit device according to claim 1 or claim 2, characterized in that you have to operate the circuit in accordance with said operating instructions . The plurality of circuits include circuits that can be operated in a plurality of operating states with different amounts of electricity consumed,
When the determination unit determines that the circuit cannot be operated in an operation state with a large amount of electricity consumed, the determination unit determines whether or not the circuit can be operated in an operation state with a small amount of electricity consumption. And
The circuit operation control unit is configured to operate the circuit in an operation state with a small amount of electricity consumption when the determination unit determines that the circuit can be operated in an operation state with a small amount of electricity consumption. The circuit device according to any one of claims 1 to 3 , wherein:

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