Abstract: An information processing apparatus includes the following elements. A first reception unit receives information concerning power consumption of a target device and time information. A second reception unit receives information concerning an operation state of the target device and time information. A calculator calculates a value of power consumption of the target device in the operation state, on the basis of the time information received by the first reception unit and the time information received by the second reception unit. An output unit outputs the value of power consumption of the target device calculated by the calculator.

Abstract: A vehicle-mounted electronic control apparatus can perform a variety of abnormality detections while reducing the control load of a microprocessor in the abnormality detection of a volatile backup memory that is backed up by an on-board battery. The apparatus includes a control CPU which is fed with power from a main power supply circuit upon closure of a power switch, a nonvolatile control memory and a backup memory. Even if the power switch is opened, the backup memory, being a partial area of a RAM memory, is fed with power through an auxiliary power supply circuit connected directly to the battery. When the battery is replaced with a new one and connected again, a power supply interruption monitoring memory is reset. At the start of operation of the control CPU, the backup memory is initialized based on reset information, and the power supply interruption monitoring memory is rewritten into a set state.

Abstract: A vehicle-mounted electronic control apparatus can perform a variety of abnormality detections while reducing the control load of a microprocessor in the abnormality detection of a volatile backup memory that is backed up by an on-board battery. The apparatus includes a control CPU which is fed with power from a main power supply circuit upon closure of a power switch, a nonvolatile control memory and a backup memory. Even if the power switch is opened, the backup memory, being a partial area of a RAM memory, is fed with power through an auxiliary power supply circuit connected directly to the battery. When the battery is replaced with a new one and connected again, a power supply interruption monitoring memory is reset. At the start of operation of the control CPU, the backup memory is initialized based on reset information, and the power supply interruption monitoring memory is rewritten into a set state.

Abstract: A vehicle-mounted electronic control apparatus can perform a variety of abnormality detections while reducing the control load of a microprocessor in the abnormality detection of a volatile backup memory that is backed up by an on-board battery. The apparatus includes a control CPU which is fed with power from a main power supply circuit upon closure of a power switch, a nonvolatile control memory and a backup memory. Even if the power switch is opened, the backup memory, being a partial area of a RAM memory, is fed with power through an auxiliary power supply circuit connected directly to the battery. When the battery is replaced with a new one and connected again, a power supply interruption monitoring memory is reset. At the start of operation of the control CPU, the backup memory is initialized based on reset information, and the power supply interruption monitoring memory is rewritten into a set state.

Abstract: The constant voltage power source circuit which generates a predetermined constant voltage output Vcc by the use of power supplied from an in-vehicle battery via a power switch has a power transistor and an output voltage adjustment circuit. The output voltage adjustment circuit has a reference voltage generation circuit, a comparison amplification circuit, a resistance circuit network, and a nonvolatile second data memory selecting any of a plurality of on/off elements provided in the resistance circuit network and producing electric continuity of the selected on/off element. The constant voltage output Vcc is measured by an externally connected high accuracy voltmeter in the dispatch adjustment stage to be read out and stored via a serially connected external tool. Output voltage correction data are stored in the second data memory in such a manner as to set the external measurement voltage as a target voltage.

Abstract: A constant-voltage power supply circuit unit that is fed from a vehicle-borne battery via a power switch and generates a predetermined constant-voltage output Vcc includes a power transistor and an output voltage regulating circuit unit. The output voltage regulating circuit unit includes a reference voltage generating circuit, a comparison amplifying circuit, a resistance circuit network, a non-volatile second data memory that selectively continues plural open/close elements provided in the resistance circuit network, and a temperature detector. The quantity of variation of output voltage with respect to ambient temperature detected by the temperature detector is estimated, and a setting voltage is corrected to be approximate to a predetermined output voltage, or conversion correction of AD conversion data is performed on the basis of voltage variation characteristics of an analog sensor.

Abstract: A first control circuit portion carries out input/output control in cooperation with a microprocessor, a program memory, and a RAM memory. A second control circuit portion is in cooperation with the communication control circuit portion and the data memory to carry out serial communication with the first control circuit portion. A switch signal input to the second control circuit portion is stored in a first report packet, a digital conversion value for an analog signal input is stored in a second report packet, and the first and second packets are alternately periodically transmitted to the first control circuit portion. A multi-channel AD converter included in an analog signal input circuit starts to carry out AD conversion a prescribed time period after a first report packet is transmitted and finishes conversion before a second report packet is transmitted, so that up-to-date AD conversion data is transmitted.

Abstract: A microprocessor of an on-vehicle electronic control unit controls an on-vehicle current consumer group responsive to input signals of on-vehicle sensor groups based on control program, fixed control constant and semi-fixed control constant respectively stored in first block of a no-volatile memory, and variable control constant having been transferred from second block of the no-volatile memory to RAM memory; and content of RAM memory is learned and compensated during operation. When power supply switch is OFF, contents of the RAM memory are sequentially added to and written in the second block. When the second block is filled up to capacity, batch clear is executed and, thereafter, the latest data is written. Thus, a flash memory divided into the first and second blocks capable of executing batch clear separately is employed as a non-volatile memory, enabling to perform save processing many times with small number of times of batch clear.

Abstract: A first control circuit section (master station) and a second control circuit section (substation) communicate with each other via series-parallel converters. The master station includes regular transmission device and transmission-permitting signal generation device; and the sub station includes regular report device, confirmation reply device relative to a transmission data from the master station, and an unprocessed data table. The unprocessed data table prevents jam-up in upstream communication from the sub station to the master station, enabling to carry out timely regular transmission and regular reporting. Transmission from the sub station to the master station is performed based on a transmission-permitting control signal that the master station generates. Consequently, it is possible to execute communication error processing and diminish communication control burden on the master station while properly performing the regular transmission and regular report between the master station and sub station.

Abstract: In an electronic control unit, a control constant stored in a program memory is transmitted to a data memory via a serial communication circuit. First control circuit section (master station) and second control circuit section (substation) mutually communicate through series-parallel converters. The master station includes regular transmission device and storage constant confirmation processing device. The substation includes regular report device and confirmation reply device to a data transmitted from the master station. A constant set data transmitted from the master station by regular transmission device is stored in the data memory at the time of normal receiving. Confirmation information such as sum value of the entire data in the data memory is reported by regular report device. At the master station, if there is any error in the confirmation information, a constant set data is retransmitted with regular transmission device. Reliability of data in the data memory is improved.

Abstract: First and second control circuit sections that mutually communicate via a series-parallel converter comprise first and second adder-subtracter respectively. When any receiving error occurs in each control circuit section, a variation value 3 is added to the adder-subtracter on the receiving side. When data is normally received, a variation value 1 is subtracted from the adder-subtracter. Initial value of the adder-subtracter is set to 9. When a current value exceeds 11, first and second error detection signal is generated to carry out alarm display or initialization, and initialization and restart of the other-side control circuit section.

Abstract: An on-vehicle electronic control device includes an auxiliary microprocessor and subjects a microprocessor allocated to a main part of control to an external diagnosis, thereby improving reliability of performance. A microprocessor including a nonvolatile program memory into which a control program is written is serially connected to an auxiliary microprocessor including an auxiliary nonvolatile program memory. The microprocessor and the auxiliary microprocessor function in cooperation to control on-vehicle electric load groups in response to input signals from on-vehicle sensor groups and on-vehicle analog sensor group. The nonvolatile program memory and the microprocessor are subjected to runaway monitoring performed by a watchdog timer and to an external checksum diagnosis performed periodically by the auxiliary microprocessor. If an anomaly occurs in the runaway monitoring, the external checksum diagnosis, and a checksum interval, parts of electric loads are cut off of power supply by load power relay.

Abstract: A system and method are disclosed to efficiently arbitrate access contention on a XML data between a plurality of users. A system for controlling access to XML data, includes a management section for managing holders of exclusive access rights of corresponding partial data for each of at least one partial data included in the XML data. A delegation section changes the holder of a second exclusive access right on second partial data, which is a part of first partial data, from a first holder to a second holder in order to delegate a part of a first exclusive access right held by the first holder on the first partial data. An access control section inhibits access to the second partial data from the first holder and permits access to the second partial data from the second holder on condition that the first exclusive access right is delegated.

Abstract: An electronic control unit includes a serial communication circuit capable of easily confirming presence or absence of communication error while regular transmission/regular report between master station and sub station are performed timely. First and second control circuit sections 200a (master station) and 200b (substation) communicate mutually via series-parallel converters 117, 127. The master station includes regular transmission device 201 and irregular transmission device 211. The substation includes regular report device 221, confirmation reply device 205 and report reply device 215 relative to transmission data from the master station, and unprocessed data table 204. The confirmation reply device 205 and report reply device 215 confirm whether or not downstream communication from the master station to sub station is normal.

Abstract: The constant voltage power source circuit which generates a predetermined constant voltage output Vcc by the use of power supplied from an in-vehicle battery via a power switch has a power transistor and an output voltage adjustment circuit. The output voltage adjustment circuit has a reference voltage generation circuit, a comparison amplification circuit, a resistance circuit network, and a nonvolatile second data memory selecting any of a plurality of on/off elements provided in the resistance circuit network and producing electric continuity of the selected on/off element. The constant voltage output Vcc is measured by an externally connected high accuracy voltmeter in the dispatch adjustment stage to be read out and stored via a serially connected external tool. Output voltage correction data are stored in the second data memory in such a manner as to set the external measurement voltage as a target voltage.

Abstract: A constant-voltage power supply circuit unit that is fed from a vehicle-borne battery via a power switch and generates a predetermined constant-voltage output Vcc includes a power transistor and an output voltage regulating circuit unit. The output voltage regulating circuit unit includes a reference voltage generating circuit, a comparison amplifying circuit, a resistance circuit network, a non-volatile second data memory that selectively continues plural open/close elements provided in the resistance circuit network, and a temperature detector. The quantity of variation of output voltage with respect to ambient temperature detected by the temperature detector is estimated, and a setting voltage is corrected to be approximate to a predetermined output voltage, or conversion correction of AD conversion data is performed on the basis of voltage variation characteristics of an analog sensor.

Abstract: A voltage generated by a variable analog signal source is input to first and second input terminals of a multi-channel A/D converter via an analog signal input circuit including an analog switch and first and second amplifiers, and a resulting digital conversion value is written to a data memory via a microprocessor. Digital conversion values corresponding to voltages at the first and second input terminals that are obtained when the analog switch is opened are stored as first and second error voltages and used for producing first and second correction voltages, respectively. When the input voltage is low, a value obtained by dividing, by a compensation gain, a second correction voltage corresponding to a second input voltage that is produced by the second amplifier and input to the second input terminal as an enlarged range input terminal is selected.

Abstract: To ensure the polling of a server 11 will reach clients 12 from which an ACK/NACK has not been received despite the change of IP addresses of clients 12 in a network system where an ACK/NACK is to be sent back from each client 12 to the server 11 after file data is transmitted from the server 11 to multiple clients 12 by means of broadcast. Clients 12 in a group are granted identification IDs that are mutually identifiable and permanent. Server 11 send the polling by means of multicast that contains information about permanent IDs of the clients 12 from which it has not received an ACK/NACK. Each of the clients 12 replies with an ACK/NACK if its own permanent ID is contained in the polling, otherwise makes no reply.

Abstract: Intake throttle valves 21a to 21d disposed on the intake pipes 15a to 15d for each cylinder of a multi-cylinder engine 10 are provided with motors 20a to 20d for controlling valve opening of the intake throttle valves. The microprocessor 31 controls throttle valve opening in response to a degree of stepping on an accelerator pedal 42 in cooperation with a program memory 32A. The control of valve opening by each motor is sequentially subject to time division processing in the exhaust stroke of each cylinder, and a current valve opening is stored and held by a feedback control circuit section 39, 69B, 69C in the other strokes, thereby the control burden on the microprocessor being reduced.

Abstract: A microprocessor 20a controls an electrical load group 12 responsive to content of a non-volatile program memory 25a and operation state of an input sensor group 11. A monitoring control circuit section 30a sequentially transmits a large number of question items with an inquiry packet, and compares response content from the microprocessor 20a with correct answer information to carry out an error determination. The microprocessor 20a diagnoses an interval of receiving an inquiry packet to monitor in reverse the monitoring operation of the monitoring control circuit section 30a. Thus, in an electronic control unit having a microprocessor built-in, a monitoring control circuit is obtained that alternatively executes at regular intervals a part of control programs to carry out operation inspection during operation.