摘要 |
PROBLEM TO BE SOLVED: To reduce the number of I/O terminals and chip size, in an integrated circuit device for vehicle devices. SOLUTION: The integrated circuit device for vehicle devices 10 comprises an ignition control circuit 11, a power source voltage control circuit 12, diagnosis control circuit 13 and a testing circuit 14. These control circuits 11 to 14 are operated, according to control commands supplied from the microcomputer 40 for air bag control or a microcomputer 50 for testing. These control commands, added with channel data and as serial data SD, are supplied from each of computers 40 and 50 to a serial interface circuit 15, in synchronization with timing signals CK. The serial interface circuit 15 and a decoder circuit 16a outputs a control signal, according to each control command to each control circuit 11 to 14. COPYRIGHT: (C)2005,JPO&NCIPI
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