| 摘要 |
PROBLEM TO BE SOLVED: To provide a serial communication system, capable of attaining easy and sure serial communication. SOLUTION: An CS signal for requesting serial communication is outputted from a master processor 12, and an OK_INV signal responding to the CS signal is outputted from a slave processor 14. The master processor 12 executes, when the CS signal in an active state, serial communication of a determined bit number every time when the level of the OK_INV signal is reversed. The slave processor 14 reverses the level of the OK_INV signal in response to transfer of the CS signal to the active state. The slave processor 14 further changes the level of the OK_INV signal every time when the serial communication of the determined bit number is completed. COPYRIGHT: (C)2008,JPO&INPIT
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