| 摘要 |
Through the output terminal of the bus transceiver(Q4), an interrupt signal is generated. The interrupt signal is inputted to the programmable peripheral interface circuit and at the same time inputted to the inverter(N1) and is inverse. When an inversion signal is fed to the interrupt terminal of the microprocessor, the microprocessor performs the interrupt routine. the programmable peripheral interface circuit which receives an output interrupt signal of the bus transceiver, generates a data transmission control signal. Consequently the command data outputted from the programmable peripheral interface circuit is inputted to the microprocessor.
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