| 摘要 |
PURPOSE:To perform transfer by using serial ports between microprocessors which differ in serial communication system by generating a clock signal with a serial transfer speed through the mutual synchronization of a counter between clock signals. CONSTITUTION:When data is set in the serial buffer 5 of the 1st microprocessor 1, a status signal (b) becomes busy and when the transmission of the data from the serial buffer 5 is completed and a stop bit SP is sent out, the status signal becomes ready. The sent data is applied to the serial input port SI and interruption port IRQ of the 2nd microprocessor 2, and when a start bit is detected, the counter is started and a clock signal CK 2 is applied to a serial clock port SC, so that received data is written in a serial buffer 6. The status signal (c) of the serial buffer 6 becomes full and the data is transferred to a logical processing part, etc. |
