| 摘要 |
PURPOSE:to establish the syncrhonism between a transmission and a receiving side at the GII machine, etc. by perfroming the message processing at each scanning period at the transmission or receiving with time management in the software with a microcomputer. CONSTITUTION:In transmitting a synchronizing signal to a receiving side at the transmission, a black level data is preset to an address 10-byte and white level data is preset to the remaining address of an RAM 5. When the transmission of the syncrhonizing signal is started, an MODEM 7 fetches a data from a P/S-S/P converting circuit 6 one by one bit with a clock from a clock generating circuit 12, and when the data for 8-bit's share is outputted to the MODEM 7, an interruption signal INT is outputted to a CPU 3. When the CPU 3 receives this interruption signal, a transmission data 1-byte is transmitted from the RAM 5 with the highest priority of other processing to the circuit 6. The CPU outputs 1-byte to the circuit 6 in this processing. |
