| 摘要 |
PURPOSE:To relieve the load of an external host processor by providing a reception FIFO circuit and a comparator comparing data representing the end of sent data. CONSTITUTION:In a binary synchronous protocol BISYNC as a communication protocol, a code representing the end of a transmission block is an end of transmission block ETB and a block check character BCC follows thereafter. A value 17H (hexadecimal expression) of the ETB is stored in advance to a comparator 105 and when the ETB is detected in the received data, the output of the comparator 105 is active, a reception FlFO status circuit 103 and a control circuit 104 are initialized and the BCC is eliminated from the reception FIFO circuit 101. Thus, the load of an external host processor is relieved.
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