2.1.03 Parallel Interface Control
The parallel data input from the host to the interface LSI is latched to the internal register at the
falling edge of the STROBE-N signal.
The LSI sets the BUSY-N signal to inform the host that the data is being processed. The LSI
also outputs the RXD-N signal to inform the MPU of data reception. The data is read upon
receiving the RD-N signal from the MPU.
When the data processing is complete, the BUSY-N signal is disabled and the ACK-N signal is
sent to request the next data. When the buffer is full and reception is not desired, the BUSY
signal is sent to request data transmission be stopped.
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Microline 520/521 Service Handbook 2 - 7 Principles of Operation
P/N 59257803
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