Oki ML521, ML520 manual Principles of Operation Parallel Interface Control

Models: ML521 ML520

1 269
Download 269 pages 15.77 Kb
Page 43
Image 43

Page: 27

Service Guide ML520/521

Chapter 2 Principles of Operation

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.

Copyright 1997, Okidata, Division of OKI America, Inc. All rights reserved. See the OKIDATA Business Partner Exchange (BPX) for any updates to this material. (http://bpx.okidata.com)

Page 43
Image 43
Oki ML521, ML520 manual Principles of Operation Parallel Interface Control