Page 15 - 8237A (1)

8237A

WAVEFORMS

SLAVE MODE WRITE TIMING

231466–13
NOTE:
1. Successive read and/or write operations by the external processor to program or examine the controller must be
timed to allow at least 400 ns for the 8237A-5 as recovery time between active read or write pulses. The same recovery
time is needed between an active read or write pulse followed by a DMA transfer.
Figure 9. Slave Mode Write

SLAVE MODE READ TIMING

231466–14
NOTE:
1. Successive read and/or write operations by the external processor to program or examine the controller must be
timed to allow at least 400 ns for the 8237A-5 as recovery time between active read or write pulses. The same recovery
time is needed between an active read or write pulse followed by a DMA transfer.
Figure 10. Slave Mode Read

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