Zilog Z16C35 User Manual

Page 157

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Application Note

Interfacing Z80

®

CPUs to the Z8500 Peripheral Family

6-3

6

Write Cycle Timing

Figure 2 illustrates the Z8500 Write cycle timing. All
register addresses and /INTACK must remain stable
throughout the cycle. If /CE goes active after /WR goes

active, or if /CE goes inactive before /WR goes inactive,
then the effective Write cycle is shortened. Data must be
available to the peripheral prior to the falling edge of /WR.

Figure 1. Z8500 Peripheral I/O Read Cycle Timing

Figure 2. Z8500 Peripheral I/O Write Cycle Timing

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