
Programmable Wait Mode: The number of wait states (T
W
) selected by bits WC1 and WC0 are
inserted in all accesses to external three-state-access areas. Figure 6-15 shows the timing when the
wait count is 1 (WC1 = 0, WC0 = 1).
Figure 6-15 Programmable Wait Mode
T
1
T
2
T
W
T
3
ø
Address bus
AS
RD
HWR
,
Data bus
Data bus
External address
Read data
Write data
Read
access
Write
access
LWR
137
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