135
By program wait
T
1
Address bus
ø
AS
RD
Data bus
Read data
Read
HWR
,
LWR
Write data
Write
WAIT
Data bus
T
2
T
w
T
w
T
w
T
3
By
WAIT
pin
Notes: 1. Downward arrows indicate the timing of
WAIT
pin sampling.
2. When RDNn = 0
Figure 4.17 Example of Wait State Insertion Timing
The settings after a reset are: 3-state access, insertion of 7 program wait states, and
WAIT
input
disabled.
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