Datasheet

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10.5.2 Wait State Control
Setting the WCR controls waits during address/data multiplex I/O space accesses. Software wait
and external wait insertion timing is the same as during ordinary space accesses. The timing for
one software wait + one external wait inserted is shown in figure 10.18.
CK
CS3
AH
RD
Data
WRx
Data
WAIT
Address
T
a1
T
a2
T
a3
T
a4
T
1
T
W
T
Wo
T
2
Read
Write
Address output
Address output
Data output
Data
input
Figure 10.18 Address/Data Multiplex I/O Space Access Wait State Timing (One Software
Wait + One External Wait)