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User’s Manual
159
I/O bus cycles have an automatic wait state and thus require 3 clocks plus any extra wait
states specified.
Figure 15-4. I/O Read and Write Cycles No Extra Wait States
Tadr
Tadr
External I/O Read (no extra wait states)
Thold
valid
CLK
A[15:0]
D[7:0]
valid
Tsetup
Thold
External I/O Write (no extra wait states)
CLK
A[15:0]
D[7:0]
/CSx
/OEx
/CSx
/WEx
valid
T1
Tw
T1
Tw
T2
valid
T2
valid
/IOCSx
/IORD
/BUFEN
valid
/IOCSx
/IOWR
/BUFEN
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