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W78C801
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W78C801
- 16 -
Timing Waveforms, continued
Data Write Cycle
S2
S3
S5
S6
S1
S2
S3
S4
S1
S5
S6
S4
XTAL1
ALE
PSEN
A8-A15
DATA OUT
PORT 2
PORT 0
A0-A7
WR
T
T
DAW
DAD
T
DWR
T
DWD
Port Access Cycle
XTAL1
ALE
S5
S6
S1
DATA OUT
T
T
PORT
INPUT
T
SAMPLE
PDA
PDH
PDS
1
...
...
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