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Sonic Alert msm80c154s
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MSM80C154S/83C154S/85C154HVS
196
Q
D
READ
INTERNAL
BUS
WP1
MODIFY
Q
D
C
CONTROL
P1
V
CC
P2
P3
PORT 1
N
Figure 5-4 Port 1 internal equivalent circuit
1
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201
202
203
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205
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