MSM80C154S/83C154S/85C154HVS

 

 

 

 

 

INTERNAL

 

 

 

 

 

 

BUS

 

 

VCC

 

 

CONTROL

 

 

 

 

 

 

 

 

 

 

 

 

 

D

C

P1

P2

P3

 

 

Q

MODIFY

 

 

 

 

 

 

 

 

 

 

 

 

PORT 1

READ

 

 

 

 

 

 

 

D

 

 

 

 

 

WP1

Q

 

 

 

 

N

 

Figure 5-4

Port 1 internal equivalent circuit

 

196

Page 203
Image 203
Sonic Alert msm85c154hvs, msm83c154s, msm80154s 196, Control Modify Port Read WP1, Port 1 internal equivalent circuit