Lucent Technologies MN10285K - Manual (Page 269)

I/O Ports
I/O Port Circuit Diagrams
Panasonic Semiconductor Development Company MN102H75K/F75K/85K/F85K LSI User Manual
268
Panasonic
Figure 11-17 P34/VREF (Port 3)
P3PUP4
0: Pullup off
1: Pullup on
P3MD4
0: P34
1: VREF
VREF
P3DIR4
0: Port input
1: Port output
P3OUT4
Pin
P3IN4
0: Port low output
1: Port high output
P34/VREF