ZiLOG Z8 Series

Z8
®
CPU
User Manual
UM001604-0108 Input/Output Ports
53
Figure 39. Port 2 Configuration with Open-Drain Capability, Autolatch, and
Schmitt-Trigger
Figure 40. Port 2 Configuration with TTL Level Shifter
P21–P26 OE
PIN
P21–P26 OUT
P21–P26 IN
2.3 V Hysteresis @ V
CC
= 5.0 V
OPEN-DRAIN
1.5
R ≈ 500 K Ω
Autolatch
P21–P26
OEN
PIN
OUT
IN
TTL Level Shifter
Open-Drain