7
Z08617 NMOS Z8
®
8-B
IT
MCU
K
EYBOARD
C
ONTROLLER
PIN FUNCTIONS
(Continued)
Port 1
(P17-P10). Port 1 is an 8-bit, byte programmable,
bidirectional, NMOS compatible I/O port. These eight I/O
lines are configured under software control program as a
byte input port or as an open-drain output port. When used
as an I/O port, inputs are standard NMOS (Figure 6).
Port 1
I/O
(Open-Drain Output)
Z8615
8
Input
Output
Pad
OEN
Figure 6. Port 1 Configuration
