z86c96 ZiLOG Semiconductor, z86c96 Datasheet - Page 26

• Manufacturer Part Number: z86c96
• Description: Cmos Z8 Microcontroller
• Manufacturer: ZiLOG Semiconductor

PIN FUNCTIONS (Continued)
Z86C61/62/96
CMOS Z8 Microcontroller
Port 4 (P47-P40). Port 4 is an 8-bit, bit programmable, bi-
directional, CMOS-compatible port. Each of these eight
I/O lines can be independently programmed as an input or
output or globally as an open-drain output. Port 4 is always
available for I/O operation (Figure 18). Port address (F)02.
Port 5 (P57-P50). Same as Port 4. Port address (F)04.
26
Open-Drain
OEN
Out
In
TTL Level Shifter
MCU
Figure 18. Port 4 Configuration
PS003501-0301
P R E L I M I N A R Y
R
500 K
Port 6 (P63-P60). Same as Port 4. (Note: this is a 4-bit
port, bits D3-D0.) Port address (F)07.
Auto Latch. The Auto Latch puts valid CMOS levels on all
CMOS inputs that are not externally driven. This reduces
excessive supply current flow in the input buffer when it is
not being driven by any source.
Port 4 (I/O)
Auto Latch
PAD
DS97Z8X1600
Zilog