z86c96 ZiLOG Semiconductor, z86c96 Datasheet - Page 22

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

PIN FUNCTIONS (Continued)
Z86C61/62/96
CMOS Z8 Microcontroller
Port 2 (P27-P20). Port 2 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 2 is always
available for I/O operation. When used as an I/O port, Port
22
Open-Drain
OEN
Out
In
TTL Level Shifter
MCU
Figure 15. Port 2 Configuration
PS003501-0301
P R E L I M I N A R Y
R
500 K
2 may be placed under handshake control. In this configu-
ration, Port 3 lines P31 and P36 are used as the hand-
shake control lines /DAV2 and RDY2. The handshake sig-
nal assignment for Port 3 lines P31 and P36 is dictated by
the direction (input or output) assigned to P27 (Figure 15).
Port 2 (I/O)
Handshake Controls
/DAV2 and RDY2
(P31 and P36)
Auto Latch
PAD
DS97Z8X1600
Zilog