z86e63 ZiLOG Semiconductor, z86e63 Datasheet - Page 18

• Manufacturer Part Number: z86e63
• Description: Cmos Z8 16k/32k Eprom Microcontroller
• Manufacturer: ZiLOG Semiconductor

PS014401-1001
Figure 7. Port 1 Configuration
Port 2 (P27-P20). Port 2 is an 8-bit, bit programmable, bi-directional, CM0S com-
patible port. Each of these eight I/0 lines can be independently programmed as an
input or output, or globally as an open-drain output. Port 2 is always available for I/
0 operation. When used as an I/0 port, Port 2 can be placed under handshake
control. In this configuration, Port 3 lines P31 and P36 are used as the handshake
control lines DAV2 and RDY2. The handshake signal assignment for Port 3 lines,
P31 and P36, is dictated by the direction (input or output) assigned to P27 (Figure
8 and Table 21 on page 16).
OEN
Out
In
TTL Level Shifter
Z86E61
MCU
/E63
8
R = 500 k Ω
CMOS Z8 16K/32K EPROM Microcontroller
Handshake controls
(AD7-AD0)
DAV1 and RDY1
(P33 and P34)
Port 1
Auto Latch
PAD
Z86E61/E63
14