Z86E6116PSC Datasheet, PDF (18/69 Pages) Zilog, Inc. – Z86E61/Z86E63 CMOS Z8 16K/32K EPROM Microcontroller

Z86E61/E63
CMOS Z8 16K/32K EPROM Microcontroller
14
Z86E61
/E63
MCU
8
Port 1
(AD7-AD0)
Handshake controls
DAV1 and RDY1
(P33 and P34)
OEN
Out
TTL Level Shifter
In
R = 500 kΩ
PAD
Auto Latch
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).
PS014401-1001