Z86E6116PSC Datasheet, PDF (19/69 Pages) Zilog, Inc. – Z86E61/Z86E63 CMOS Z8 16K/32K EPROM Microcontroller

Z86E61/E63
CMOS Z8 16K/32K EPROM Microcontroller
15
Z86E61
/E63
MCU
Open-Drain
OEN
Port 2 (I/O)
Handshake controls
DAV2 and RDY2
(P31 and P36)
PAD
Out
TTL Level Shifter
In
R = 500 kΩ
Figure 8. Port 2 Configuration
Auto Latch
Port 3 (P37-P30). Port 3 is an 8-bit, CMOS compatible four-fixed input and four-
fixed output port. These eight I/O lines have four-fixed (P33-P30) input and four-
fixed (P37-P34) output ports. Port 3, when used as serial I/O, is programmed as
serial in and serial out, respectively (Figure 9).
PS014401-1001