Z86C04 Datasheet, PDF (19/34 Pages) Zilog, Inc. – CMOS 8-BIT LOW-COST 1K/2K-ROM MICROCONTROLLERS

Z86C04/C08
CMOS 8-Bit Low-Cost 1K/2K-ROM Microcontrollers
Port 2 (P27-P20). Port 2 is an 8-bit I/O, bit programmable,
bi-directional, Schmitt-triggered CMOS compatible I/O
port. These eight I/O lines can be configured under soft-
Zilog
ware control to be an input or output, independently. Bits
programmed as outputs may be globally programmed as
either push-pull or open-drain (Figure 8).
MCU
Port 2 (I/O)
Open Drain
Open
PAD
Out
1.5
2.3 Hysteresis Vcc @ 5.0V
In
R 500 kΩ
Figure 7. Port 2 Configuration
Auto Latch
19
PRELIMINARY
DS97DZ80502