Z86D86 Datasheet, PDF (22/80 Pages) Zilog, Inc. – 28-Pin Low-Voltage OTP Microcontroller

Z86D86
28-Pin Low-Voltage OTP Microcontroller
14
globally programmed as either push-pull or open-drain. The POR resets with the
eight bits of Port 2 configured as inputs.
Port 2 also has an 8-bit input OR and an AND gate, which can be used to wake up
the part. P20 can be programmed to access the edge-detection circuitry in
demodulation mode. See Figure 7.
Z86D86
MCU
Port 2 I/O
Open-Drain
I/O
EPROM
Option
V_CC
200 KOhms +50%
resistive transistor
pull-ups
Pad
Out
In
Figure 7. Port 2 Configuration
Port 3 (P37–P31)
Port 3 is a 7-bit, CMOS-compatible fixed I/O port (see Figure 8). Port 3 consists of
three fixed input (P33–P31) and four fixed output (P37–P34) ports, and each can
be configured under software control for interrupt, and output from the counter/
PS008905-0105
PRELIMINARY