Z87C33 datasheet(13/72 Pages) ZILOG

Part #	Z87C33

Description	CMOS Z8짰 MCU Consumer Controller Processor

PDF	72 Pages

Scroll/Zoom	100%

Manufacturer	ZILOG [Zilog, Inc.]

Direct Link	http://www.zilog.com

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13 / 72 page

PS015601-1003

Z87C33

CMOS Z8“ MCU Consumer Controller Processor

Figure 4.Port 2 Configuration

Port 3 (P37–P30).

Port 3 is an 8-bit, CMOS-compatible port, with four fixed inputs

(P33–P30) and four fixed outputs (P34–P37). Port 3 is configured under software

control for Input/Output, Counter/Timers, interrupt, and UART. Port 3, bit 0 input is

Schmitt-triggered, and pins P31, P32, and P33 are standard CMOS inputs (no

autolatches). Pins P34, P35, P36, P37 are push-pull output lines. Low-EMI output

buffers are globally programmed by the software.

Two onboard comparators process analog signals on P31 and P32 with reference

to the voltage on P33. The analog function is enabled by programming Port 3

Port 2 (I/O)

Open

Out

PAD

Auto Latch

1.5

2.3 Hysteresis VCC @ 5.0V

R ~

~ 500 kΩ

Open Drain

(Mask Option)

Z87C33 Datasheet(PDF) 13 Page - Zilog, Inc.