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CXP84120/84124

Symbol

I/O

Description

I/O

PG0 to PG7

(Port G)

8-bit I/O port. I/O can be set in a unit of single bits. Incorporation of pull-

up resistor can be set through the software in a unit of 4 bits.

(8 pins)

I/O

PH0 to PH7

(Port H)

8-bit I/O port. I/O can be set in a unit of single bits. Incorporation of pull-

up resistor can be set through the software in a unit of 4 bits.

(8 pins)

I/O/Input

PI0/INT0

to

PI3/INT3

I/O

PI4 to PI7

Input

Crystal connectors for system clock oscillation. When the clock is supplied

externally, input to EXTAL; opposite phase clock should be input to XTAL.

EXTAL

Output

XTAL

Input

Crystal connectors for 32kHz timer/counter clock generation circuit.

Connect a 32kHz crystal oscillator between TEX and TX.

For usage as event input, connect clock oscillation source to TEX, and

open TX.

TEX

Output

TX

Input

Low-level active, system reset.

RST

NC

Input

Reference voltage input for A/D converter.

A/D converter GND.

AVss

Positive power supply.

GND

Vss

(Port I)

8-bit I/O ports. I/O can be set in a unit of single

bit. Incorporation of pull-up resistor can be set

through the software in a unit of 4 bits.

(8 pins)

External interruption

request inputs.