APU428 View Datasheet(PDF) - APLUS INTEGRATED CIRCUITS

Part Name

Description

Manufacturer

APU428

4-Bit Micro-controller With LCD Driver

APLUS INTEGRATED CIRCUITS 

Pad Name

IOB1~4

IOC1~4

IOD1~4

RFC

RR

RT

RH

EL

ELP

CC

ELC

ALM BZB

Z

GND

APU428

I/O

Description

I/O Input/Output port B.

I/O IOB1, 2 shares pins with SEG41, 42, or ELC, ELP and is set by mask option.

IOB3, 4 shares pins with BZ, BZB and is set by mask option.

I/O Input/Output port C can use software to define the internal pull-low/

I/O low-level hold resistor and chattering clock in order to reduce input bounce and

generate interrupt. This port shares pins with AN1-4 and is set by mask option.

Input / Output port D.

I/O This port shares pins with SEG33~36 and is set by mask option.

IOD3,4 shares pins with PWM1,2 and is set by mask option.

I 1 input pin and 3 output pins for RFC application.

O This port shares pins with SEG37~40 and is set by mask option.

O This port shares pins with IOA1~4 and is set by mask option.

O

O Output port for the EL-light.

O These ports share pins with SEG41, 42 and are set by mask option.

These ports share pins with IOB1, 2 and are set by mask option.

O Output port for alarm, frequency or melody generator.

O This port shares pins with IOB3,4 and is set by mask option.

Negative supply voltage.

Preliminary

5

Ver. 0.0

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