APU428 datasheet(1/18 Pages) APLUS

No. de pieza	APU428

Descripción Electrónicos	4-Bit Micro-controller With LCD Driver

PDF	18 Pages

Scroll/Zoom	100%

Fabricante Electrónico	APLUS [Aplus Intergrated Circuits]

Página de inicio	http://www.aplusinc.com.tw

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4-Bit Micro-controller With LCD Driver

Features

Low power dissipation

Powerful instruction set (148 instructions)

Binary addition, subtraction, BCD

adjustment, logical operation in direct

addressing mode and index

addressing mode

Single-bit manipulation (set, reset, decision

for branch)

Various conditional branches

16 working registers and manipulation

LCD driver data transfer

Look-up table

Programmable option

System clock selection

Memory capacity

Instruction ROM capacity 2048 x 16 bits

Index ROM capacity 256 x 8 bits

Internal RAM capacity 256 x 4 bits

(low-address 128 nibbles can be accessed

by direct addressing, full-range 256 nibbles

can be accessed by index addressing)

Input/output ports

Port IOA 4 pins (with internal pull-low,

chattering clock, MUX with CX, RR, RT, RH/

SEG 37~40 by mask option)

Port IOB 4 pins (MUX with ELC, ELP, BZB,

BZ/SEG41, 42 by mask option)

Port IOC 4 pins (with internal pull-low,

low-level hold, chattering clock, MUX option

with AN1~4 by mask option)

Port IOD 4 pins (MUX with PWM1,

2/SEG33~36 by mask option)

8-level subroutine nesting

Interrupt function

External factor 2 (INT pin & port IOA, IOC

input)

Internal factor 4 (predivider, 2 timers & RFC)

Built-in EL-light driver, alarm, frequency or

melody generator (MUX with IOB/ SEG41, 42)

Built-in R to F converter circuit (MUX with

IOA/SEG37~40)

Built-in comparator, 6/8-bit PWM output, 4-bit

D/A converter, low-battery detector; this

structure can be used as a 4/6/8-bit full range

ADC

Port PWM 2 pins (MUX with SEG35, 36)

Port ADC 4 pins (MUX with IOC)

2 6-bit programmable timers with programmable

clock source

Watchdog timer

LCD/LED driver output

42 LCD/LED driver outputs (up to 168 LCD

segments are drivable)

Mask option is used to select static, 1/2 bias

1/2 duty, 1/2 bias 1/3 duty, 1/2 bias 1/4 duty,

1/3 bias 1/3 duty and 1/3 bias 1/4 duty drive

modes of the LCD panel

Mask option is used to select DC output,

and static, 1/2 duty, 1/3 duty and 1/4 duty

drive modes of the LED panel

Mask option is used to select SEG28~32 as

P open-drain DC outputs

Single instruction stops all segments that

are either in LCD or LED

Built-in voltage doubler, halver, tripler charge

pump circuit

Dual clock operation

HALT function

Stop function

General Description

APU428 is an embedded high-performance 4-bit

microcomputer with an LCD/LED driver. It contains

all the necessary functions in a single chip: 4-bit

parallel processing ALU, ROM, RAM, I/O ports, timer,

clock generator, dual clock, ADC, RFC, alarm,

EL-light, LCD driver, look-up table and watchdog

timer. The instruction set consists of 148 instructions

which include nibble operation, manipulation,

various conditional branch instructions and LCD

data transfer instructions which are powerful and

easy to follow.

The HALT function stops any internal operations other

than the oscillator, divider and LCD driver in order to

minimize the power dissipation.

The stop function stops all clocks in the chip.

Preliminary

1

Ver. 0.0

APU428

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