1. General Description

This 8-bit micro-controller uses a fully static CMOS

technology process to achieve higher speed and

smaller size with the low power consumption and high

noise immunity. On chip memory includes 4K words of

FLASH ROM, and 256 bytes of EEPROM, and 192

bytes of static RAM.

2. Features

The followings are some of the features on the

hardware and software :

‹ Fully CMOS static design

‹ 8-bit data bus

‹ On chip FLASH ROM size: 4.0 K words

‹ Internal RAM size: 192 bytes

‹ 256 bytes of EEPROM

‹ 37 single word instructions

‹ 14-bit instructions

‹ 8-level stacks

‹ Operating voltage:

2.5 V ~ 5.5 V (NORMAL)

4.5 V ~ 5.5 V (PED High level)

‹ Operating frequency: DC ~ 20 MHz

‹ The most fast execution time is 200 ns under

20 MHz in all single cycle instructions except

the branch instruction

‹ Addressing modes include direct, indirect and

relative addressing modes

‹ Power-on Reset

‹ Power edge-detector Reset

Low level around 1.8V.

Middle level around 2.1V.

High level around 3.8V.

‹ Sleep Mode for power saving

‹ Capture, Compare, PWM module

Synchronous serial port with SCM

‹ 12 interrupt sources:

-External INT pin

-TMR0 timer, TMR1 timer, TMR2 timer

-A/D conversion completion

-Port B<7:4> interrupt on change

-EEPROM interrupt

-CCP1, CCP2, SCM, USAR, USAT

‹ A/D converter module:

-5 analog inputs multiplexed into one A/D

converter

-8 bit resolution

‹ TMR0: 8-bit timer/counter

TMR1: 16-bit timer/counter

TMR2: 8-bit timer

‹ 4 types of oscillator can be selected by

programming option:

RC－Low cost RC oscillator

LFXT－Low frequency crystal oscillator

XTAL－Standard crystal oscillator

HFXT－High frequency crystal oscillator

‹ On-chip RC oscillator based Watchdog Timer

(WDT)

‹ 22 I/O pins with their own independent

direction control

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