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概要

This EPROM-Based 8-bit micro-controller uses a fully static CMOS technology process to achieve higher speed and smaller size with the low power consump-tion and high noise immunity. On chip memory incl-udes 1K words of ROM, and 68 bytes of static RAM.

特点

The followings are some of the features on the hardware and software :

◆Fully CMOS static design;

◆8-bit data bus;

◆On chip EPROM size : 1K words;

◆Internal RAM size : 84 bytes(68general purpose registers, 16 special registers);

◆37 single word instructions;

◆14-bit instructions;

◆8-level stacks;

◆Operating voltage : 2.5V ~ 5.5 V(PRD disable); 4.5V ~ 5.5 V(PRD Enable);

◆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

◆Power range-detector Reset

◆Sleep Mode for power saving

◆Four interrupt sources:

--External INT pin

--TMR0 timer

--A/D conversion completion

--PortB interrupt on change

◆A/D converter module:

--Four analog inputs multiplexed into one A/D converter

--8-bit resolution

◆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

◆8-bit real time clock/counter(RTCC) with 8-bit programmable prescaler

◆On-chip RC oscillator based Watchdog Timer (WDT)

◆13 I/O pins with their own independent direction control