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概要

This EPROM-Based 8-bit micro-controller uses a fully static CMOS design technology combines higher speed and smaller size with the low power and high noise immunity of CMOS.

On chip memory system includes 2.0 K bytes of ROM, and 80 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 ROM size : 2K words;

◆Internal RAM size : 80 bytes(70 general purpose registers, 8 special registers);

◆36 single word instructions;

◆14-bit instructions;

◆2-level stacks;

◆Operating voltage : 2.3V ~ 6.0 V;

◆Operating frequency : 0 ~ 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(POR), only available while PED is Disable

◆Power edge-detector Reset

◆Sleep Mode for power saving

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

◆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

◆4 oscillator start-up time :

--150μs,20 ms, 40 ms, 80 ms

◆On-chip RC oscillator based Watchdog Timer (WDT)can be operated freely

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