General Description

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.

Features

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

◆ Fully CMOS static design

◆ 8-bit data bus

◆ On chip EPROM size : 1.0 K words

◆ Internal RAM size : 84 bytes

(68 general purpose registers, 16 special registers)

◆ 37 single word instructions

◆ 14-bit instructions

◆ 8-level stacks

◆ Operating voltage : 2.5 V ~ 5.5 V (PRD Disable)

4.5 V ~ 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

Applications

The application areas of this MDT2051 range from appliance motor control and high speed automotive to low power remote transmitters/receivers, pointing devices, and telecommunications processors, such as Remote controller, small instruments, chargers, toy, automobile and PC peripheral … etc.