MDT2020(DF)

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http;//www.mdtic.com.tw

P. 1

2005/6

VER 1.3

1. General Description

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.

2. Features

The followings are some of the features on

the hardware and software :

u Fully CMOS static design

u 8-bit data bus

u On chip ROM size : 2 K words

u Internal RAM size : 80 bytes

(72 general purpose, 8 special registers)

u 36 single word instructions

u 14-bit instructions

u 2-level stacks

u Operating voltage : 2.3 V ~ 5.5 V

u Operating frequency : 0 ~ 20 MHz

u The most fast execution time is 200 ns

under 20 MHz in all single cycle

instructions

except

the

branch

instruction.

u Addressing modes include direct,

indirect and relative addressing modes

u Power-on Reset

u Power Edge-detector Reset

u Sleep mode for power saving

u 4 oscillator start-up time :

150

µs, 20 ms, 40 ms, 80 ms

u 8-bit real time clock/counter(RTCC) with

8-bit programmable prescaler

u 4 types of oscillator can be selected by

code options :

RC－Low cost RC oscillator

LFXT－Low frequency crystal oscillator

XTAL－Standard crystal oscillator

HFXT－High frequency crystal oscillator

u On-chip RC oscillator based Watchdog

Timer(WDT) can be operated freely

u 20 I/O pins with their own independent

direction control

3. Applications

The application areas of this MDT2020

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.