General Description

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

On chip memory system includes 0.5 K(for MDT2005) bytes of ROM, and 32 bytes of static RAM.

Features

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

Fully COMS static design

8-bit data bus

On chip ROM size : 512 words for MDT2005

Internal RAM size : 32 bytes(25 general pur pose registers, 7 special registers)

36 single word instructions

14-bit instructions

2-level stacks

Operating voltage : 2.3V ~ 6.3 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

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 can be selected by programming option: 150 ms, 20 ms, 40 ms, 80 ms

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

12 I/O pins with their own independent direction control

Applications

The application areas of this MDT2005 range from appliance motor control and high speed

automot ive to low power remote transmitters/receivers, pointing devices, and

elecommunications processors, such as Remote controller, small instruments, chargers, toy,

automobile and PC peripheral … etc.