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 CMOS static design

◆ 8-bit data bus

◆ On chip ROM size : 512 words for MDT2005

◆ Internal RAM size : 32 bytes (25 general purpose registers, 7 special registers)

◆ 36 single word instructions

◆ 14-bit instructions

◆ 2-level stacks

◆ Operating voltage : 2.3V ~ 5.5 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 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.