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<7:4> 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.