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MDT10P257 
1. General Description
 This EPROM-Based 8-bit micro-controller uses a fully static CMOS design technology to combine higher speed and smaller size with the low power and high noise immunity.
On chip memory system includes 2.0 K words of ROM, and 80  bytes of static RAM.
 
2. 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 : 2 K words
Internal RAM size : 80 bytes(72 general purpose, 8 special registers)
36 single word instructions
14-bit instructions
2-level stacks
Operating voltage : 2.3 V ~ 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
instructions.
Addressing modes include direct,indirect and relative addressing modes
Power-on Reset (POR)
4 types of power edge-detector reset:
1.8v , 2.1v , always enable 1.8v and Disable
Sleep mode for power saving
2 oscillator start-up time :
EXT-R、RC：150 μs,20ms
XT、LF     ：20ms,80ms 
8-bit real time clock/counter(RTCC) with 8-bit programmable prescaler
4 types of oscillator can be selected by user options :
RC－Low cost RC oscillator
LFXT－Low frequency crystal oscillator
XTAL－Standard crystal oscillator
EXT-R－Low cost R oscillator
On-chip RC oscillator based Watchdog
Timer(WDT) can be operated freely
20 I/O pins with their own independent direction control
20 I/O pins own independent weak pull-high and can be enabled by software.
WDT can be enabled by software if   WDT Disable is selected in user option.
 
3. Applications
This MDT10P257 can be used in appliance motor control, high speed automotive, low power remote transmitters/receivers, pointing devices,and telecommunications processors. Such as Remote controller, small instruments, chargers, toy, automobile and PC peripheral … etc.