Отправлено AK 18 января 2002 г. 06:24 В ответ на: Ну уж чего-чего, а клонов х51 - выше крыши (а Вы что, встречали клоны PIC и AVR?) отправлено Black Eagle 17 января 2002 г. 18:14

MDT2020A

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 :
- Fully COMS 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 : 2.5 V ~ 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
- 4 oscillator start-up time : 150 ms, 20 ms, 40 ms, 80 ms
- 8-bit real time clock/counter(RTCC) with 8-bit programmable prescaler
- 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
- On-chip RC oscillator based Watchdog Timer(WDT) can be operated freely
- 20 I/O pins with their own independent direction control

• http://www.g-alantic.com.tw/pdf/2020A.pdf

• Also STK99010 — AK   (18.01.2002 07:20, пустое, ссылка)