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 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 ~ 6.0 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 (por), only available while ped is disable ? power edge-detector reset ? sleep mode for power saving ? 4 oscillator start-up time : 150 μs, 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 3. applications the application areas of this mdt2020 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. 深圳市美芯微电子有限公司专业从事集成电路代理分销以及嵌入式系统方案开发.目前我公司主要代理:台湾麦肯（mdt）系列单片机　mcu;销售产品涵盖4位.8位.单片机;麦肯单片机完全兼pic,pic的软件可直接烧录，软件和板都不用做改动。稳定性好，性价比高,满足不同层次的需要，在家电.仪器.仪表.安防系统.汽车电子及医疗器械等领域拥有广泛。 mdt兼容pic mdt2005（mdt10p05)完全兼容pic16c54 cf745 pic16f54 mdt2010(mdt10p10) 完全兼容pic16c56 pic16f56 mdt2020(mdt10p20）/mdt10p257 完全兼容pic16c57 cf775 pic16c57 mdt2030 完全兼容pic16c58 pic16f58 mdt2051 完全兼容pic16c711 pic16f711 mdt10p53 完全兼容pic12c508 pic12f509 mdt10p509 完全兼容pic12c508 mdt10p55 完全兼容pic16c505 mdt10p61 兼容pic16c61 mdt10p62 兼容pic16c62 mdt10p651 兼容pic16c65 mdt10p72 兼容pic16c72 mdt10p73 兼容pic16c73 mdt10p74 兼容pic16c74 mdt10p621 兼容pic16c63 mdt10p64 兼容pic16c64 mdt10p57 兼容pic16c671 mdt10p84 兼容pic16p84 mdt10f630 兼容pic12f676 mdt10p676 兼容pic12f676