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. 以上内容由阿里产品库提供完善信息 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。公司设有专门的软件开发中心,拥有一批电子工程专业人才,有着雄厚的技术实力，能为广大客户提供强有力的技术支持和完善的售前售后服务; 同时极具竟争力的产品价格和短的开发周期,更是广大客户为满意的服务要求。 我们的目标是成为所在领域的行家里手,熟悉客户方案需求,了解客户的需求,以专业的精神,为客户提供专业化的服务;坚持开放与合作的原则,与业界上下游厂商精诚合作,互惠互利,共同努力为客户创造更大的价值。