日本富士通公司、半导体开发部今年推出MB88400H/410H/420H新产品系列,它们是最小指令时间为1.5μs的nMOS4位单片微计算机。另外还有MB88500H系列,它们是CMOS 4位单片微计算机。这四个机种的内设RAM容量从192字×4比特增加到256字,ROM容量最小4K字节,在基片上集成有功率起动,复原电路和掉电检出复原 Japan’s Fujitsu Ltd. and Semiconductor Development Corp. introduced the MB88400H / 410H / 420H new product families this year, the nMOS 4-bit single-chip microcomputer with a minimum instruction time of 1.5μs. There are also MB88500H series, they are CMOS 4-bit single-chip microcomputer. The built-in RAM capacity of these four models is increased from 192 words × 4 bits to 256 words, and the ROM capacity is a minimum of 4 Kbytes. Integrated power start-up and recovery circuits and brownout detection and recovery