80C51 8-bit microcontroller family 8K-4K/256-1K OTP/ROM/ROMless, low voltage (2.7V-5.5V), low power, high speed (33 MHz)80C51的8位单片机系列8K , 4K / 256-1K OTP / ROM /无ROM ,低电压( 2.7V - 5.5V ) ,低功耗,高速( 33兆赫)