80C51 8-bit microcontroller family 8K.64K/256.1K OTP/ROM/ROMless, low voltage 2.7V.5.5V, low power, high speed 33 MHz80C51的8位微控制器系列8K.64K / 256.1K OTP / ROM /无ROM ,低电压2.7V.5.5V ,低功耗,高速33兆赫