Description
AT89C4051 – 8051 Family AT89C2051 Series Microcontrollers – Fully static operation from 0Hz to 24MHz -4KB of reprogrammable flash memory – 128 x 8bit internal RAM 15 programmable I/O lines – two 16bit timer/counters – Six interrupt sources – Operating voltage range from 4V to 6V – Programmable serial UART channel.
PDF: AT89C4051 Datasheet
