Cale:OKDatasheet > Semiconductor Date > Atmel Datasheet > T89C51RD2-SMRC-M
T89C51RD2-SMRC-M spec.: 0 to 40 MHz flash programmable 8-bit microcontroller, 80C52 compatible, 8051 pin and instruction compatible, 256 bytes RAM, EEPROM 2Kbytes, flash 64Kbytes