AT89C51RC2-3CSIM [Microchip]

The AT89C51RB2/RC2 retains all features of the 80C52 with 256 Bytes of internal RAM, a 9-source 4-level interrupt controller and three timer/counters. It features a Programmable Counter Array, 1024 Bytes XRAM, Hardware Watchdog Timer, Keyboard Interface, SPI Interface, enhanced UART, and X2 mode for speed improvement. The Flash memory supports ISP programming and offers 100K write cycles. The fully static design allows power consumption reduction via Idle and Power-down modes. It includes low EMI features and operates at frequencies up to 60 MHz.