Atmel AT89LP51RD2

The Atmel AT89LP51RD2 is an 8051-based single-cycle microcontroller with 20 MIPS and dual data pointer, 64KBytes ISP Flash ROM, 256 Bytes RAM, 2KBytes XRAM, 512 Signature array, 2KByte On-chip Bootloader, Interrupt system with 14 sources and 4 priority levels, 16x16 Multiply Accumulate Unit, Digital-to-Analog (DAC) or Analog-to-Digital (ADC) with 7 10-Bit single ended channels, 2 Analog comparators, On-chip 2-cycle Hardware Multiplier, Three 16-Bit Timer/Counter, Seven 8-Bit PWM channels, 16-bit Programmable Counter Array, 1 UART, 1 SPI (Master/Slave), 1 I2C interface with 400 kBit/s, Watchdog Timer, Keyboard Interface, Two-wire On-Chip Debug Interface, Internal 8 MHz RC Oscillator, 1 On-chip Configurable Oscillator, 8-bit Clock Prescaler, Brown-out Detection and Power-on Reset unit and up to 40 Programmable I/O Lines.