The Analog Devices ADuC841 is an 8051 based controller with High-Speed Core, 8-channel true 12-bit ADC, Dual 16-bit DAC's, WDT, SPI, UART, On-chip DMA controller, 32 I/O lines, 3 Timers/Counters, WDT, SPI, UART, Dual Data Pointers, Timer, 62K Flash EEPROM Program Memory, 2K Data Flash EEPROM, 2304 Bytes On-chip RAM, RAM banking up to 16M Bytes external address space, UART,SPI, I2C, brown out detect.