Low-Voltage/Low-PowerCopyright SiliconLaboratories 11.11.2008 Port DriversDigital Peripherals UART Timers PCA/WDT SMBus Priority Crossbar Decoder P0.0/VREF P0.1/AGND P0.2/XTAL1 P0.3/XTAL2 P0.4/TX P0.5/RX P0.6/CNVSTR P0.7/IREF0 Crossbar Control Port ConfigurationCIP-51 8051 Controller Core 32k Byte ISP Flash Program Memory 256 Byte SRAM SFR Bus 4096 Byte XRAM Port Drivers