Product Features 8-bit ADC (C8051F300/2 only): Up to 500 ksps Up to 8 external inputs Programmable amplifier gain of 4, 2, 1, and 0.5 VREF from external pin or VDD Built-in temperature sensor External conversion start input Comparator: Programmable hysteresis and response time Configurable as interrupt or reset source Low current (<0.5 μA) On-chip debugging: On-chip debug circuitry facilitates full-speed, non-intrusive in-system debugging (no emulator required) Provides breakpoint, single-step execution, check/modify memory and register functions Performance superior to emulation systems using ICE chips, target kits, and sockets Full development kit provided Supply voltage: 2.7 to 3.6 V Typical operating current: 6.6 mA @ 25 MHz; 14 μA @ 32 kHz Typical stop mode current: 0.1 μA Temperature range: -40 to +85 °C High-speed 8051 μc core: Pipelined instruction architecture; 70% of instructions execute in 1 or 2 system clocks Up to 25 MIPS throughput at 25 MHz clock Extended interrupt handler Memory: 256 bytes internal data RAM Up to 8 kB (C8051F300/1/2/3), 4 kB (C8051F304), or 2 kB (C8051F305) Flash; 512 bytes reserved in 8 kB devices Digital peripherals: 8-port I/O; all ports 5 V tolerant, high sink current Hardware-enhanced UART and SMBus serial ports Three general-purpose 16-bit counters/timers 16-bit programmable counter array (PCA), with three capture/compare modules Real-time clock mode using PCA or timer and external clock source Clock sources: Internal oscillator: 24.5 MHz, ±2% accuracy, supports UART operation External oscillator: crystal, RC, C, or clock (1 or 2-pin mode) Real-time clock source switching; useful in power-saving modes 11-pin QFN or 14-pin SOIC package QFN size = 3x3 mm