Analog Peripherals - 12-Bit ADC • ±1 LSB INL; no missing codes • Programmable throughput up to 200 ksps • Up to 24 external inputs • Data dependent windowed interrupt generator • Built-in temperature sensor (±3 °C) - Two 12-Bit Current Mode DACs - Two Comparators • Programmable hysteresis and response time • Configurable as wake-up or reset source - POR/Brownout Detector - Voltage Reference—1.5, 2.2 V (programmable) On-Chip Debug - On-chip debug circuitry facilitates full-speed, nonintrusive in-system debug (No emulator required) - Provides breakpoints, single stepping - Inspect/modify memory and registers - Complete development kit Supply Voltage 2.0 to 5.25 V - Built-in LDO regulator: 2.1 or 2.5 V High Speed 8051 µC Core - Pipelined instruction architecture; executes 70% of instructions in 1 or 2 system clocks - Up to 50 MIPS throughput with 50 MHz system clock - Expanded interrupt handler Memory - 2304 bytes internal data RAM (256 + 2048) - 32/16 kB Flash; In-system programmable in 512 byte sectors - 64 bytes battery-backed RAM (smaRTClock) Digital Peripherals - 24 port I/O; push-pull or open-drain, up to 5.25 V tolerance - Hardware SMBus™ (I2C™ Compatible), SPI™, and UART serial ports available concurrently - Four general purpose 16-bit counter/timers - Programmable 16-bit counter/timer array with six capture/compare modules, WDT - Hardware smaRTClock operates down to 1 V with 64 bytes battery-backed RAM and backup voltage regulator Clock Sources - Internal oscillators: 24.5 MHz 2% accuracy supports UART operation; clock multiplier up to 50 MHz - External oscillator: Crystal, RC, C, or Clock (1 or 2 pin modes) - smaRTClock oscillator: 32 kHz Crystal or self-resonant oscillator - Can switch between clock sources on-the-fly 32-PIN LQFP or 28-PIN 5x5 QFN Temperature Range: –40 to +85 °C