Introduction
Ultra-low power: Operating voltage 0.9 to 3.6 V. Typical sleep mode current < 0.1 μA, retaining state and RAM contents across the full supply range; wake-up time < 2 μs. RTC operating current less than 600 nA, less than 1 μA with RTC running and radio state retained. On-chip DC-DC converter allows operation down to 0.9 V. Two integrated brown-out detectors covering both sleep and active modes.
10-bit ADC: Up to 300 ksps, up to 18 external inputs, supports external pin or internal VREF (no external capacitor required), integrated temperature sensor, optional external conversion start input, autonomous burst mode with 16-bit automatic averaging accumulator.
Dual comparators: Programmable hysteresis and response time, configurable as interrupt or reset source, low current (< 0.5 μA).
On-chip debug: On-chip debug circuitry supports full-speed, non-intrusive in-system debugging (no emulator required), with breakpoints and single-step execution, inspect/modify memory and registers, complete development kit included.
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: 4352 bytes internal data RAM (256 + 4096), 64 kB (Si1000/2/4) or 32 kB (Si1001/3/5) flash; in-system programmable in 1024-byte sectors, 1024 bytes reserved in 64 kB devices.
EZRadioPRO transceiver: Frequency range = 240–960 MHz, sensitivity = -121 dBm, FSK, GFSK, and OOK modulation, maximum output power = +20 dBm (Si1000/1), +13 dBm (Si1002/3/4/5), RF current consumption: 18.5 mA RX, 18 mA TX at +1 dBm, 30 mA TX at +13 dBm, 85 mA TX at +20 dBm, data rate = 0.123 to 256 kbps, automatic frequency calibration (AFC), antenna diversity and TX/RX switch control, programmable packet handler, 64-byte TX and RX FIFOs, frequency hopping capability, on-chip crystal tuning.
Digital peripherals: 19 or 16 port I/O plus 3 GPIO pins; hardware-enhanced UART, SPI, and I²C serial ports available simultaneously, low-power 32-bit SmaRTClock, four general-purpose 16-bit counter/timers, six-channel programmable counter array (PCA).
Clock sources: Precision internal oscillator: 24.5 MHz, ±2% accuracy, UART operation supported; spread-spectrum mode for reduced EMI; low-power 20 MHz internal oscillator. External oscillator: crystal, RC, C, CMOS clock. SmaRTClock oscillator: 32.768 kHz crystal or self-oscillating. Real-time switching between clock sources to facilitate various power-saving modes.
Package: 42-pin LGA (5 × 7 mm), temperature range: -40 to +85°C.
