Supply Voltage 0.9 to 3.6 V

• One-Cell Mode supports 0.9 to 1.8 V operation
• Two-Cell Mode supports 1.8 to 3.6 V operation
• Built-in dc-dc converter with 1.8 to 3.3 V output for use in one-cell mode
• Built-in LDO regulator allows a high analog supply voltage and low digital core voltage
• 2 built in brownout detectors

10-Bit Analog to Digital Converter

• ±1 LSB INL; no missing codes
• Programmable throughput up to 300 ksps
• Up to 23 external inputs
• On-Chip 1.65 V ±TBD Voltage Reference
• On-Chip PGA allows measuring voltages up to twice the reference voltage.
• 16-bit Auto-Averaging Accumulator with Burst Mode provides increased ADC resolution.
• Data dependent windowed interrupt generator
• Built-in temperature sensor (±3 °C)

Two Comparators

• Programmable hysteresis and response time
• Configurable as wake-up or reset source
• Up to 23 Capacitive Touch Sense Inputs

6-Bit Programmable Current Reference

• Up to ±500 μA. Can be used as a bias or for generating a custom reference voltage.

On-Chip Debug

• On-chip debug circuitry facilitates full-speed, non-intrusive in-system debug (No emulator required)
• Provides breakpoints, single stepping
• Inspect/modify memory and registers
• Complete development kit

High-Speed 8051 μC Core

• Pipelined instruction architecture; executes 70% of instructions in 1 or 2 system clocks
• Up to 25 MIPS throughput with 25 MHz clock
• Expanded interrupt handler

Memory

• 4352 bytes internal data RAM (256 + 4096)
• 64 kB (‘F93x) or 32 kB (‘F92x) Flash; In-system programmable in 1024-byte sectors—1024 bytes are reserved in the 64 kB devices

Digital Peripherals

• 24 or 16 port I/O; All 5 V tolerant with high sink current and programmable drive strength-Hardware SMBus™ (I2C™ Compatible), 2 x 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 and watchdog timer
• Hardware smaRTClock operates down to 0.9 V and requires less than 0.5 μA supply current.

Clock Sources

• Internal oscillators: 24.5 MHz, 2% accuracy supports UART operation; 20 MHz low power oscillator requires very little bias current.
• External oscillator: Crystal, RC, C, or CMOS Clock
• smaRTClock oscillator: 32 kHz Crystal or internal
• Can switch between clock sources on-the-fly; useful in implementing various power saving modes

Packages

• 32-pin QFN (5 x 5 mm)
• 24-pin QFN (4 x 4 mm)
• 32-pin LQFP (easy to hand-solder)

Temperature Range: –40 to +85 °C