SILICON LABS C8051F931-G-GM

Single/Dual Battery, 0.9–3.6 V, 64/32 kB, SmaRTClock, 10-Bit ADC MCU

• 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 supply monitors (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 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
• 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, nonintrusive 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×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 self-oscillate mode
• Can switch between clock sources on-the-fly; useful in implementing various power saving modes