STM32L471RET6

Ultra-low-power ARM® Cortex®-M4 32-bit MCU+FPU, 100DMIPS, up to 1MB Flash, 128KB SRAM, with analog and audio capabilities.

Key features

• Ultra-low-power with FlexPowerControl
• 1.71V to 3.6V power supply
• -40°C to 85/105/125°C temperature range
• 300 nA in VBAT mode: supply for RTC and 32x32-bit backup registers
• 30 nA Shutdown mode (5 wakeup pins)
• 120 nA Standby mode (5 wakeup pins)
• 420 nA Standby mode with RTC
• 1.1 μA Stop 2 mode, 1.4 μA Stop 2 with RTC
• 100 μA/MHz run mode
• Batch acquisition mode (BAM)
• 4 μs wakeup from Stop mode
• Brown out reset (BOR) in all modes except shutdown
• Interconnect matrix
• Core: ARM 32-bit Cortex-M4 CPU with FPU, Adaptive real-time accelerator (ART Accelerator™) allowing 0-wait-state execution from Flash memory, frequency up to 80 MHz, MPU, 100DMIPS/1.25DMIPS/MHz (Dhrystone 2.1), and DSP instructions
• Clock Sources:
• 4 to 48 MHz crystal oscillator
• 32 kHz crystal oscillator for RTC (LSE)
• Internal 16 MHz factory-trimmed RC (±1%)
• Internal low-power 32 kHz RC (±5%)
• Internal multispeed 100 kHz to 48 MHz oscillator, auto-trimmed by LSE (better than ±0.25% accuracy)
• 3 PLLs for system clock, audio, ADC
• RTC with HW calendar, alarms and calibration
• Up to 24 capacitive sensing channels: support touchkey, linear and rotary touch sensors
• 16x timers: 2x16-bit advanced motor-control, 2x32-bit and 5x16-bit general purpose, 2x 16-bit basic, 2x low-power 16-bit timers (available in Stop mode), 2x watchdogs, SysTick timer
• Up to 114 fast I/Os, most 5 V-tolerant, up to 14 I/Os with independent supply down to 1.08 V
• Up to 1 MB Flash, 2 banks read-whilewrite, proprietary code readout protection
• Up to 128 KB of SRAM including 32 KB with hardware parity check
• External memory interface for static memories supporting SRAM, PSRAM, NOR and NAND memories
• Quad SPI memory interface
• 4x digital filters for sigma delta modulator
• Rich analog peripherals (independent supply):
• 3x 12-bit ADC 5 Msps, up to 16-bit with hardware oversampling, 200 μA/Msps
• 2x 12-bit DAC, low-power sample and hold
• 2x operational amplifiers with built-in PGA
• 2x ultra-low-power comparators
• 17x communication interfaces:
• 2x SAIs (serial audio interface)
• 3x I²C FM+(1 Mbit/s), SMBus/PMBus
• 6x USARTs (ISO 7816, LIN, IrDA, modem)
• 3x SPIs (4x SPIs with the Quad SPI)
• CAN (2.0B Active) and SDMMC interface
• SWPMI single wire protocol master I/F
• 14-channel DMA controller
• True random number generator
• CRC calculation unit, 96-bit unique ID
• Development support: serial wire debug (SWD), JTAG, Embedded Trace Macrocell™