STM32L471RET3

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

Key features

• Ultra-low-power with FlexPowerControl
• 1.71 V to 3.6 V 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 with RTC
• 100 μA/MHz run mode
• Batch acquisition mode (BAM)
• 4 μs wakeup from Stop mode
• Brown out reset (BOR)
• 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 and DSP instructions
• Performance benchmark 1.25 DMIPS/MHz (Drystone 2.1) 273.55 CoreMark (3.42 CoreMark/MHz @ 80 MHz)
• Energy benchmark 294 ULPMark CP score 106 ULPMark PP score
• 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
• Up to 114 fast I/Os, most 5V-tolerant, up to 14 I/Os with independent supply down to 1.08 V
• RTC with HW calendar, alarms and calibration
• Up to 24 capacitive sensing channels: support touchkey, linear and rotary touch sensors
• 16x timers: 2x 16-bit advanced motor-control, 2x32-bit and 5x 16-bit general purpose, 2x 16-bit basic, 2x low-power 16-bit timers (available in Stop mode), 2x watchdogs, SysTick timer
• Memories: Up to 1 MB Flash, 2 banks read-while-write, 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 output channels, low-power sample and hold
• 2x operational amplifiers with built-in PGA
• 2x ultra-low-power comparators
• 19x communication interfaces: 2x SAIs (serial audio interface), 3x I2C FM+(1 Mbit/s), SMBus/PMBus, 5x USARTs (ISO 7816, LIN, IrDA, modem), 1x LPUART (Stop 2 wake-up), 3x SPIs (and 1x Quad SPI), CAN (2.0B Active) and SDMMC interface, SWPMI single wire protocol master I/F, IRTIM (Infrared interface)
• 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
• All packages are ECOPACK2 compliant