STM32L451RET6TR

Ultra-low-power Arm® Cortex®-M4 32-bit MCU+FPU, 100DMIPS, up to 512KB Flash, 160KB 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 85/125 °C temperature range
• 145 nA in VBAT mode: supply for RTC and 32x32-bit backup registers
• 22 nA Shutdown mode (5 wakeup pins)
• 106 nA Standby mode (5 wakeup pins)
• 375 nA Standby mode with RTC
• 2.05 μA Stop 2 mode, 2.40 μA with RTC
• 84 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
• 335 ULPMark CP score
• 104 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)
• Internal 48 MHz with clock recovery
• 2 PLLs for system clock, audio, ADC
• Up to 83 fast I/Os, most 5 V-tolerant
• RTC with HW calendar, alarms and calibration
• Up to 21 capacitive sensing channels: support touchkey, linear and rotary touch sensors
• 12x timers: 1x16-bit advanced motor-control, 1x32-bit and 3x 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 512 KB single bank Flash, proprietary code readout protection
• 160 KB of SRAM including 32 KB with hardware parity check
• Quad SPI memory interface
• Rich analog peripherals (independent supply)
• 1x 12-bit ADC 5 Msps, up to 16-bit with hardware oversampling, 200 μA/Msps
• 1x 12-bit DAC output channels, low-power sample and hold
• 1x operational amplifier with built-in PGA
• 2x ultra-low-power comparators
• Accurate 2.5 V or 2.048 V reference voltage buffered output
• 16x communication interfaces
• 1x SAI (serial audio interface)
• 4x I²C FM+(1 Mbit/s), SMBus/PMBus
• 3x USARTs (ISO 7816, LIN, IrDA, modem)
• 1x UART (LIN, IrDA, modem)
• 1x LPUART (Stop 2 wake-up)
• 3x SPIs (and 1x Quad SPI)
• CAN (2.0B Active) and SDMMC interface
• IRTIM (Infrared interface)
• 14-channel DMA controller
• Development support: serial wire debug (SWD), JTAG, Embedded Trace Macrocell
• All packages are ECOPACK2 compliant