STMicroelectronics STM32WLE5/E4xx 32-bit Wireless Long-Range MCUs

STMicroelectronics STM32WLE4xx and STM32WLE5xx 32-bit Wireless Long-Range MCUs embed a powerful and ultra-low-power-radio-compliant LPWAN radio solution consisting of (G)FSK, (G)MSK, BPSK, and LoRa® (STM32WLE5x only). The STM32WLE5/E4xx MCUs are designed to be extraordinarily low-power and are based on the high-performance Arm® Cortex®-M4 32-bit RISC core, operating at a frequency of up to 48MHz. The Arm core implements a full set of DSP instructions and an independent memory protection unit (MPU) that enhances the application security. STMicroelectronics STM32WLE5/E4xx 32-bit Wireless Long-Range MCUs integrate high-speed memories, enhanced I/Os and peripherals, 12-bit ADC, 12-bit DAC low-power sample-and-hold, and two ultra-low-power comparators associated with a high-accuracy reference voltage generator.

Features

Radio
- 150MHz to 960MHz frequency range
- LoRa, (G)FSK, (G)MSK and BPSK modulation
- RX sensitivity of –123dBm for 2-FSK (at 1.2Kbit/s), –148dBm for LoRa (at 10.4kHz, spreading factor 12)
- Transmitter high output power, programmable up to +22dBm
- Transmitter low output power, programmable up to +15dBm
- Compliant with ETSI EN 300 220, EN 300 113, EN 301 166, FCC CFR 47 Part 15, 24, 90, 101 and the Japanese ARIB STD-T30, T-67, T-108
Ultra-low-power platform
- 1.8V to 3.6V power supply
- -40°C to +105°C temperature range
- Shutdown mode of 31nA (V_DD = 3V)
- Standby (+ RTC) mode of 360nA (V_DD = 3V)
- Stop2 (+ RTC) mode of 1.07µA (V_DD = 3V)
- <72µA/MHz (CoreMark®) Active-mode MCU
- 4.82mA active-mode RX
- 15mA at 10dBm and 87mA at 20dBm (LoRa 125kHz) active-mode TX
Core
- 32-bit Arm Cortex-M4 CPU
- Adaptive real-time accelerator (ART accelerator) allowing 0-wait-state execution from flash memory, frequency up to 48MHz, MPU and DSP instructions
- 1.25DMIPS/MHz (Dhrystone 2.1)
Security and identification
- Hardware encryption AES 256-bit
- True random number generator (RNG)
- Sector protection against read/write operations (PCROP, RDP, WRP)
- CRC calculation unit
- Unique device identifier (64-bit UID compliant with IEEE 802-2001 standard)
- 96-bit unique die identifier
- Hardware public key accelerator (PKA)
Supply and reset management
- High-efficiency embedded SMPS step-down converter
- SMPS to LDO smart switch
- Ultra-safe, low-power BOR (brownout reset) with 5 selectable thresholds
- Ultra-low-power POR/PDR
- Programmable voltage detector (PVD)
- V_BAT mode with RTC and 20x32-byte backup registers

Clock sources
- 32MHz crystal oscillator
- Programmable supply voltage TCXO support
- 32kHz oscillator for RTC with calibration
- High-speed internal 16MHz factory trimmed RC (±1%)
- Internal low-power 32kHz RC
- Internal multi-speed low-power 100kHz to 48MHz RC
- PLL for CPU, ADC, and audio clocks
Memories
- Up to 256Kbyte flash memory
- Up to 64Kbyte RAM
- 20x32-bit backup register
- Bootloader supporting USART and SPI interfaces
- Over-the-air (OTA) firmware update capable
- Sector protection against read/write operations
Rich analog peripherals (down to 1.62V)
- 12-bit ADC 2.5Msps, up to 16 bits with hardware oversampling, conversion range up to 3.6V
- 12-bit DAC, low-power sample-and-hold
- 2x ultra-low-power comparators
System peripherals
- Semaphores for processor firmware process synchronization
Controllers
- 2x DMA controller (7 channels each) supporting ADC, DAC, SPI, I²C, LPUART, USART, AES, and timers
- 2x USART (ISO 7816, IrDA, SPI)
- 1x LPUART (low-power)
- 2x SPI 16 Mbit/s (1 over 2 supporting I2S)
- 3x I²C (SMBus/PMBus)
- 2x 16-bit 1-channel timer
- 1x 16-bit 4-channel timer (supporting motor control)
- 1x 32-bit 4-channel timer
- 3x 16-bit ultra-low-power timer
- 1x RTC with 32-bit sub-second wakeup counter
- 1x independent SysTick
- 1x independent watchdog
- 1x window watchdog
Up to 43 I/Os, most 5V tolerant
Development support
- Serial-wire debug (SWD), JTAG for the application processor
ECOPACK2 compliant