STMicroelectronics STM32WL55x 32-Bit Wireless Long-Range MCUs
STMicroelectronics STM32WL55x 32-Bit Wireless Long-Range MCUs embed a powerful and ultra-low-power LPWAN-compliant radio solution that enables LoRa®, (G)FSK, (G)MSK, and BPSK modulations. The microcontrollers are low-power and based on the high-performance Arm® Cortex®-M4 32-bit RISC core operating at a frequency of up to 48MHz. The core implements a full set of DSP instructions and is complemented by an Arm Cortex-M0+ microcontroller. Both cores implement an independent memory protection unit (MPU) that refines the application security. STMicroelectronics STM32WL55x 32-bit Wireless Long-Range MCUs integrate a 12-bit ADC, a 12-bit DAC low-power sample-and-hold, and two ultra-low-power comparators associated with a high-accuracy reference voltage generator. These devices operate at -40°C to +105°C from a 1.8V to 3.6V power supply.
Features
- ECOPACK2-compliant package
- Radio
- Frequency range of 150MHz to 960MHz
- Modulation of LoRa, (G)FSK, (G)MSK and BPSK
- 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 the following radio frequency regulations such as 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
- Compatible with standardized or proprietary protocols such as LoRaWAN, Sigfox™, W-MBus, and more (fully open wireless system-on-chip)
- Ultra-low-power platform
- 1.8V to 3.6V power supply
- -40°C to +105°C temperature range
- Shutdown mode of 31nA (VDD = 3V)
- Standby (+ RTC) mode of 360nA (VDD = 3V)
- Stop2 (+ RTC) mode of 1.07µA (VDD = 3V)
- Active-mode MCU of <72µA/MHz (CoreMark®)
- Active-mode RX of 4.82mA
- Active-mode TX of 15mA at 10dBm and 87mA at 20dBm (LoRa 125kHz)
- 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
- 1.25 DMIPS/MHz (Dhrystone 2.1)
- 32-bit Arm Cortex-M0+ CPU
- Frequency up to 48MHz, MPU
- 0.95DMIPS/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)
- Key management services
- Secure sub-GHz MAC layer
- Secure firmware update (SFU)
- Secure firmware install (SFI)
- 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)
- VBAT mode with RTC and 20x32-byte backup registers
- Clock sources
- 32MHz crystal oscillator
- TCXO support of programmable supply voltage
- 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
- 256Kbyte flash memory
- 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
- Mailbox and semaphores for communication between Cortex-M4 and Cortex-M0+ firmware
- 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
- Dual CPU cross-trigger capabilities
Applications
- LPWAN wireless
- Industrial Internet of Things (IoT)
- Consumer IoT
Content Stream
Videos
Block Diagram
Development Tools
STMicroelectronics STM32WL Nucleo-64 Board (NUCLEO-WL55JC)
Try new concepts and build prototypes for LoRa™ applications with the STM32WL Series.
STMicroelectronics STEVAL-ASTRA1B Asset Tracking Evaluation Board
Reference design that simplifies prototyping, testing, and evaluating asset tracking applications.
STMicroelectronics B-WL5M-SUBG1 LoRaWAN® Connectivity Expansion Board
Ideal for prototyping the STM32WL5MOC microcontroller module.
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