STM32WL55JCI6 ARM-Cortex®-M4+M0 MCU, 32 bit, 1.8-3.6 V, 256 KB,UFBGA-73

Multiprotocol LPWAN dual core 32-bit Arm® Cortex®-M4/M0+ LoRa®, (G)FSK, (G)MSK, BPSK, up to 256KB Flash, 64KB SRAM

Description: The STM32WL55/54xx long-range wireless and ultra-low-power devices embed a powerful and ultra-low-power LPWAN-compliant radio solution, enabling the following modulations: LoRa®, (G)FSK, (G)MSK, and BPSK. The LoRa® modulation is available in STM32WLx5xx only. These devices are designed to be extremely low power and are based on the high-performance Arm® Cortex®-M4 32-bit RISC core operating at a frequency of up to 48 MHz. This core implements a full set of DSP instructions. It is complemented by an Arm® Cortex®-M0+ microcontroller. Both cores implement an independent memory protection unit (MPU) that enhances the application security.

Features

Radio - Frequency range: 150 MHz to 960 MHz - Modulation: LoRa®, (G)FSK, (G)MSK and BPSK - RX sensitivity: -123 dBm for 2-FSK (at 1.2 Kbit/s), -148 dBm for LoRa® (at 10.4 kHz, spreading factor 12) - Transmitter high output power, programmable up to +22 dBm - Transmitter low output power, programmable up to +15 dBm - 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 - 1.8 V to 3.6 V power supply - -40 °C to +105 °C temperature range - Shutdown mode: 31 nA (VDD = 3 V) - Standby (+ RTC) mode: 360 nA (VDD = 3 V) - Stop2 (+ RTC) mode: 1.07 µA (VDD = 3 V) - Active-mode MCU: < 72 µA/MHz (CoreMark®) - Active-mode RX: 4.82 mA - Active-mode TX: 15 mA at 10 dBm and 87 mA at 20 dBm (LoRa® 125 kHz)

Core - 32-bit Arm® Cortex®-M4 CPU - Adaptive real-time accelerator (ART Accelerator) allowing 0-wait-state execution from Flash memory, frequency up to 48 MHz, MPU and DSP instructions - 1.25 DMIPS/MHz (Dhrystone 2.1) - 32-bit Arm®Cortex®-M0+ CPU - Frequency up to 48 MHz, MPU - 0.95 DMIPS/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 - 32 MHz crystal oscillator - TCXO support: programmable supply voltage - 32 kHz oscillator for RTC with calibration - High-speed internal 16 MHz factory trimmed RC (± 1 %) - Internal low-power 32 kHz RC - Internal multi-speed low-power 100 kHz to 48 MHz RC - PLL for CPU, ADC and audio clocks

Memories - 256-Kbyte Flash memory - 64-Kbyte RAM - 20x32-bit backup register - Bootloader supporting USART and SPI interfaces - OTA (over-the-air) firmware update capable - Sector protection against read/write operations

Rich analog peripherals (down to 1.62 V) - 12-bit ADC 2.5 Msps, up to 16 bits with hardware oversampling, conversion range up to 3.6 V - 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 5 V-tolerant

Development support - Serial-wire debug (SWD), JTAG - Dual CPU cross trigger capabilities

All packages ECOPACK2 compliant