STM32WL55CCU6 STM32 32-bit Arm Cortex MCUs by STMicroelectronics

Sub-GHz Wireless Microcontrollers. Dual-core Arm Cortex-M4/M0+ @48 MHz with 256 Kbytes of Flash memory, 64 Kbytes of SRAM. LoRa, (G)FSK, (G)MSK, BPSK modulations. AES 256-bit. Multiprotocol System-on-Chip.

Status: Active
Series: STM32WL55CC
RoHS: Compliant
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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. The devices embed high-speed memories (256-Kbyte Flash memory, 64-Kbyte SRAM), and an extensive range of enhanced I/Os and peripherals. The devices also embed several protection mechanisms for embedded Flash memory and SRAM: readout protection, write protection and proprietary code readout protection. In addition, the STM32WL55/54xx devices support the following secure services running on Arm ® Cortex-M0+: unique boot entry capable, secure sub-GHz MAC layer, secure firmware update, secure firmware install and storage and management of secure keys. These devices offer a 12-bit ADC, a 12-bit DAC low-power sample-and-hold, two ultra-low-power comparators associated with a high-accuracy reference voltage generator. The devices embed a low-power RTC with a 32-bit sub-second wakeup counter, one 16-bit single-channel timer, two 16-bit four-channel timers (supporting motor control), one 32-bit four-channel timer and three 16-bit ultra-low-power timers. These devices also embed two DMA controllers (7 channels each) allowing any transfer combination between memory (Flash memory, SRAM1 and SRAM2) and peripheral, using the DMAMUX1 for flexible DMA channel mapping.

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Prices starting from US$5.40

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Features

Includes ST state-of-the-art patented technology
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)
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)
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)
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)
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)
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)
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-bit backup registers
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-bit 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
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
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
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
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
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
Serial-wire debug (SWD), JTAG
Dual CPU cross trigger capabilities
All packages ECOPACK2 compliant

Resources


Application Notes
AN3126 Audio and waveform generation using the DAC in STM32 products
AN4894 EEPROM emulation techniques and software for STM32 microcontrollers
AN1709 EMC design guide for STM8, STM32 and Legacy MCUs
AN5612 ESD protection of STM32 MCUs and MPUs
AN1181 Electrostatic discharge sensitivity measurement
AN5543 Enhanced methods to handle SPI communication on STM32 devices
AN4776 General-purpose timer cookbook for STM32 microcontrollers
AN5556 Getting started with STM32WL5x MCUs using IAR Embedded Workbench® and MDK-ARM
AN4750 Handling of soft errors in STM32 applications
AN4803 High-speed SI simulations using IBIS and board-level simulations using HyperLynx® SI on STM32 MCUs and MPUs
AN5406 How to build a LoRa® application with STM32CubeWL
AN5480 How to build a Sigfox™ application with STM32CubeWL
AN2834 How to get the best ADC accuracy in STM32 microcontrollers
AN4229 How to implement a vocoder solution using STM32 microcontrollers
AN5027 Interfacing PDM digital microphones using STM32 MCUs and MPUs
AN5156 Introduction to STM32 microcontrollers security
AN5408 Migrating from STM32L0, STM32L1, and STM32L4 Series associated with SX12xx transceivers to STM32WL Series microcontrollers
AN5407 Optimized RF board layout for STM32WL Series
AN2867 Oscillator design guide for STM8AF/AL/S, STM32 MCUs and MPUs
AN5042 Precise HSE frequency and startup time tuning for STM32 wireless MCUs
AN5457 RF matching network design guide for STM32WL Series
AN5664 RSSI and SNR for LoRa® modulation on STM32WL Series
AN4286 SPI protocol used in the STM32 bootloader
AN4992 STM32 MCUs secure firmware install (SFI) overview
AN4013 STM32 cross-series timer overview
AN4899 STM32 microcontroller GPIO hardware settings and low-power consumption
AN2606 STM32 microcontroller system memory boot mode
AN5409 STM32Cube MCU Package examples for STM32WL Series
AN5796 STM32WL Series RF bench
AN2639 Soldering recommendations and package information for Lead-free ECOPACK MCUs and MPUs
AN5036 Thermal management guidelines for STM32 applications
AN3155 USART protocol used in the STM32 bootloader
AN5225 USB Type-C Power Delivery using STM32 MCUs and MPUs
AN5568 Ultra-low-power features of STM32WL Series microcontrollers
AN4759 Using the hardware real-time clock (RTC) and the tamper management unit (TAMP) with STM32 microcontrollers
AN5690 VREFBUF peripheral applications and trimming technique
AN4655 Virtually increasing the number of serial communication peripherals in STM32 applications





Application Notes for related Tools & Software
Atollic Editing Keyboard Shortcuts
AN4841 Digital signal processing for STM32 microcontrollers using CMSIS
AN4894 EEPROM emulation techniques and software for STM32 microcontrollers
FreeRTOS Guide
AN5361 Getting started with projects based on dual-core STM32H7 microcontrollers in STM32CubeIDE
AN5564 Getting started with projects based on dual-core STM32WL microcontrollers in STM32CubeIDE
AN5394 Getting started with projects based on the STM32L5 Series in STM32CubeIDE
AN5360 Getting started with projects based on the STM32MP1 Series in STM32CubeIDE
AN5406 How to build a LoRa® application with STM32CubeWL
AN5480 How to build a Sigfox™ application with STM32CubeWL
AN5418 How to build a simple USB-PD sink application with STM32CubeMX
How to do semihosting in TrueSTUDIO
AN5682 How to secure LoRaWAN® and Sigfox™ with STM32CubeWL
Installing STM32Cubeprogrammer in TrueSTUDIO
AN5544 Integration guide of SBSFU on STM32CubeWL (including KMS)
AN5481 LoRaWAN® AT commands for STM32CubeWL
AN5554 LoRaWAN® firmware update over the air with STM32CubeWL
AN5687 Long-packet operation with STM32CubeWL
AN5426 Migrating graphics middleware projects from STM32CubeMX 5.4.0 to STM32CubeMX 5.5.0
AN5042 Precise HSE frequency and startup time tuning for STM32 wireless MCUs
AN5566 RF certification process for NUCLEO-WL55JC
AN4502 STM32 SMBus/PMBus™ embedded software expansion for STM32Cube™
AN4657 STM32 in-application programming (IAP) using the USART
AN5409 STM32Cube MCU Package examples for STM32WL Series
STM32CubeMX Installation in TrueSTUDIO
AN5731 STM32CubeMX and STM32CubeIDE thread-safe solution
AN5054 Secure programming using STM32CubeProgrammer
TrueSTUDIO for ARM® Migration Guide: IAR Embedded Workbench to TrueSTUDIO
AN4759 Using the hardware real-time clock (RTC) and the tamper management unit (TAMP) with STM32 microcontrollers



Alternative Descriptions

STM32WL Series LPWAN Dual Core ARM Cortex-M4/M0 + Full Set of Modulation + LoRa | Future Electronics
MCU, 32BIT, 256KB, UFQFPN-48 | element14
Mcu, 32Bit, 256Kb, Ufqfpn-48 Rohs Compliant: Yes |Stmicroelectronics STM32WL55CCU6 | Newark Electronics
STM32WL55CCU6, 32-Bit LPWAN Lora MCU | RS
MCU-Application Specific 32 bit, 48 MHz, 1.8 V to 3.6 V in, 256KB, UFQFPN-48 | EBV Elektronik


Frequently Asked Questions

Where can I find additional details, specifications and documents for a STM32WL55CCU6?

Additional datasheets, footprints and schematics for STM32WL55CCU6 are listed on our Part Details page. You can also find images and similar parts to STM32WL55CCU6 on this page.

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What category does STM32WL55CCU6 fall under?

The STM32WL55CCU6 is listed under Microcontrollers & Microprocessors > STM32 32-bit Arm Cortex MCUs > STM32 Wireless MCUs > STM32WL Series > STM32WL5x.

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You can view similar parts to STM32WL55CCU6 when available in the STM32WL5x range under the specifications section at the bottom of the details page.

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Is the STM32WL55CCU6 RoHS compliant?

Yes. This part has been flagged as RoHS Compliant by STMicroelectronics.

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