Overview
The STM32WB55CGU6, produced by STMicroelectronics, is a cutting-edge microcontroller that integrates the features of the STM32L4 Arm® Cortex®-M4 core-based microcontrollers with an on-chip 2.4 GHz radio managed by a dedicated Arm® Cortex®-M0+ co-processor. This dual-core architecture enables the concurrent execution of wireless protocols and application code in real time, while maintaining ultra-low power consumption. This makes it an ideal solution for a wide range of applications requiring both high performance and low power consumption.
Key Specifications
| Parameter | Specification |
|---|---|
| Manufacturer | STMicroelectronics |
| Part Number | STM32WB55CGU6 |
| Package Type | UFQFPN-48 |
| Mounting Method | Surface Mount |
| Operating Voltage | 1.71 V to 3.6 V |
| Operating Temperature | -40 °C to 85 °C / 105 °C |
| Flash Memory | Up to 1 MB |
| SRAM | Up to 256 KB |
| Radio Frequency | 2.4 GHz |
| Radio Protocols | Bluetooth® 5.4, IEEE 802.15.4-2011, Thread 1.3, Zigbee® 3.0 |
| Power Consumption | 13 nA in shutdown mode, 600 nA in standby mode + RTC + 32 KB RAM |
| ADC Resolution | 12-bit, up to 16-bit with hardware oversampling |
| Communication Interfaces | USART, SPI, I2C, USB 2.0 FS, Quad-SPI |
Key Features
- Ultra-low-power platform: Features such as 13 nA shutdown mode, 600 nA standby mode + RTC + 32 KB RAM, and adaptive voltage scaling to minimize power consumption.
- Dual-core architecture: Combines an Arm® Cortex®-M4 core with a dedicated Arm® Cortex®-M0+ co-processor for real-time radio layer management.
- Integrated balun: Reduces the Bill of Materials (BOM) and simplifies the design process.
- Advanced radio capabilities: Supports Bluetooth® 5.4, IEEE 802.15.4-2011, Thread 1.3, and Zigbee® 3.0 with programmable output power up to +6 dBm.
- Rich analog peripherals: Includes a 12-bit ADC, ultra-low-power comparators, and a high accuracy reference voltage generator.
- Comprehensive communication interfaces: USART, SPI, I2C, USB 2.0 FS, and Quad-SPI with execute-in-place (XIP) capability.
- Power management: Independent power supplies for analog inputs, a high efficiency SMPS step-down converter, and a VBAT dedicated supply for backup functions.
Applications
- Remote sensors: Ideal for IoT applications requiring wireless communication and low power consumption.
- Wearable trackers: Suitable for fitness trackers, smartwatches, and other wearable devices.
- Building automation controllers: Used in smart home and building automation systems for wireless control and monitoring.
- Computer peripherals: Can be used in wireless keyboards, mice, and other computer peripherals.
- Drones: Suitable for drone applications requiring low power consumption and wireless communication.
- IoT devices: General-purpose use in various IoT devices that require wireless connectivity and low power consumption.
Q & A
- What is the operating voltage range of the STM32WB55CGU6?
The operating voltage range is from 1.71 V to 3.6 V.
- What radio protocols does the STM32WB55CGU6 support?
The device supports Bluetooth® 5.4, IEEE 802.15.4-2011, Thread 1.3, and Zigbee® 3.0.
- What is the power consumption in shutdown mode?
The power consumption in shutdown mode is 13 nA.
- Does the STM32WB55CGU6 have integrated balun?
Yes, it has an integrated balun to reduce the Bill of Materials (BOM).
- What is the maximum flash memory available on the STM32WB55CGU6?
The maximum flash memory available is up to 1 MB.
- What are the key features of the analog peripherals on the STM32WB55CGU6?
The device includes a 12-bit ADC, ultra-low-power comparators, and a high accuracy reference voltage generator.
- What communication interfaces are available on the STM32WB55CGU6?
The device supports USART, SPI, I2C, USB 2.0 FS, and Quad-SPI with execute-in-place (XIP) capability.
- Can the STM32WB55CGU6 operate with external power sources for backup functions?
Yes, it has a VBAT dedicated supply that allows the device to back up the LSE 32.768 kHz oscillator, the RTC, and the backup registers using a CR2032-like battery or a small rechargeable battery.
- What are some typical applications of the STM32WB55CGU6?
Typical applications include remote sensors, wearable trackers, building automation controllers, computer peripherals, drones, and various IoT devices.
- Does the STM32WB55CGU6 support over-the-air updates?
Yes, it supports over-the-air (OTA) updates for Bluetooth® Low Energy and 802.15.4.
