Overview
The STM32WL55JCI6, produced by STMicroelectronics, is a sub-GHz wireless microcontroller that integrates a powerful and ultra-low-power LPWAN-compliant radio solution. This device is part of the STM32WL55/54xx series, which features dual-core Arm Cortex-M4 and Cortex-M0+ processors operating at up to 48 MHz. The Cortex-M4 core includes DSP instructions and an adaptive real-time accelerator (ART Accelerator) for 0-wait-state execution from flash memory. The device is designed for extreme low-power consumption and includes high-speed memories such as 256 Kbytes of flash memory and 64 Kbytes of SRAM.
The STM32WL55JCI6 supports various modulations including LoRa®, (G)FSK, (G)MSK, and BPSK, and is compliant with multiple radio frequency regulations. It also features advanced security mechanisms, including hardware encryption, a true random number generator, and secure firmware update capabilities.
Key Specifications
| Parameter | Specification |
|---|---|
| Processor Cores | Dual-core Arm Cortex-M4 and Cortex-M0+ |
| Operating Frequency | Up to 48 MHz |
| Flash Memory | 256 Kbytes |
| SRAM | 64 Kbytes |
| Power Supply | 1.8 V to 3.6 V |
| Operating Temperature | –40 °C to +105 °C |
| Radio Frequency Range | 150 MHz to 960 MHz |
| Modulation | LoRa®, (G)FSK, (G)MSK, BPSK |
| RX Sensitivity | –123 dBm for 2-FSK, –148 dBm for LoRa® |
| Transmitter Output Power | Programmable up to +22 dBm (high), +15 dBm (low) |
| ADC | 12-bit, up to 16 bits with hardware oversampling |
| DAC | 12-bit, low-power sample-and-hold |
| Comparators | 2 ultra-low-power comparators |
| Timers | 16-bit and 32-bit timers, including ultra-low-power timers |
| Communication Interfaces | USARTs, LPUART, SPI, I2C, etc. |
| Security Features | Hardware encryption AES 256-bit, true random number generator, secure firmware update |
Key Features
- Ultra-Low Power Consumption: Shutdown mode: 31 nA, Standby (+ RTC) mode: 360 nA, Stop2 (+ RTC) mode: 1.07 µA, Active-mode MCU: < 72 µA/MHz.
- Advanced Radio Capabilities: Supports LoRa®, (G)FSK, (G)MSK, and BPSK modulations, with high sensitivity and programmable output power.
- Security and Identification: Hardware encryption AES 256-bit, true random number generator, sector protection, and secure firmware update capabilities.
- Analog Peripherals: 12-bit ADC, 12-bit DAC, and ultra-low-power comparators.
- Communication Interfaces: Includes USARTs, LPUART, SPI, I2C, and more for versatile communication options.
- Power Management: High-efficiency SMPS step-down converter, independent power supplies for analog inputs, and VBAT mode for backup functions.
Applications
- Industrial Automation: Suitable for low-power, wireless industrial automation applications due to its robust security features and ultra-low power consumption.
- IoT Devices: Ideal for Internet of Things (IoT) devices requiring long-range wireless communication and low power consumption.
- Asset Tracking: Can be used in asset tracking applications that require precise location tracking and low power consumption.
- Smart Metering: Applicable in smart metering systems that need secure, low-power wireless communication.
Q & A
- What is the operating frequency of the STM32WL55JCI6?
The operating frequency of the STM32WL55JCI6 is up to 48 MHz.
- What types of modulation does the STM32WL55JCI6 support?
The STM32WL55JCI6 supports LoRa®, (G)FSK, (G)MSK, and BPSK modulations.
- What is the power supply range for the STM32WL55JCI6?
The power supply range is from 1.8 V to 3.6 V.
- What are the key security features of the STM32WL55JCI6?
The key security features include hardware encryption AES 256-bit, true random number generator, and secure firmware update capabilities.
- What are the available communication interfaces on the STM32WL55JCI6?
The device includes USARTs, LPUART, SPI, I2C, and more.
- What is the temperature range for the STM32WL55JCI6?
The operating temperature range is –40 °C to +105 °C.
- How does the STM32WL55JCI6 manage power consumption?
The device features various power-saving modes, including shutdown, standby, and stop modes, along with a high-efficiency SMPS step-down converter.
- What types of timers are available on the STM32WL55JCI6?
The device includes 16-bit and 32-bit timers, as well as ultra-low-power timers.
- Is the STM32WL55JCI6 compatible with standardized wireless protocols?
Yes, it is compatible with protocols such as LoRaWAN®, Sigfox™, and W-MBus.
- What is the RX sensitivity of the STM32WL55JCI6 for LoRa® modulation?
The RX sensitivity for LoRa® is –148 dBm at 10.4 kHz with a spreading factor of 12.
