STM32WL55JCI6

STM32WL55JCI6 is a single‑chip STM32WL microcontroller from STMicroelectronics that combines an ARM Cortex‑M4 MCU with an integrated sub‑GHz RF transceiver. It targets ultra‑low‑power, long‑range IoT applications and supports sub‑GHz wireless modes (LoRa, FSK, GFSK, OOK) in bands like 868/915 MHz for LoRaWAN or private networks. The MCU runs up to about 64 MHz, with on‑chip flash and RAM, plus standard STM32 peripherals (GPIO, timers, ADC/DAC, UART/SPI/I2C) and a hardware crypto engine with RNG for security. It offers secure boot and protection features. Development is supported by STM32CubeWL, LoRaWAN stacks, and common IDEs (CubeIDE, Keil, IAR). Typical uses include battery‑powered sensors, asset tracking, smart metering, and industrial automation that require long‑range communication with low power. The device simplifies wireless design by combining MCU and RF in one package, reducing BOM and footprint.

Key features of STM32WL55JCI6:
- MCU: ARM Cortex-M4 core with FPU/DSP, up to 64 MHz.
- Wireless: integrated sub-GHz RF transceiver (LoRa/FSK/OOK); bands 868/915 MHz; programmable RF parameters; up to +20 dBm TX; LoRaWAN-ready.
- Memory: up to 256 KB Flash and 64 KB RAM.
- Security: hardware crypto accelerators (AES-128/256, SHA-2), RNG, secure boot and secure firmware update.
- Peripherals: broad mix including GPIO, multiple timers, ADC (12-bit), DAC, USART/UART, I2C, SPI, DMA.
- Power: ultra-low-power design with multiple sleep modes; wide operating voltage 1.65–3.6 V.
- Package options: available in LQFP and UFBGA variants to fit space needs.
- Software: STM32CubeWL with LoRaWAN stack and radio driver support, plus ST development tools.

- Pin count: 100 pins (LQFP-100 package).
- Function: STM32WL55JCI6 is a single-chip 32‑bit MCU (ARM Cortex‑M4) with an integrated sub‑GHz RF transceiver (LoRa/FSK/Sigfox) for wireless IoT applications, plus memory and peripherals.

- Manufacturer: STMicroelectronics (STMicroelectronics N.V.)
- What kind of company: A Franco-Italian multinational semiconductor company and one of the world’s largest, designing and manufacturing microcontrollers (including STM32), MEMS/sensors, analog and power devices, and other semiconductor products.

STM32WL55JCI6 combines a Cortex-M4 MCU with a sub-GHz LoRa/FSK radio, ideal for IoT/LPWAN with long range and low power. Key application areas:
- Smart metering (gas, electric, water)
- Asset tracking and logistics
- Industrial automation and predictive maintenance
- Agriculture and environmental sensing
- Smart city/building automation (lighting, security, remote control)
- Telemetry and remote monitoring of infrastructure
- Wireless sensor networks and distributed sensing
Note: leverages LoRa/FSK for flexible long-range communication with embedded security features.

LQFP-64 package (64‑pin), about 7×7 mm.