STMicroelectronics has introduced the STM32WL3R, a wireless microcontroller designed for battery-powered remote-control units used in consumer devices and home-automation systems. The device builds on the STM32WL3 sub-GHz platform and integrates a low-power RF transceiver, multiple power-saving modes, and six wake-up pins to support efficient operation in compact handheld designs.
Developed with Somfy for use in next-generation building-automation remotes and sensors, the MCU combines a small footprint with extended battery lifetime. The integrated transceiver supports the 315 MHz band used by North American remote controls as well as the 850 MHz and 950 MHz ISM bands for global regulatory compliance. The transmitter requires only 10 mA to deliver 10 dBm output power, supporting low-energy operation in systems that demand frequent wireless signaling.
The STM32WL3R includes dedicated low-power states that shut down unused circuitry while retaining RAM to reduce wake-up latency. Ultra-deep stop mode draws 450 nA while preserving 16 KB of RAM, and shutdown mode reduces consumption to 14 nA with up to six independent wake-up inputs. These capabilities reduce energy demand while maintaining fast system response for user-interface functions.
The availability of six wake-up pins enables more complex remote-control layouts and simplifies the reuse of PCB designs across multiple product variants. The MCU is supplied in a 5 mm × 5 mm QFN32 package and is available in production quantities. Pricing starts at $1.2654 in orders of 10,000 units through the eStore and authorized distributors.
Leave a Reply