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The STM32WL31KBV6 is a radio frequency microcontroller launched by (ST), featuring an Arm Cortex-M0+ core with a main frequency of 64MHz, and equipped with 64KB of flash memory and 16KB of SRAM. This chip belongs to the STM32WL series and supports wireless communication in the Sub-GHz frequency band, making it suitable for low-power scenarios.

The STM32WL31KBV6 mainly features the following:

Based on the Arm Cortex-M0 + core

A single chip, with a package size as low as 5mm x 5mm, integrated:

Two radio - sub-GHz multi-modulation radio and wideband wake radio

LCD driver and LC sensor control are used for flowmeter measurement

A simple yet super flexible platform that supports multiple modulations

4-(G) FSK up to 600Kbps, 2-(G) FSK, (G) MSK, DBPSK, DSSS, OOK and ASK

The IQ interface is used for developing user modulation to enhance flexibility

Flexible radio data packet processing program

The main radio provides long-distance connection, with a receiving sensitivity of up to -132 dBm and a programmable transmission power of up to +20 dBm

Frequency coverage

159 MHz to 185 MHz

413 MHz to 479 MHz

826 MHz to 958 MHz

Low-power radio as low as 5.6 mA (Rx) and 10 mA (10 dBm Tx at full SoC current consumption)

Additional radio-specific wake with A 4.2 µA normally open receiver for system wake

Supports a wide frequency band from 100 MHz to 2.4 GHz

Extend battery life by reducing the power consumption of wireless applications (low power consumption feature)

It can achieve a battery life of 10 years and energy harvesting in many applications

By using a single platform to support multiple communication protocols (excluding LoRa), the R&D work is reduced

Optimize the bill of materials (BOM), reduce the floor space occupied by terminal devices, and lower design complexity

Application scenarios

The STM32WL31KBV6 wireless microcontroller is mainly targeted at scenarios such as smart metering, logistics tracking, and smart city monitoring that require long-distance, low-power wireless connections.

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