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32-bit MCU med on-chip 2,5 GHz radio

Med sigte på bl.a. trådløse sensorsystemer lancerer STMicroelectronics 32-bit MCU, hvor der er integreret 2,4 GHz radio (in english).

STMicroelectronics (ST) has extended its STM32 microcontroller portfolio by introducing the STM32W family, which features an integrated IEEE 802.15.4 radio to deliver a true System-on-Chip (SoC) platform supporting embedded wireless sensor network design.

IEEE 802.15.4 is an open standard for low-power, low-data-rate radio in the unlicensed 2.4GHz band, and is widely used in communication and networking applications such as smart energy metering, home automation, security and monitoring equipment, and remote controls. The ZigBee Alliance has specified IEEE 802.15.4 as the radio platform for the industry-standard ZigBee protocol, which is popular in applications such as sensor networking and automatic meter reading.

ST’s new STM32W family implements the IEEE 802.15.4 physical (PHY) layer as well as the Media Access Control (MAC) layer, giving developers the flexibility to target ZigBee-compliant specifications or to build any network wireless protocol which interfaces with the standardized IEEE802.15.4 MAC.

Other well known protocols include ZigBee RF4CE for radio-frequency remote controls or 6LoWPAN for wireless embedded Internet solutions. Software support for the STM32W family includes libraries for the latest ZigBee PRO specification, as well as ZigBee RF4CE, and the IEEE 802.15.4 MAC.

The new devices combine the benefits of a  radio platform with the added performance, flexibility and scalability of the STM32 microcontroller architecture. The STM32 portfolio is a microcontroller product range featuring the advanced 32-bit ARM Cortex-M3 processor.

The STM32W is a true SoC combining best-in-class IEEE 802.15.4 RF performance as well as 32-bit processing. The devices can transmit up to 7dBm output power and support up to 107dB link budget, achieve up to –100dBm receiver sensitivity, and allow coexistence with nearby Wi-Fi and Bluetooth networks, which also operate in the 2.4GHz frequency band.

Performance highlights of the STM32W family include low power consumption, drawing as little as 27mA in receive mode and 31mA in transmit mode, and implementing a 1µA Deep-Sleep mode to aid power management. Special features supporting wireless applications include 8Kbyte SRAM, 128Kbyte Flash for code storage, and embedded AES encryption with hardware acceleration.

General-purpose resources include a flexible ADC, an SPI/UART/TWI serial interface, multiple timers, and 24 GPIOs with Schmitt-trigger inputs. Single-voltage operation from 2.1V to 3.6V simplifies design, while high integration also saves external components. Only a single 24MHz crystal is required, or an optional 32.768kHz crystal for increased timer accuracy. There is also support for an external power amplifier.

The smart combination of a best-in-class 2.4GHz radio and powerful 32-bit machine brings outstanding network system performance and associated low-power operation enhancing battery life time.

The STM32W family is available in a 6 x 6mm 40-pin QFN package pin-to-pin compatible with the SN260, or a 7 x 7mm 48-pin QFN compatible with the SN250. Pricing begins at $2.90 for quantities over 100,000 units with ZigBee PRO feature-set.

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