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Wireless sol'ns from Freescale target ZigBee systems

Posted: 10 Oct 2012 ?? ?Print Version ?Bookmark and Share

Keywords:Cortex? Kinetis KW20? MCU? MC13242? dual-PAN?

Freescale Semiconductor has announced a dual-PAN (personal area network) functionality in its new generation of wireless solutions. The dual-PAN capability in the company's Kinetis KW20 wireless MCU allows a single device to seamlessly connect and actively participate in two separate networks, noted the company.

The ARM Cortex-M4-based KW20 wireless MCU has up to 512KB of flash and 64KB of SRAM, providing enough memory to run both network protocol stacks on a single device and eliminating the need for a second MCU.

Freescale's hardware implementation maintains key network information for two networks, including the PAN ID, short and long network addresses and the RF channel, allowing the device to rapidly change between networks in as little as 64?s. This results in a 5x performance improvement over software implementations and significantly reduces network traffic and latency while lowering overall power consumption, boasted Freescale. In addition, the KW20 can function as a coordinator, a router or an end device on each network. If both networks are operating on the same RF channel, then the KW20 can filter network information on the fly, completely eliminating the need to switch between networks.

For ultimate flexibility, Freescale also offers an individual IEEE 802.15.4 radio transceiver with the same high-performance characteristic as the radio inside the KW20, including dual-PAN capability. This radio device, the MC13242, can be paired with any of the vast selection of Kinetis 32bit MCUs.

Dual-PAN functionality will be supported in Freescale's ZigBee protocol software and sample applications for the MC13242 and KW20 wireless MCUs, including the forthcoming ZigBee IP stack and ZigBee Smart Energy 2.0 standard.

Freescale is sampling the Kinetis KW20 wireless MCUs (KW21D256V, KW21D512V and KW22D512V) and the MC13242 RF transceiver to select customers, as well as providing ZigBee protocol stack and profile software. General availability is expected in 1Q13 and pricing for the KW21D256 starts at $4.27 suggested resale price for 10K units.





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