Context-switching transceiver consolidates multiple wireless functions

The MC33696 transceiver from Freescale Semiconductor reduces component count in designs comprising more than one wireless subsystem, by switching between two different receiver configurations without loading the host CPU.

The MC33696’s automatic context-switching capability allows designers to consolidate receivers in many applications. Examples include vehicles featuring Remote Keyless Entry (RKE) as well as a wireless Tyre Pressure Monitoring System (TPMS), where automatic detection of an RKE or TPMS frame initiates context switching without requiring CPU involvement. The MC33696 achieves this through integration of an independent onchip data manager. Programming features also support fast switching between receiver mode and transmitter mode, which allows this multi-tasking to be achieved transparently to the end user.

Further features of the MC33696 include a programmable fractional Phase Locked Loop (PLL), a Received Signal Strength Indicator (RSSI) circuit and a periodic wake-up timer. Devices are available in a variety of packages and operating-temperature ratings.

 

FEATURES Serves ISM bands from 304MHz to 915MHz Operating voltage range: 2.1V-3.6V or 4.5V-5.5V OOK and FSK transmission and reception Programmable via SPI port 6kHz PLL frequency step

APPLICATIONS Automotive systems Heating and lighting management Security systems Sensing and data-logging Asset-monitoring systems

 

 

Freescale Semiconductor: MC33696