Freescale Freedom Development Board FRDM-CR20A User’s Guide, Rev. 0, 04/2015
4
Freescale Semiconductor, Inc.
MCR20A transceiver overview and description
The FRDM-CR20A development board consists of one board that contains the MCR20A device with a 32
MHz reference oscillator crystal, RF circuitry including an antenna, and supporting circuitry to be
mounted into the popular Freescale Freedom development board form factor. The board is not a standalone
product; it requires an external MCU to support applications development, via SPI connection.
3.2
Board features
3.2.1
FRDM-CR20A board
The FRDM-CR20A development board can be plugged-into the Freescale Freedom development platform
as a shield. It contains the MCR20AVHM device and all necessary I/O connections to connect with the
Freedom system.
Figure 1
shows the FRDM-CR20A development board.
Figure 1. FRDM-CR20A
The FRDM-CR20A development board includes the following features:
•
The Freescale ultra-low-power MCR20AVHM 802.15.4 transceiver
•
Full IEEE 802.15.4 compliant wireless node
•
Reference design area with small footprint, low cost RF node
— RF circuitry includes a Balun to convert the differential input/output pin of the MCR20 to
single-ended for on-board signal routing
— Low off-chip component count
— Programmable output power from –35 dBm to +8 dBm at the SMA connector, no trap
— Receiver sensitivity: –102 dBm, typical (@1% PER for 20 byte payload packet)
•
Integrated PCB inverted F-type antenna and footprint for SMA RF port
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