Freescale Freedom Development Board FRDM-CR20A User’s Guide, Rev. 0, 04/2015
Freescale Semiconductor, Inc.
9
FRDM-CR20A development board
4.2
Functional description
The FRDM-CR20A is built around the Freescale FRDM-CR20A transceiver with a 32-pin LGA package.
This board is intended as a simple evaluation platform and as a building block for application development.
The two-layer board provides the MCR20A transceiver with the required RF circuitry and 32 MHz
reference oscillator crystal. The layout for this base level functionality can be used as a reference layout
for the user’s target board.
Figure 5
shows a simple block diagram.
Figure 5. FRDM-CR20A block diagram
4.2.1
RF performance and considerations
The FRDM-CR20A development board includes the Freescale MCR20 2.4 GHz transceiver. Key
specifications for the FRDM-CR20A development board are:
•
Programmable output power from –35 dBm to +8 dBm at the SMA, no trap
•
Typical sensitivity is -102 dBm (@1% PER for 20 byte payload packet)
Environment
RoHS
Product complies with the EU Directive 2002/95/EC
of 27 January 2003
WEEE
Product complies with the EU Directive 2002/95/EC
of 27 January 2003
1
Trap will add 1 to 2 dB of loss.
Table 1. FRDM-CR20A board specifications (continued)
Parameter
Min
Typ
Max
Units
Notes/Conditions
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