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CC2500 Datasheet, PDF (59/76 Pages) Texas Instruments – Single Chip Low Cost Low Power RF Transceiver | |||
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CC2500
Bit Field Name
7:6 CHANBW_E[1:0]
5:4 CHANBW_M[1:0]
3:0 DRATE_E[3:0]
0x10: MDMCFG4 â Modem configuration
Reset
R/W Description
2 (10)
0 (00)
12 (1100)
R/W
R/W Sets the decimation ratio for the delta-sigma ADC input stream
and thus the channel bandwidth.
BWchannel
=
f XOSC
8 â
(4 + CHANBW _ M )·2CHANBW _ E
The default values give 203 kHz channel filter bandwidth,
assuming a 26.0 MHz crystal.
R/W The exponent of the user specified symbol rate
Bit Field Name
7:0 DRATE_M[7:0]
0x11: MDMCFG3 â Modem configuration
Reset
R/W Description
34 (0x22)
R/W The mantissa of the user specified symbol rate. The symbol
rate is configured using an unsigned, floating-point number
with 9-bit mantissa and 4-bit exponent. The 9th bit is a hidden
â1â. The resulting data rate is:
( ) RDATA =
256 + DRATE _ M
228
â
2DRATE _ E â
f XOSC
The default values give a data rate of 115.051 kbps (closest
setting to 115.2 kbps), assuming a 26.0 MHz crystal.
Preliminary Data Sheet (rev.1.1.) SWRS040
Page 59 of 77
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