CC2510_15 Datasheet, PDF (214/245 Pages) Texas Instruments – Low-Power SoC (System-on-Chip) with MCU, Memory,2.4 GHz RF Transceiver, and USB Controller

CC2511F8 - Not Recommended for New Designs
CC2510Fx / CC2511Fx
0xDF11: DEVIATN - Modem Deviation Setting
Bit Field Name
Reset R/W Description
7
-
6: DEVIATION_E[2:0] 100
4
3
-
2: DEVIATION_M[2:0] 111
0
R0 Not used
R/W Deviation exponent
R0 Not used
R/W TX
2-FSK/
GFSK
Specifies the nominal frequency deviation from the carrier
frequency for a ‘0’ (-DEVIATN) and a ‘1’ (+DEVIATN) in a
mantissa-exponent format. The resulting deviation is given by:
f _dev
=
f _ref
2¹⁷
⋅ (8 + DEVIATION _ M ) ⋅ 2^{DEVIATION _ E}
MSK
The default values give ±47.607 kHz deviation when
fRef = 26 MHz and 43.945 kHz when fRef = 24 MHz.
Specifies the fraction of a symbol period (1/8-8/8) during which a
phase change occurs (‘0’: +90deg, ‘1’: -90deg). Refer to the
SmartRF^ Studio software [8] for correct DEVIATN setting when
using MSK.
RX
2-FSK/
GFSK
Specifies the expected frequency deviation of incoming signal,
must be approximately right for demodulation to be performed
reliably and robustly
MSK
This settings has no effect
0xDF12: MCSM2 - Main Radio Control State Machine Configuration
Bit Field Name
Reset R/W Description
7:5
-
R0 Not used
4 RX_TIME_RSSI
0
R/W Direct RX termination based on RSSI measurement (carrier sense).
3 RX_TIME_QUAL
0
R/W When the RX_TIME timer expires the chip stays in RX mode if sync word is
found when RX_TIME_QUAL=0, or either sync word is found or PQT is
reached when RX_TIME_QUAL=1.
2:0 RX_TIME[2:0]
111
R/W Timeout for sync word search in RX. The timeout is relative to the
programmed tEvent0.
The RX timeout in µs is given by EVENT0·C(RX_TIME, WOR_RES) 26/X, where C is given by the table below and X is
the reference frequency (fRef) in MHz:
RX_TIME[2:0] WOR_RES=0
WOR_RES=1
WOR_RES=2
WOR_RES=3
000
3.6058
18.0288
32.4519
46.8750
001
1.8029
9.0144
16.2260
23.4375
010
0.9014
4.5072
8.1130
11.7188
011
0.4507
2.2536
4.0565
5.8594
100
0.2254
1.1268
2.0282
2.9297
101
0.1127
0.5634
1.0141
1.4648
110
0.0563
0.2817
0.5071
0.7324
111
Until end of packet
As an example, EVENT0 = 34666, WOR_RES = 0 and RX_TIME = 6 corresponds to 1.96 ms RX timeout
SWRS055G
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