CC1110Fx / CC1111Fx
0xDF0E: MDMCFG2 – Modem Configuration
Bit Field Name
Reset
R/W
Description
7
DEM_DCFILT_OFF
0
R/W
Disable digital DC blocking filter before demodulator. The recommended IF
frequency changes when the DC blocking is disabled. Please use SmartRF®
Studio [9] to calculate correct register setting.
0
1
Enable
Disable
Better Sensitivity
Current optimized. Only for data rates ≤ 250 kBaud
6:4 MOD_FORMAT[2:0] 000
R/W
The modulation format of the radio signal
000
001
010
011
100
101
110
111
2-FSK
GFSK
Reserved
Reserved
Reserved
Reserved
Reserved
MSK
3
MANCHESTER_EN
0
R/W
R/W
Manchester encoding/decoding enable
0
1
Disable
Enable
2:0 SYNC_MODE[2:0]
010
Sync-word qualifier mode.
The values 000 and 100 disables preamble and sync word transmission in
TX and preamble and sync word detection in RX.
The values 001, 010, 101 and 110 enables 16-bit sync word transmission in
TX and 16-bits sync word detection in RX. Only 15 of 16 bits need to match
in RX when using setting 001 or 101. The values 011 and 111 enables
repeated sync word transmission in TX and 32-bits sync word detection in
RX (only 30 of 32 bits need to match).
000
001
010
011
100
101
110
111
No preamble/sync
15/16 sync word bits detected
16/16 sync word bits detected
30/32 sync word bits detected
No preamble/sync, carrier-sense above threshold
15/16 + carrier-sense above threshold
16/16 + carrier-sense above threshold
30/32 + carrier-sense above threshold
SWRS033E
Page 213 of 239
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