Specifications

CC1101
SWRS061I Page 86 of 98
0x1C: AGCCTRL1 – AGC Control
Bit
Field Name
Reset
R/W
Description
7
R0
Not used
6
AGC_LNA_PRIORITY
1
R/W
Selects between two different strategies for LNA and LNA 2 gain
adjustment. When 1, the LNA gain is decreased first. When 0, the
LNA 2 gain is decreased to minimum before decreasing LNA gain.
5:4
CARRIER_SENSE_REL_THR[1:0]
0 (00)
R/W
Sets the relative change threshold for asserting carrier sense
Setting
Carrier sense relative threshold
0 (00)
Relative carrier sense threshold disabled
1 (01)
6 dB increase in RSSI value
2 (10)
10 dB increase in RSSI value
3 (11)
14 dB increase in RSSI value
3:0
CARRIER_SENSE_ABS_THR[3:0]
0
(0000)
R/W
Sets the absolute RSSI threshold for asserting carrier sense. The
2-complement signed threshold is programmed in steps of 1 dB
and is relative to the MAGN_TARGET setting.
Setting
Carrier sense absolute threshold
(Equal to channel filter amplitude when AGC
has not decreased gain)
-8 (1000)
Absolute carrier sense threshold disabled
-7 (1001)
7 dB below MAGN_TARGET setting
…
…
-1 (1111)
1 dB below MAGN_TARGET setting
0 (0000)
At MAGN_TARGET setting
1 (0001)
1 dB above MAGN_TARGET setting
…
…
7 (0111)
7 dB above MAGN_TARGET setting