CC1110Fx / CC1111Fx
0xDF1B: FREND0 – Front End TX Configuration
Bit
Field Name
Reset
R/W
Description
7:6
5:4
-
R0
Not used
LODIV_BUF_CURRENT_TX[1:0] 01
R/W
Adjusts current TX LO buffer (input to PA). The value to
use in this field is given by the SmartRF® Studio software
[9].
3
-
000
R0
Not used
2:0
PA_POWER[2:0]
R/W
Selects PA power setting. This value is an index to the
PATABLE (PA_TABLE7-PA_TABLE0registers), which can
be programmed with up to 8 different PA settings. In ASK
mode, this selects the PATABLE index to use when
transmitting a ‘1’. PATABLE index zero is used in ASK
when transmitting a ‘0’. The PATABLE settings from index
‘0’ to the PA_POWER value are used for ASK TX shaping,
and for power ramp-up/ramp-down at the start/end of
transmission in all TX modulation formats.
0xDF1C: FSCAL3 – Frequency Synthesizer Calibration
Bit Field Name
Reset
R/W
Description
7:6 FSCAL3[7:6]
10
R/W
Frequency synthesizer calibration configuration. The value to
write in this register before calibration is given by the
SmartRF® Studio software [9].
5:4 CHP_CURR_CAL_EN[1:0]
3:0 FSCAL3[3:0]
10
R/W
R/W
Disable charge pump calibration stage when 0
1001
Frequency synthesizer calibration result register. Digital bit
vector defining the charge pump output current, on an
exponential scale: IOUT=I0·2FSCAL3[3:0]/4
Fast frequency hopping without calibration for each hop can
be done by calibrating upfront for each frequency and saving
the resulting FSCAL3, FSCAL2and FSCAL1register values.
Between each frequency hop, calibration can be replaced by
writing the FSCAL3, FSCAL2and FSCAL1register values
corresponding to the next RF frequency.
Note: This register will be in its reset state when returning to active mode from PM2 and PM3.
0xDF1D: FSCAL2 – Frequency Synthesizer Calibration
Bit Field Name
Reset
R/W
Description
7:6
-
R0
Not used
5
VCO_CORE_H_EN
0
R/W
Select VCO
0
1
Low
High
4:0 FSCAL2[4:0]
01010
R/W
Frequency synthesizer calibration result register. VCO
current calibration result and override value
Fast frequency hopping without calibration for each hop can
be done by calibrating upfront for each frequency and saving
the resulting FSCAL3, FSCAL2and FSCAL1register values.
Between each frequency hop, calibration can be replaced by
writing the FSCAL3, FSCAL2and FSCAL1register values
corresponding to the next RF frequency.
Note: This register will be in its reset state when returning to active mode from PM2 and PM3.
SWRS033E
Page 221 of 239
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