Specifications

CC1101
SWRS061I Page 90 of 98
0x24: FSCAL2 – Frequency Synthesizer Calibration
Bit
Field Name
Reset
R/W
Description
7:6
R0
Not used
5
VCO_CORE_H_EN
0
R/W
Choose high (1) / low (0) VCO
4:0
FSCAL2[4:0]
10 (0x0A)
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,
FSCAL2 and FSCAL1 register values. Between each frequency hop,
calibration can be replaced by writing the FSCAL3, FSCAL2 and FSCAL1
register values corresponding to the next RF frequency.
0x25: FSCAL1 – Frequency Synthesizer Calibration
Bit
Field Name
Reset
R/W
Description
7:6
R0
Not used
5:0
FSCAL1[5:0]
32 (0x20)
R/W
Frequency synthesizer calibration result register. Capacitor array setting for
VCO coarse tuning.
Fast frequency hopping without calibration for each hop can be done by
calibrating upfront for each frequency and saving the resulting FSCAL3,
FSCAL2 and FSCAL1 register values. Between each frequency hop,
calibration can be replaced by writing the FSCAL3, FSCAL2 and FSCAL1
register values corresponding to the next RF frequency.
0x26: FSCAL0 – Frequency Synthesizer Calibration
Bit
Field Name
Reset
R/W
Description
7
R0
Not used
6:0
FSCAL0[6:0]
13 (0x0D)
R/W
Frequency synthesizer calibration control. The value to use in this register is
given by the SmartRF Studio software [5].
0x27: RCCTRL1 – RC Oscillator Configuration
Bit
Field Name
Reset
R/W
Description
7
0
R0
Not used
6:0
RCCTRL1[6:0]
65 (0x41)
R/W
RC oscillator configuration.
0x28: RCCTRL0 – RC Oscillator Configuration
Bit
Field Name
Reset
R/W
Description
7
0
R0
Not used
6:0
RCCTRL0[6:0]
0 (0x00)
R/W
RC oscillator configuration.