CC1150-RTR1 datasheet(53/67 Pages) TI

53 / 67 page

CC1150

SWRS037A

Page 53 of 60

0x23: FSCAL3 – Frequency synthesizer calibration

Bit

Field Name

Reset

R/W

Description

7:6

FSCAL3[7:6]

2 (0x02)

R/W

Frequency synthesizer calibration configuration. The value

to write in this field before calibration is given by the

SmartRF

® Studio software.

5:4

CHP_CURR_CAL_EN[1:0]

2 (0x02)

R/W

Disable charge pump calibration stage when 0.

3:0

FSCAL3[3:0]

9 (0x09)

R/W

Frequency synthesizer calibration result register. Digital bit

vector defining the charge pump output current, on an

exponential scale: I_OUT = 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, FSCAL2 and FSCAL1 register

values. Between each frequency hop, calibration can be

replaced by writing the FSCAL3, FSCAL2 and FSCAL1

0x24: FSCAL2 – Frequency synthesizer calibration

Bit

Field Name

Reset

R/W

Description

7:6

Not Used.

VCO_CORE_H_EN

R/W

Choose high (1)/ low (0) VCO.

5:0

FSCAL2[5:0]

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

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

Reserved

Not Used.

6:0

FSCAL0[6:0]

13 (0x0D)

R/W

Frequency synthesizer calibration control. The value to use in

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