CC2500-RTR1 datasheet(80/96 Pages) TI

80 / 96 page

CC2500

SWRS040C

Page 80 of 89

0x25: FSCAL1 – Frequency Synthesizer Calibration

Bit

Field Name

Reset

R/W

Description

7:6

Reserved

5:0

FSCAL1[5:0]

(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

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

Reserved

6:0

RCCTRL1[6:0]

(0x41)

R/W

RC oscillator configuration.

0x28: RCCTRL0 – RC Oscillator Configuration

Bit

Field Name

Reset

R/W

Description

Reserved

6:0

RCCTRL0[6:0]

(0x00)

R/W

RC oscillator configuration.

32.2

Configuration Register Details – Registers that Lose Programming in SLEEP State

0x29: FSTEST – Frequency Synthesizer Calibration Control

Bit

Field Name

Reset

R/W

Description

7:0

FSTEST[7:0]

(0x59)

R/W

For test only. Do not write to this register.

0x2A: PTEST – Production Test

Bit

Field Name

Reset

R/W

Description

7:0

PTEST[7:0]

127

(0x7F)

R/W

Writing 0xBF to this register makes the on-chip temperature sensor

available in the IDLE state. The default 0x7F value should then be

written back before leaving the IDLE state.

Other use of this register is for test only.

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