CC1110-RTY1 datasheet(187/203 Pages) TI

187 / 203 page

CC1110

CC1110 PRELIMINARY Datasheet (Rev. 1.01) SWRS033A

Page 187 of 202

0xDF1B: FREND0 – Front end TX configuration

Bit

Field Name

Reset

R/W

Description

7:6

Reserved

5:4

LODIV_BUF_CURRENT_TX[1:0]

R/W

Adjusts current TX LO buffer (input to PA). The value to

use in this field is given by the SmartRF® Studio

software.

Reserved

2:0

PA_POWER[2:0]

000

R/W

Selects PA power setting. This value is an index to the

PATABLE, 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]

2 (10)

R/W

Frequency synthesizer calibration configuration. The value to write

in this register before calibration is given by the SmartRF® Studio

software.

5:4

CHP_CURR_CAL_EN[1:0]

2 (10)

R/W

Disable charge pump calibration stage when 0

3:0

FSCAL3[3:0]

(1001)

R/W

Frequency synthesizer calibration result register.

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.

0xDF1D: FSCAL2 – Frequency synthesizer calibration

Bit

Field Name

Reset

R/W

Description

7:6

Reserved

5:0

FSCAL2[5:0]

0x0A

R/W

Frequency synthesizer calibration result register.

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.

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