CC1010-RTY1 datasheet(108/150 Pages) TI2

108 / 150 page

CC1010

SWRS047A

Page 108 of 146

number between 2 and 24 that should be

chosen such that:

1.00 MHz

≤ f

ref ≤ 2.40 MHz

Thus, the reference frequency fref is:

REFDIV

xosc

ref =

fVCO is the Local Oscillator (LO) frequency

in receive mode, and the f0 frequency in

transmit mode (lower FSK frequency).

The LO frequency must be fRF – fIF or fRF +

fIF giving low-side or high side LO injection

respectively. Note that the data in RFBUF

will be inverted if high-side LO is used.

Please also note that fIF depends on the

RF frequency (150 and 130 kHz for 433

and 868 MHz respectively).

The upper FSK transmit frequency is given

by:

f1 = f0 + fsep ,

where the frequency separation fsep is set

the

bit

separation

word

(FSEP1:FSEP0):

16384

FSEP

ref

sep

⋅

Clearing

PLL.ALARM_DISABLE

will

enable generation of the frequency alarm

bits PLL.ALARM_H and PLL.ALARM_L.

These bits indicate that the frequency

synthesis PLL is unable to generate the

frequency requested, and the PLL should

be recalibrated as described in the VCO

and PLL self-calibration section on page

113.

recommended

that

the

LOCK_CONTINOUS

bit in the LOCK register

is checked when changing frequencies

and when changing between RX and TX

mode. If lock is not achieved, a calibration

should be performed as described on

page 113.

Chipcon recommends using the frequency

settings described in the Recommended

Settings for ISM Frequencies section on

page 111. Chipcon recommends the use

the

SmartRF

Studio

software

calculate RF settings for the CC1010.

Using the Print registers to file option in

the File menu generates a text file with a C

constant structure that can be passed to

the RF configuration routines in the HAL

library.

FREQ_2A (0xCC) – Frequency A, Control Register 2

Bit

Name

R/W

Reset value

Description

7:0

FREQ_A (23:16)

R/W

0x75

8 MSB of frequency control word A. It must be

programmed such that FREQ_2A

≥ 01000000

FREQ_1A (0xCB) – Frequency A, Control Register 1

Bit

Name

R/W

Reset value

Description

7:0

FREQ_A (15:8)

R/W

0xA0

Bit 15 to 8 of frequency control word A.

FREQ_0A (0xCA) – Frequency A, Control Register 0

Bit

Name

R/W

Reset value

Description

7:0

FREQ_A(7:0)

R/W

0xCB

8 LSB of frequency control word A.

FREQ_2B (0xCF) - Frequency B, Control Register 2

Bit

Name

R/W

Reset value

Description

7:0

FREQ_B (23:16)

R/W

0x75

8 MSB of frequency control word B. It must be

programmed such that FREQ_2B

≥ 01000000

FREQ_1B (0xCE) - Frequency B, Control Register 1

Bit

Name

R/W

Reset value

Description

7:0

FREQ_B (15:8)

R/W

0xA5

Bit 15 to 8 of frequency control word B.

CC1010-RTY1 Datasheet(PDF) 108 Page - Texas Instruments

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