CC1021-RTR1 datasheet(61/91 Pages) TI1

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Not Recommended for New Designs NRND

CC1021

www.ti.com

SWRS045D – JANUARY 2006 – REVISED JANUARY 2015

Table 5-16. CC1021 Register Overview (continued)

ADDRESS

ACRONYM

25h

TEST5

Test register for ADC testing

26h

TEST6

Test register for VGA testing

27h

TEST7

Test register for VGA testing

Status information register

40h

STATUS

(PLL lock, RSSI, calibration ready, and so on)

41h

RESET_DONE

Status register for digital module reset

42h

RSSI

Received signal strength register

43h

AFC

Average received frequency deviation from IF (can be used for AFC)

44h

GAUSS_FILTER

Digital FM demodulator register

45h

STATUS1

Status of PLL calibration results and so on (test only)

46h

STATUS2

Status of PLL calibration results and so on (test only)

47h

STATUS3

Status of PLL calibration results and so on (test only)

48h

STATUS4

Status of ADC signals (test only)

49h

STATUS5

Status of channel filter “I” signal (test only)

4Ah

STATUS6

Status of channel filter “Q” signal (test only)

4Bh

STATUS7

Status of AGC (test only)

5.22.1 Memory

Table 5-17. MAIN Register (00h)

DEFAULT

NAME

ACTIVE

DESCRIPTION

VALUE

MAIN[7]

RXTX

—

RX/TX switch, 0: RX , 1: TX

MAIN[6]

F_REG

—

Selection of Frequency Register, 0: Register A, 1: Register B

MAIN[5:4]

PD_MODE[1:0]

—

Power down mode

0 (00): Receive Chain in power-down in TX, PA in power-down in

1 (01): Receive Chain and PA in power down in both TX and RX

2 (10): Individual modules can be put in power down by

programming the POWERDOWN register

3 (11): Automatic power-up sequencing is activated

(see Table 5-18)

MAIN[3]

FS_PD

—

Power Down of Frequency Synthesizer

MAIN[2]

XOSC_PD

—

Power Down of Crystal Oscillator Core

MAIN[1]

BIAS_PD

—

Power Down of BIAS (Global Current Generator) and Crystal Oscillator

Buffer

MAIN[0]

RESET_N

—

Reset, active low. Writing RESET_N low will write default values to all

other registers than MAIN. Bits in MAIN do not have a default value

and will be written directly through the configuration interface. Must be

set high to complete reset.

Table 5-18. MAIN Register (00h) When Using Automatic Power-up Sequencing

(RXTX = 0, PD_MODE[1:0] =11)

DEFAULT

NAME

ACTIVE

DESCRIPTION

VALUE

MAIN[7]

RXTX

—

Automatic power-up sequencing only works in RX (RXTX=0)

MAIN[6]

F_REG

—

Selection of Frequency Register, 0: Register A, 1: Register B

MAIN[5:4]

PD_MODE[1:0]

—

Set PD_MODE[1:0]=3 (11) to enable sequencing

Detailed Description

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