CC1021 datasheet(68/94 Pages) TI

68 / 94 page

CC1021

SWRS045C

Page 68 of 87

SEQUENCING Register (03h)

NAME

Default

value

Active

Description

SEQUENCING[7]

SEQ_PSEL

Use PSEL pin to start sequencing

0: PSEL pin does not start sequencing. Negative

transitions on DIO starts power-up sequencing if

SEP_DI_DO=1.

1: Negative transitions on the PSEL pin will start power-

up sequencing

SEQUENCING[6:4]

RX_WAIT[2:0]

Waiting time from PLL enters lock until RX power-up

0: Wait for approx. 32 ADC_CLK periods (26 µs)

1: Wait for approx. 44 ADC_CLK periods (36 µs)

2: Wait for approx. 64 ADC_CLK periods (52 µs)

3: Wait for approx. 88 ADC_CLK periods (72 µs)

4: Wait for approx. 128 ADC_CLK periods (104 µs)

5: Wait for approx. 176 ADC_CLK periods (143 µs)

6: Wait for approx. 256 ADC_CLK periods (208 µs)

7: No additional waiting time before RX power-up

SEQUENCING[3:0]

CS_WAIT[3:0]

Waiting time for carrier sense from RX power-up

0: Wait 20 FILTER_CLK periods before power down

1: Wait 22 FILTER_CLK periods before power down

2: Wait 24 FILTER_CLK periods before power down

3: Wait 26 FILTER_CLK periods before power down

4: Wait 28 FILTER_CLK periods before power down

5: Wait 30 FILTER_CLK periods before power down

6: Wait 32 FILTER_CLK periods before power down

7: Wait 36 FILTER_CLK periods before power down

8: Wait 40 FILTER_CLK periods before power down

9: Wait 44 FILTER_CLK periods before power down

10: Wait 48 FILTER_CLK periods before power down

11: Wait 52 FILTER_CLK periods before power down

12: Wait 56 FILTER_CLK periods before power down

13: Wait 60 FILTER_CLK periods before power down

14: Wait 64 FILTER_CLK periods before power down

15: Wait 72 FILTER_CLK periods before power down

FREQ_2A Register (04h)

NAME

Default

value

Active

Description

FREQ_2A[7:0]

FREQ_A[22:15]

131

8 MSB of frequency control word A

FREQ_1A Register (05h)

NAME

Default

value

Active

Description

FREQ_1A[7:0]

FREQ_A[14:7]

177

Bit 15 to 8 of frequency control word A

FREQ_0A Register (06h)

NAME

Default

value

Active

Description

FREQ_0A[7:1]

FREQ_A[6:0]

124

7 LSB of frequency control word A

FREQ_0A[0]

DITHER_A

Enable dithering for frequency A

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