CC1021 datasheet(3/94 Pages) TI

3 / 94 page

CC1021

SWRS045C

Page 3 of 87

13.

Transmitter .................................................................................................................. 44

13.1.

FSK Modulation Formats ............................................................................... 44

13.2.

Output Power Programming........................................................................... 44

13.3.

TX Data Latency............................................................................................. 45

13.4.

Reducing Spurious Emission and Modulation Bandwidth.............................. 46

14.

Input / Output Matching and Filtering....................................................................... 46

15.

Frequency Synthesizer .............................................................................................. 50

15.1.

VCO, Charge Pump and PLL Loop Filter....................................................... 50

15.2.

VCO and PLL Self-Calibration ....................................................................... 51

15.3.

PLL Turn-on Time versus Loop Filter Bandwidth........................................... 52

15.4.

PLL Lock Time versus Loop Filter Bandwidth................................................ 53

16.

VCO and LNA Current Control .................................................................................. 53

17.

Power Management .................................................................................................... 54

18.

On-Off Keying (OOK).................................................................................................. 56

19.

Crystal Oscillator ........................................................................................................ 58

20.

Built-in Test Pattern Generator ................................................................................. 59

21.

Interrupt on Pin DCLK ................................................................................................ 60

21.1.

Interrupt upon PLL Lock................................................................................. 60

21.2.

Interrupt upon Received Signal Carrier Sense .............................................. 60

22.

PA_EN and LNA_EN Digital Output Pins ................................................................. 60

22.1.

Interfacing an External LNA or PA ................................................................. 60

22.2.

General Purpose Output Control Pins............................................................ 61

22.3.

PA_EN and LNA_EN Pin Drive...................................................................... 61

23.

System Considerations and Guidelines................................................................... 61

24.

PCB Layout Recommendations ................................................................................ 63

25.

Antenna Considerations ............................................................................................ 64

26.

Configuration Registers............................................................................................. 64

26.1.

CC1021 Register Overview............................................................................ 65

27.

Package Marking ........................................................................................................ 85

28.

Soldering Information ................................................................................................ 85

29.

Plastic Tube Specification ......................................................................................... 85

30.

Ordering Information.................................................................................................. 86

31.

General Information.................................................................................................... 87

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