CC1021 datasheet(2/92 Pages) TI

2 / 92 page

CC1021

SWRS045

Page 2 of 91

Table of Contents

Abbreviations.................................................................................................................4

Absolute Maximum Ratings .........................................................................................5

Operating Conditions....................................................................................................5

Electrical Specifications ...............................................................................................5

4.1.

RF Transmit Section.............................................................................................6

4.2.

RF Receive Section..............................................................................................8

4.3.

RSSI / Carrier Sense Section.............................................................................11

4.4.

IF Section............................................................................................................11

4.5.

Crystal Oscillator Section ...................................................................................12

4.6.

Frequency Synthesizer Section..........................................................................13

4.7.

Digital Inputs / Outputs .......................................................................................14

4.8.

Current Consumption .........................................................................................15

Pin Assignment ...........................................................................................................15

Circuit Description ......................................................................................................17

Application Circuit.......................................................................................................18

Configuration Overview ..............................................................................................21

8.1.

Configuration Software .......................................................................................21

Microcontroller Interface ............................................................................................22

9.1.

4-wire Serial Configuration Interface ..................................................................23

9.2.

Signal Interface...................................................................................................25

10.

Data Rate Programming .............................................................................................27

11.

Frequency Programming............................................................................................28

11.1.

Dithering..........................................................................................................29

12.

Receiver........................................................................................................................30

12.1.

IF Frequency...................................................................................................30

12.2.

Receiver Channel Filter Bandwidth ................................................................30

12.3.

Demodulator, Bit Synchronizer and Data Decision.........................................31

12.4.

Receiver Sensitivity versus Data Rate and Frequency Separation ................32

12.5.

RSSI................................................................................................................33

12.6.

Image Rejection Calibration............................................................................35

12.7.

Blocking and Selectivity ..................................................................................36

12.8.

Linear IF Chain and AGC Settings .................................................................38

12.9.

AGC Settling ...................................................................................................40

12.10.

Preamble Length and Sync Word...................................................................40

12.11.

Carrier Sense..................................................................................................41

12.12.

Automatic Power-up Sequencing ...................................................................41

12.13.

Automatic Frequency Control .........................................................................42

12.14.

Digital FM ........................................................................................................43

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