SX1232IML View Datasheet(PDF) - Semtech Corporation

Part Name

Description

Manufacturer

SX1232IML

868 & 915MHz Ultra Low Power High Link Budget Integrated UHF Transceiver

Semtech Corporation 

SX1232

WIRELESS & SENSING

DATASHEET

3.5.8. Frequency Error Indicator......................................................................................................................... 33

3.5.9. AFC .......................................................................................................................................................... 34

3.5.10. Preamble Detector ..................................................................................................................................35

3.5.11. Image Rejection Mixer............................................................................................................................ 35

3.5.12. Image and RSSI Calibration ................................................................................................................... 35

3.6. Temperature Measurement........................................................................................................................... 36

3.7. Timeout Function .......................................................................................................................................... 37

4. Operating Modes .................................................................................................................................................. 38

4.1. General Overview ......................................................................................................................................... 38

4.2. Startup Times................................................................................................................................................ 38

4.2.1. Transmitter Startup Time........................................................................................................................... 39

4.2.2. Receiver Startup Time.............................................................................................................................. 39

4.2.3. Time to RSSI Evaluation .......................................................................................................................... 40

4.2.4. Tx to Rx Turnaround Time ....................................................................................................................... 40

4.2.5. Rx to Tx .................................................................................................................................................... 40

4.2.6. Receiver Hopping, Rx to Rx ...................................................................................................................... 41

4.2.7. Tx to Tx .................................................................................................................................................... 41

4.3. Receiver Startup Options .............................................................................................................................. 42

4.4. Receiver Restarting Methods........................................................................................................................ 42

4.4.1. Restart Upon User Request ..................................................................................................................... 42

4.4.2. Automatic Restart after valid Packet Reception ........................................................................................ 43

4.4.3. Automatic Restart when Packet Collision is Detected.............................................................................. 43

4.5. Top Level Sequencer .................................................................................................................................... 44

4.5.1. Sequencer States ..................................................................................................................................... 44

4.5.2. Sequencer Transitions ..............................................................................................................................45

4.5.3. Timers ...................................................................................................................................................... 46

4.5.4. Sequencer State Machine .........................................................................................................................47

5. Data Processing.................................................................................................................................................... 48

5.1. Overview ....................................................................................................................................................... 48

5.1.1. Block Diagram .......................................................................................................................................... 48

5.1.2. Data Operation Modes ............................................................................................................................. 48

5.2. Control Block Description.............................................................................................................................. 49

5.2.1. SPI Interface............................................................................................................................................. 49

5.2.2. FIFO ......................................................................................................................................................... 50

5.2.3. Sync Word Recognition ............................................................................................................................ 51

5.2.4. Packet Handler ......................................................................................................................................... 52

5.2.5. Control ...................................................................................................................................................... 52

5.3. Digital IO Pins Mapping................................................................................................................................. 53

5.4. Continuous Mode .......................................................................................................................................... 54

5.4.1. General Description.................................................................................................................................. 54

5.4.2. Tx Processing........................................................................................................................................... 54

5.4.3. Rx Processing .......................................................................................................................................... 55

Rev 3 - August 2012

Page 3

www.semtech.com

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