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ADF7021 Datasheet(PDF) 58 Page - Analog Devices

Part # ADF7021
Description  High Performance Narrow-Band Transceiver IC
PDF  64 Pages
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Manufacturer  AD [Analog Devices]
Direct Link  http://www.analog.com
Logo AD - Analog Devices

ADF7021 Datasheet(HTML) 58 Page - Analog Devices

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ADF7021
Data Sheet
Rev. B | Page 58 of 64
REGISTER 11—SYNC WORD DETECT REGISTER
PL2
0
0
1
1
PL1
0
1
0
1
SYNC BYTE
LENGTH
12 BITS
16 BITS
20 BITS
24 BITS
MT2
0
0
1
1
MT1
0
1
0
1
MATCHING
TOLERANCE
ACCEPT 0 ERRORS
ACCEPT 1 ERROR
ACCEPT 2 ERRORS
ACCEPT 3 ERRORS
SYNC_BYTE_SEQUENCE
CONTROL
BITS
Figure 73. Register 11—Sync Word Detect Register Map
REGISTER 12—SWD/THRESHOLD SETUP REGISTER
DATA_PACKET_LENGTH
CONTROL
BITS
LOCK THRESHOLD MODE
0
THRESHOLD FREE RUNNING
1
LOCK THRESHOLD AFTER NEXT SYNCWORD
2
LOCK THRESHOLD AFTER NEXT SYNCWORD
FOR DATA PACKET LENGTH NUMBER OF BYTES
3
LOCK THRESHOLD
DATA PACKET LENGTH
0
INVALID
1
1 BYTE
...
...
255
255 BYTES
SWD MODE
0
SWD PIN LOW
1
SWD PIN HIGH AFTER NEXT SYNCWORD
2
SWD PIN HIGH AFTER NEXT SYNCWORD
FOR DATA PACKET LENGTH NUMBER OF BYTES
3
INTERRUPT PIN HIGH
Figure 74. Register 12—SWD/Threshold Setup Register Map
Lock threshold locks the threshold of the envelope detector. This has the effect of locking the slicer in linear demodulation and locking
the AFC and AGC loops when using linear or correlator demodulation.



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