Register 11-Sync Word Detect Register; Register 12-Swd/Threshold Setup Register - Analog Devices ADF7021-V Manual

ADF7021-V
REGISTER 11—SYNC WORD DETECT REGISTER
REGISTER 12—SWD/THRESHOLD SETUP REGISTER
Lock threshold locks the threshold of the envelope detector.
This has the effect of locking the slicer in linear demodulation
SYNC_BYTE_SEQUENCE
Figure 73. Register 11—Sync Word Detect Register Map
DATA_PACKET_LENGTH
DPx DATA_PACKET_LENGTH
0 INVALID
1 1 BYTE
... ...
255 255 BYTES
ILx SWD_MODE
0 SWD PIN LOW
1 SWD PIN HIGH AFTER NEXT SYNC WORD
2 SWD PIN HIGH AFTER NEXT SYNC WORD
FOR DATA PACKET LENGTH NUMBER OF BYTES
3 SWD PIN HIGH
LMx LOCK_THRESHOLD_MODE
0 THRESHOLD FREE RUNNING
1 LOCK THRESHOLD AFTER NEXT SYNC WORD
2 LOCK THRESHOLD AFTER NEXT SYNC WORD
FOR DATA PACKET LENGTH NUMBER OF BYTES
3 LOCK THRESHOLD
Figure 74. Register 12—SWD/Threshold Setup Register Map
Rev. 0 | Page 56 of 60
MT2 MT1
0 0
0 1
1 0
1 1
CONTROL
BITS
and locking the AFC and AGC loops when using linear or
correlator demodulation.
CONTROL
BITS
SYNC_BYTE_
PL2 PL1
LENGTH
0 0 12 BITS
0 1
16 BITS
1 0 20 BITS
1 1 24 BITS
MATCHING_
TOLERANCE
ACCEPT 0 ERRORS
ACCEPT 1 ERROR
ACCEPT 2 ERRORS
ACCEPT 3 ERRORS