ADF7021

Preliminary Technical Data

Rev. PrI | Page 40 of 44

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

INTUPT/LOCK PIN MODE

0

INTUPT PIN LOW

1

INTUPT PIN HIGH AFTER NEXT SYNCWORD

2

INTUPT PIN HIGH AFTER NEXT SYNCWORD

FOR DATA_PACKET_LENGTH NUMBER OF BYTES

3

INTUPT PIN HIGH

Figure 44.

Register 12—SWD/Threshold Setup Register Notes

•

Lock threshold locks the threshold of the envelope detector. This has the effect of locking the slicer in linear demod and also locking

the AFC and AGC loops.