RF65 Datasheet, PDF (46/72 Pages) List of Unclassifed Manufacturers – Low Power Integrated UHF Receiver With -120dBm High Sensitivity

ADVANCED COMMUNICATIONS & SENSING
RF65
DATASHEET
 Optional Address byte (Node ID)
 Message data
 Optional 2-bytes CRC checksum
Preamble
0 to 65535
bytes
Sync W ord
0 to 8 bytes
Length
byte
DC free Data decoding
CRC checksum calculation
AES Decryption
Address
byte
Message
Up to 255 bytes
CRC
2-bytes
Fields processed and removed in Rx
Payload
(min 2 bytes)
Optional User provided fields which are part of the payload
Message part of the payload
Figure 29. Variable Length Packet Format
5.5.2.3. Unlimited Length Packet Format
Unlimited length packet format is selected when bit PacketFormat is set to 0 and PayloadLength is set to 0.
The user can then receive packets of arbitrary length and PayloadLength register is not used in Rx modes for counting the
length of the bytes received. This mode is a replacement for the legacy buffered mode in RF63/RF64 transceivers.
The data processing features like Address filtering, Manchester decoding and data dewhitening are not available if the
sync pattern length is set to zero (SyncOn = 0). The CRC detection is also not supported in this mode of the packet
handler. The interrupts like CrcOk & PayloadReady are not available either.
An unlimited length packet shown in is made up of the following fields:
DC free Data decoding
Preamble
0 to 65535
bytes
Sync Word
0 to 8 bytes
Address
byte
Message
unlimited length
Payload
Fields processed and removed in Rx
Message part of the payload
Optional User provided fields which are part of the payload
Figure 30. Unlimited Length Packet Format
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