RFM31 Datasheet, PDF (98/137 Pages) –

RFM31
Register 39h. Synchronization Word 0
Bit
D7
D6
D5
D4
D3
D2
D1
D0
Name
sync[7:0]
Type
R/W
Reset value = 00000000
Bit
7：0
Name
sync[7:0]
Function
Synchronization Word 0.
1^st byte of the synchronization word.
Register 3Eh. Packet Length
Bit
D7
D6
D5
D4
D3
D2
D1
D0
Name
pklen[7:0]
Type
R/W
Reset value = 00000000
Bit
Name
7：0
pklen[7:0]
Function
Packet Length.
The value in the pklen[7:0] register corresponds directly to the number of bytes
in the Packet. For example pklen[7:0] = ‗00001000‘ corresponds to a packet
length of 8 bytes. The maximum packet length is pklen[7:0] = ‗11111111‘, a 255
byte packet. Writing 0 is possible, in this case we do not send any data in the
packet. During RX, if fixpklen = 1, this will specify also the Packet Length for RX
mode.
Check Header bytes 3 to 0 are checked against the corresponding bytes in the Received Header if the check is
enabled in "Register 31h. EZMAC® Status".
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