Setgfsksyncword; Setpacketadrs; Table 8-16: Setgfsksyncword Command; Table 8-17: Setpacketadrs Command - Semtech LR1121 User Manual

8.5.3 SetGfskSyncWord

Command SetGfskSyncWord(...) configures the Syncword of the (G)FSK packet.

Table 8-16: SetGfskSyncWord Command

Byte 0 1
Data
from 0x02 0x06
Host
Data to
Stat1 Stat2
Host
By default, the Syncword is set to 0x9723522556536564.
For reception only, the GFSK Syncword must be a multiple of 8 bits. If it is not, the Syncword length must still be configured
as a multiple of 8 bits, and the Sync word must have filler added at the beginning. For example, if the syncword length was
30 bits, the syncword length should be configured to 32 bits, and "01b" or "10b" should be added to the beginning of the
Syncword.

8.5.4 SetPacketAdrs

Command SetPacketAdrs(...) sets the Node address and Broadcast address used for (G)FSK packet
reception/transmission when filtering is enabled (AddrComp 0x01, or 0x02).

Table 8-17: SetPacketAdrs Command

Byte
Data from Host
Data to Host
•
NodeAddr: Default 0x00
•
BroadcastAddr: Default 0x00
If the address comparison fails then the packet reception is aborted and the adrsErr flag is set.
LR1121
User Manual Rev 1.1
UM.LR1121.W.APP Mar 2023
2 3
Syncword Syncword Syncword
(63:56) (55:48) (47:40)
IrqStatus IrqStatus IrqStatus
(31:24) (23:16)
0
0x02
Stat1
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4 5
Syncword Syncword
(39:32) (31:24)
IrqStatus
0x00
(15:8) (7:0)
1
0x12
Stat2 IrqStatus (31:24)
6 7 8
Syncword Syncword
(23:16) (15:8)
0x00 0x00
2
NodeAddr BroadcastAddr
IrqStatus (23:16)
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9
Syncword
(7:0)
0x00
3
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