LR1121
User Manual Rev 1.1
UM.LR1121.W.APP Mar 2023
76 of 130
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8.5.3 SetGfskSyncWord
Command SetGfskSyncWord(...) configures the Syncword of the (G)FSK packet.
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).
• NodeAddr: Default 0x00
• BroadcastAddr: Default 0x00
If the address comparison fails then the packet reception is aborted and the adrsErr flag is set.
Table 8-16: SetGfskSyncWord Command
Byte 0 1 2 3 4 5 6 7 8 9
Data
from
Host
0x02 0x06
Syncword
(63:56)
Syncword
(55:48)
Syncword
(47:40)
Syncword
(39:32)
Syncword
(31:24)
Syncword
(23:16)
Syncword
(15:8)
Syncword
(7:0)
Data to
Host
Stat1 Stat2
IrqStatus
(31:24)
IrqStatus
(23:16)
IrqStatus
(15:8)
IrqStatus
(7:0)
0x00 0x00 0x00 0x00
Table 8-17: SetPacketAdrs Command
Byte 0 1 2 3
Data from Host 0x02 0x12 NodeAddr BroadcastAddr
Data to Host Stat1 Stat2 IrqStatus (31:24) IrqStatus (23:16)
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