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SX1231
WIRELESS & SENSING PRODUCTS
DATASHEET
RegFifoThresh
(0x3C)
7
TxStartCondition
rw
1
*
Defines the condition to start packet transmission :
0 ? FifoLevel (i.e. the number of bytes in the FIFO
exceeds FifoThreshold)
1 ? FifoNotEmpty (i.e. at least one byte in the FIFO)
6-0
FifoThreshold
rw
0001111 Used to trigger FifoLevel interrupt.
RegPacketConfig2
(0x3D)
7-4
InterPacketRxDelay
rw
0000
After PayloadReady occurred, defines the delay between
FIFO empty and the start of a new RSSI phase for next
packet. Must match the transmitter ’s PA ramp-down time.
- Tdelay = 0 if InterpacketRxDelay >= 12
- Tdelay = (2 InterpacketRxDelay ) / BitRate otherwise
3
2
-
RestartRx
rw
w
0
0
unused
Forces the Receiver in WAIT mode, in Continuous Rx
mode.
Always reads 0.
1
AutoRxRestartOn
rw
1
Enables automatic Rx restart (RSSI phase) after
PayloadReady occurred and packet has been completely
read from FIFO:
0 ? Off. RestartRx can be used.
1 ? On. Rx automatically restarted after
InterPacketRxDelay .
0
AesOn
rw
0
Enable the AES encryption/decryption:
0 ? Off
1 ? On (payload limited to 66 bytes maximum)
RegAesKey1
7-0
AesKey(127:120)
w
0x00
1 st byte of cipher key (MSB byte)
(0x3E)
RegAesKey2
7-0
AesKey(119:112)
w
0x00
2 nd byte of cipher key
(0x3F)
RegAesKey3
7-0
AesKey(111:104)
w
0x00
3 rd byte of cipher key
(0x40)
RegAesKey4
7-0
AesKey(103:96)
w
0x00
4 th byte of cipher key
(0x41)
RegAesKey5
7-0
AesKey(95:88)
w
0x00
5 th byte of cipher key
(0x42)
RegAesKey6
7-0
AesKey(87:80)
w
0x00
6 th byte of cipher key
(0x43)
RegAesKey7
7-0
AesKey(79:72)
w
0x00
7 th byte of cipher key
(0x44)
RegAesKey8
7-0
AesKey(71:64)
w
0x00
8 th byte of cipher key
(0x45)
RegAesKey9
7-0
AesKey(63:56)
w
0x00
9 th byte of cipher key
(0x46)
RegAesKey10
7-0
AesKey(55:48)
w
0x00
10 th byte of cipher key
(0x47)
RegAesKey11
7-0
AesKey(47:40)
w
0x00
11 th byte of cipher key
(0x48)
RegAesKey12
7-0
AesKey(39:32)
w
0x00
12 th byte of cipher key
(0x49)
RegAesKey13
7-0
AesKey(31:24)
w
0x00
13 th byte of cipher key
(0x4A)
Rev. 7 - June 2013
Page 75
www.semtech.com
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