SX1231 SEMTECH [Semtech Corporation], SX1231 Datasheet - Page 71

• Manufacturer Part Number: SX1231
• Description: Low Power Integrated UHF Transceiver
• Manufacturer: SEMTECH [Semtech Corporation]

Rev 2 - Nov 2009
RegFifoThresh
(0x3C)
RegPacketConfig2
(0x3D)
RegAesKey1
(0x3E)
RegAesKey2
(0x3F)
RegAesKey3
(0x40)
RegAesKey4
(0x41)
RegAesKey5
(0x42)
RegAesKey6
(0x43)
RegAesKey7
(0x44)
RegAesKey8
(0x45)
RegAesKey9
(0x46)
RegAesKey10
(0x47)
RegAesKey11
(0x48)
RegAesKey12
(0x49)
RegAesKey13
(0x4A)
RegAesKey14
(0x4B)
ADVANCED COMMUNICATIONS & SENSING
6-0 FifoThreshold
7-4 InterPacketRxDelay
7-0 AesKey(127:120)
7-0 AesKey(119:112)
7-0 AesKey(111:104)
7-0 AesKey(103:96)
7-0 AesKey(95:88)
7-0 AesKey(87:80)
7-0 AesKey(79:72)
7-0 AesKey(71:64)
7-0 AesKey(63:56)
7-0 AesKey(55:48)
7-0 AesKey(47:40)
7-0 AesKey(39:32)
7-0 AesKey(31:24)
7-0 AesKey(23:16)
7
3
2
1
0
TxStartCondition
-
RestartRx
AutoRxRestartOn
AesOn
rw
rw
rw
rw
rw
rw
w
w
w
w
w
w
w
w
w
w
w
w
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w
w
Page 71
0001111 Used to trigger FifoLevel interrupt.
0000
0x00
0x00
0x00
0x00
0x00
0x00
0x00
0x00
0x00
0x00
0x00
0x00
0x00
0x00
1
0
0
1
0
*
Defines the condition to start packet transmission :
0
exceeds FifoThreshold)
1
unused
Forces a new RSSI phase to start a new packet reception.
Always reads 0.
Enables automatic Rx restart (RSSI phase) after
PayloadReady occurred and packet has been completely
read from FIFO:
0
1
InterPacketRxDelay .
Enable the AES encryption/decryption:
0
1
1
2
3
4
5
6
7
8
9
10
11
12
13
14
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
st
nd
rd
th
th
th
th
th
th
- Tdelay = (2
th
th
th
th
th
byte of cipher key (MSB byte)
byte of cipher key
byte of cipher key
byte of cipher key
byte of cipher key
byte of cipher key
byte of cipher key
byte of cipher key
byte of cipher key
byte of cipher key
byte of cipher key
byte of cipher key
byte of cipher key
byte of cipher key
FifoLevel (i.e. the number of bytes in the FIFO
FifoNotEmpty (i.e. at least one byte in the FIFO)
Off. RestartRx can be used.
On. Rx automatically restarted after
Off
On (payload limited to 66 bytes maximum)
InterpacketRxDelay
) / BitRate otherwise
DATASHEET
www.semtech.com
SX1231