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SX1231
WIRELESS & SENSING PRODUCTS
DATASHEET
RegAesKey14
7-0
AesKey(23:16)
w
0x00
14 th byte of cipher key
(0x4B)
RegAesKey15
7-0
AesKey(15:8)
w
0x00
15 th byte of cipher key
(0x4C)
RegAesKey16
7-0
AesKey(7:0)
w
0x00
16 th byte of cipher key (LSB byte)
(0x4D)
6.7. Temperature Sensor Registers
Table 28 Temperature Sensor Registers
Name
(Address)
Bits Variable Name
Mode
Default
Value
Description
RegTemp1
(0x4E)
7-4
3
-
TempMeasStart
r
w
0000
0
unused
Triggers the temperature measurement when set. Always
reads 0.
2
TempMeasRunning
r
0
Set to 1 while the temperature measurement is running.
Toggles back to 0 when the measurement has completed.
The receiver can not be used while measuring
temperature
1-0
-
r
01
unused
RegTemp2
(0x4F)
7-0
TempValue
r
-
Measured temperature
-1°C per Lsb
Needs calibration for accuracy
6.8. Test Registers
Table 29 Test Registers
Name
(Address)
Bits Variable Name
Mode
Default
Value
Description
RegTestLna
7-0
SensitivityBoost
rw
0x1B
High sensitivity or normal sensitivity mode:
(0x58)
0x1B ? Normal mode
0x2D ? High sensitivity mode
RegTestTcxo
(0x59)
7-5
4
reserved
TcxoInputOn
rw
rw
0x00
0x00
reserved
Controls the crystal oscillator
0 ? Crystal Oscillator with external Crystal
1 ? External clipped sine TCXO ac coupled to XTA pin
3-0
reserved
rw
0x09
reserved
RegTestPIIBW
3-2
PIIBW
rw
0x02
PLL 3dB BW setting
(0x5F)
0x00 ? 75kHz
0x01 ? 150kHz
0x10 ? 300kHz
0x11 ? 600kHz
RegTestDagc
7-0
ContinuousDagc
rw
0x30
Fading Margin Improvement, refer to 3.5.4
(0x6F)
*
0x00 ? Normal mode
0x20 ? Improved margin, use if AfcLowBetaOn=1
0x30 ? Improved margin, use if AfcLowBetaOn=0
RegTestAfc
7-0
LowBetaAfcOffset
rw
0x00
AFC offset set for low modulation index systems, used if
(0x71)
AfcLowBetaOn=1 .
Offset = LowBetaAfcOffset x 488 Hz
Rev. 7 - June 2013
Page 76
www.semtech.com
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