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SX1231
WIRELESS & SENSING PRODUCTS
6.3. Transmitter Registers
Table 24 Transmitter Registers
DATASHEET
Name
(Address)
Bits Variable Name
Mode
Default
Value
Description
RegPaLevel
(0x11)
7
6
5
4-0
Pa0On *
Pa1On *
Pa2On *
OutputPower
rw
rw
rw
rw
1
0
0
11111
Enables PA0, connected to RFIO and LNA
Enables PA1, on PA_BOOST pin
Enables PA2, on PA_BOOST pin
Output power setting, with 1 dB steps
Pout = -18 + OutputPower [dBm] , with PA0 or PA1
Pout = -14 + OutputPower [dBm] , with PA1 and PA2
(limited to the 16 upper values of OutputPower )
RegPaRamp
(0x12)
7-4
3-0
-
PaRamp
r
rw
0000
1001
unused
Rise/Fall time of ramp up/down in FSK
0000 ? 3.4 ms
0001 ? 2 ms
0010 ? 1 ms
0011 ? 500 us
0100 ? 250 us
0101 ? 125 us
0110 ? 100 us
0111 ? 62 us
1000 ? 50 us
1001 ? 40 us
1010 ? 31 us
1011 ? 25 us
1100 ? 20 us
1101 ? 15 us
1110 ? 12 us
1111 ? 10 us
RegOcp
(0x13)
7-5
4
-
OcpOn
r
rw
000
1
unused
Enables overload current protection (OCP) for the PA:
0 ? OCP disabled
1 ? OCP enabled
3-0
OcpTrim
rw
1010
Trimming of OCP current:
Imax = 45 + 5 × OcpTrim ( mA )
95 mA OCP by default
Note
*Power Amplifier truth table is available in Table 10.
Rev. 7 - June 2013
Page 68
www.semtech.com
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