SX1231
ADVANCED COMMUNICATIONS & SENSING
DATASHEET
6.3. Transmitter Registers
Table 23 Transmitter Registers
Name
(Address)
Default
Value
Bits Variable Name
Mode
Description
7
6
5
Pa0On
Pa1On
Pa2On
rw
rw
rw
rw
1
0
0
Enables PA0, connected to RFIO and LNA
Enables PA1, on PA_BOOST pin
Enables PA2, on PA_BOOST pin
RegPaLevel
(0x11)
4-0 OutputPower
11111 Output power setting, with 1 dB steps
Pout = -18 + OutputPower [dBm] , with PA0
Pout = -14 + OutputPower [dBm] , with PA1 and PA2
7-4
-
r
0000 unused
RegPaRamp
(0x12)
3-0 PaRamp
rw
1001 Rise/Fall time of ramp up/down in FSK
0000 Æ 3.4 ms
0001 Æ 2 ms
0010 Æ 1 ms
0011 Æ 500 us
0100 Æ 250 us
0101 Æ 125 us
0110 Æ 100 us
0111 Æ 62 us
1000 Æ 50 us
1001 Æ 40 us
1010 Æ 31 us
1011 Æ 25 us
1100 Æ 20 us
1101 Æ 15 us
1110 Æ 12 us
1111 Æ 10 us
7-5
4
-
r
000
unused
RegOcp
(0x13)
OcpOn
rw
1
*
Enables overload current protection (OCP) for the PA:
0 Æ OCP disabled
1 Æ OCP enabled
3-0 OcpTrim
rw
1011 Trimming of OCP current:
Imax = 45 + 5 × OcpTrim(mA)
100 mA OCP by default
Rev 2 - Nov 2009
Page 63
www.semtech.com
SEMTECH [ SEMTECH CORPORATION ]
