Data Sheet

LJ1269HC
Rev1.0 Page 64 Web: www.ljelect.com
6.3. Transmitter Registers
Table 25 Transmitter Registers
Name
(Address)
Bits
Variable
Name
Mode
Default
Value
Description
RegPaLevel
(0x11)
7
Pa0On *
rw
1
Enables PA0, connected to RFIO and LNA
Enables PA0, connected to RFIO and LNA
6
Pa1On *
rw
0
Enables PA1, on PA_BOOST pin
5
Pa2On *
rw
0
Enables PA2, on PA_BOOST pin
4-0
OutputPower
rw
11111
Output power setting, with 1 dB steps
Pout = -18 + OutputPower [dBm] , with PA0
Pout = -18 + OutputPower [dBm] , with PA1**
Pout = -14+ OutputPower [dBm] , with PA1 and PA2**
Pout = -11 + OutputPower [dBm] , with PA1 and PA2, and high
Power PA settings (refer to section 3.3.7)**
RegPaRamp
(0x12)
7-4
-
r
0000
unused
3-0
PaRamp
rw
1001
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
-
r
000
unused
4
OcpOn
rw
1
Enables overload current protection (OCP) for the PA:
0 → OCP disabled
1 → OCP enabled
3-0
OcpTrim
rw
1010
Trimming of OCP current:
Ima x = 45 + 5 ⋅ OcpTrim mA  95 mA OCP by default
Note *Power Amplifier truth table is available in Table 10
** Only the16 upper values of OutputPower are accessible
Sub GHz FSK/OOK Transceiver Module DATASHEET