SX1232
WIRELESS & SENSING
DATASHEET
Name
(Address)
Default
value
Bits
Mode
Variable Name
Description
RegFrfMsb
(0x06)
7-0
7-0
7-0
Frf(23:16)
Frf(15:8)
Frf(7:0)
rw
0xe4 MSB of the RF carrier frequency
0xc0 MSB of the RF carrier frequency
RegFrfMid
(0x07)
rw
rw
RegFrfLsb
(0x08)
0x00 LSB of RF carrier frequency
Frf = Fstep × Frf(23;0)
Default value: 915.000 MHz
The RF frequency is taken into account internally only when:
- entering FSRX/FSTX modes
- re-starting the receiver
Registers for the Transmitter
RegPaConfig
(0x09)
7
PaSelect
rw
0x00 Selects PA output pin
0 Æ RFO pin. Maximum power of +13 dBm
1 Æ PA_BOOST pin. Maximum power of +20 dBm
6-4
3-0
unused
r
0x00 unused
OutputPower
rw
0x0f Output power setting, with 1dB steps
Pout = 2 + OutputPower [dBm] , on PA_BOOST pin
Pout = -1 + OutputPower [dBm] , on RFO pin
RegPaRamp
(0x0A)
7-5
4
unused
r
-
unused
LowPnTxPllOff
rw
0x01 Select a higher power, lower phase noise PLL only when the
transmitter is used:
0 Æ Standard PLL used in Rx mode, Lower PN PLL in Tx
1 Æ Standard PLL used in both Tx and Rx modes
3-0
PaRamp
rw
0x09 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 (d)
1010 Æ 31 us
1011 Æ 25 us
1100 Æ 20 us
1101 Æ 15 us
1110 Æ 12 us
1111 Æ 10 us
Rev 3 - August 2012
Page 68
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SEMTECH [ SEMTECH CORPORATION ]
