Semtech LR1110 - Table 6-2: Settcxomode Command; Table 6-3: TCXO Supply Voltage Programming Values

LR1110
User Manual Rev.1.0
UM.LR1110.W.APP March 2020
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Semtech
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6.2.3.2 SetTcxoMode
The SetTcxoMode( ) command configures the chip for a connected TCXO.
• RegTcxoTune allows to tune the output voltage on the TCXO supply pin VTCXO, according to Table 6-3: TCXO Supply
Voltage programming values
• Delay represents the maximum duration for the 32MHz oscillator to start and stabilize (in 30.52us steps). If the 32 MHz
oscillator from the TCXO is not detected internally at the end the delay period, the device internal firmware triggers a
HF_XOSC_START_ERR error.
 Delay set to 0 (default value) disables the TCXO mode.
The command will operate only in Standby RC mode, otherwise it will return CMD_FAIL on the next GetStatus command.
Table 6-2: SetTcxoMode Command
Byte 0 1 2 3 4 5
Data from Host 0x01 0x17 RegTcxoTune
Delay
(23:16)
Delay
(15:8)
Delay
(7:0)
Data to Host Stat1 Stat2
IrqStatus
(31:24)
IrqStatus
(23:16)
IrqStatus
(15:8)
IrqStatus
(7:0)
Table 6-3: TCXO Supply Voltage programming values
RegTcxoTune TCXO Supply Voltage (typ)
0x00 1.6
0x01 1.8
0x02 1.8 V
0x03 2.2 V
0x04 2.4 V
0x05 2.7 V
0x06 3.0 V
0x07 3.3 V