Rf Switch Control; Setdioasrfswitch; Table 4-5: Setdioasrfswitch Command - Semtech LR1110 User Manual

4.2 RF Switch Control

4.2.1 SetDioAsRfSwitch

DIO5, DIO6, DIO7, DIO8 and DIO10 can be used to control external RF switches or LNAs on the Sub-GHz, GNSS, and Wi-Fi RF
paths using the SetDioAsRfSwitch( ) command:

Table 4-5: SetDioAsRfSwitch Command

Byte 0
Data from Host 0x01
Data to Host Stat1
•
RfswEnable value indicates which switch is used (1) and which is not (0). Only the lowest 5 bits of all the configurations
as well as the enable are taken into account. Each Cfg bit corresponds to the state of the RFSW output for that
particular mode:
Bit 0 - RFSW0 Enabled (DIO5 pin)

Bit 1 - RFSW1 Enabled (DIO6 pin)

Bit 2 - RFSW2 Enabled (DIO7 pin)

Bit 3 - RFSW3 Enabled (DIO8 pin)

Bit 4 - RFSW4 Enabled (DIO10 pin)

•
RfSwStbyCfg value indicates the RFSW DIO states when in standby mode.
•
RfSwRxCfg value tells the RFSW DIO states when in RX mode.
•
RfSwTxCfg value indicates the RFSW DIO states when in low power TX mode.
•
RfSwTxHPCfg value indicates the RFSW DIO states when in high power TX mode.
•
RfSwGnssCfg value indicates the RFSW DIO states when in GNSS scanning mode.
•
RfSwWifiCfg value indicates the RFSW DIO states when in Wi-Fi scanning mode.
•
Byte 7 is RFU
By default, no DIO is used as RF switch: all RFSW outputs are in High-Z state.
This command will only work with the chip in Standby RC mode, otherwise it will return a CMD_FAIL on the next GetStatus
command.
LR1110
User Manual Rev.1.0
UM.LR1110.W.APP March 2020
1 2 3
RfSw RfSw
0x12
Enable StbyCfg
IrqStatus IrqStatus
Stat2
(31:24) (23:16)
www.semtech.com
4 5 6
RfSw RfSw RfSw
RxCfg TxCfg TxHPCfg
IrqStatus IrqStatus
0x00
(15:8) (7:0)
7 8 9
RfSw RfSw
RFU
GnssCfg WifiCfg
0x00 0x00 0x00
33 of 130
Semtech