Didisable TCXO on B-L072Z-LRWAN1 Discovery kit

[GErma.1]

Hi

There is any advantage in disabling the internal TCXO of the Lora Module by controlling the Pa12 pin?

BR

Gilberto

[Tesla DeLorean]

Uses less power, turns the radio off (in as much as the SX1276 no longer gets clocked)

[GErma.1]

Thanks

I have another question on a similar subject:

It is possible to provide a more accurate time base by connecting TCXO_OUT to PHO_OSC_IN according to the manual.

Can we switch the STM32L0 clock source dynamically between the internal oscillator and PHO_OSC_IN? If so I can use the internal oscillator during sleep mode and then switch to the external input for greater precision.

BR

Gilberto

[Tesla DeLorean]

Precision in doing what?

The radio uses the TCXO to get tight on band, and reduce the error budget. The MCU doesn't need to be clocked by the TCXO as generally the USART or I2C, for example are not that sensitive to slight clock error, whereas CAN or USB would be.