How to connect 3-4SEL to SPI2_CLK on STWINKT1B Eval Board?

[DLim.16]

Hi,

I would like to have SPI2_CLK signal available on the CN2 connector (STMod+ interface) on the STWINKT1B eval board. Based on the schematic, looks like one can activate SPI2_CLK signal on STMOD4 via the 3-4SEL pin on the STG3692 digital switch. But I don't know how to do that and what to set up on the STM32CubeIDE side, can someone please help?

Thanks.

[Peter BENSCH · Accepted solution]

All you need to do is to set 3-4SEL of the STG3692 to 1 (high) to close the switch 3S1 to STMOD4.

3-4SEL is connected to pin B8 (PD1) of the STM32L4R9ZIJ6.

Just insert into your program something like

HAL_GPIO_WritePin(GPIOD, GPIO_PIN_1, GPIO_PIN_SET);

or similar, e.g. using your predefined pin name, to set the pin PD1 to 1.

Good luck!

Regards

/Peter

[DLim.16]

It turns out I have to set pin PF14 instead of PD1 because that's what 3-4SEL is actually connected to. It works now, thanks Peter!