About "VREF+" pin

[tatsuya]

Hi team,

I am developing our PCB referring to the "STM32MP157 EVAL"(MB1263-C04 Board schematic).

https://www.st.com/en/evaluation-tools/stm32mp157f-ev1.html#cad-resources

In the datasheet, VREF+ looks like a voltage output pin, but why is power supply connected to VREF+ in STM32MP157 EVAL?

Best regard,

[Piranha]

Maybe read the text in the image you posted?

[QSHAO.1 · Accepted solution]

in datasheet, it's mentioned that "An external voltage reference can be provided through the VREF+ pin when the internal voltage reference buffer is off". so external Vref+ mode is used on the board.

[EZHON.1]

Don't forget to add a 1uF capacitor for decoupling when used as output.

[PatrickF]

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