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ISM330DHCX SDO_Aux wiring

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NBesn.1
Associate

‎2021-05-04 12:26 AM

Hello,

I have a question about the configuration of the SDO_Aux pin. The datasheet of the ISM330DHCX suggests to leave the pin unconnected or connected to VDD_IO . Which is the most stable configuration?

Thanks !

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niccolò
ST Employee

‎2021-05-04 01:42 AM

Hi @NBesn.1​ ,

for the SDO_Aux pin, both configuration are stable enough to get you all the characteristics described in the datasheet.

the bit OIS_ PU_DIS in register PIN_CTRL (02h) is used to set internal circuitry in a way to be able to use both modes with the same behaviour.

for what it's worth, I would suggest to tie it to Vdd_IO so you don't need to change the OIS_ PU_DIS value (it's default state considers the line with a pull-up)

hope this helps

Niccolò

p.s. if this answered to your question, you can select it as best answer to help other community members that can find it helpful in the future =)

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niccolò
ST Employee

‎2021-05-04 01:42 AM

Hi @NBesn.1​ ,

for the SDO_Aux pin, both configuration are stable enough to get you all the characteristics described in the datasheet.

the bit OIS_ PU_DIS in register PIN_CTRL (02h) is used to set internal circuitry in a way to be able to use both modes with the same behaviour.

for what it's worth, I would suggest to tie it to Vdd_IO so you don't need to change the OIS_ PU_DIS value (it's default state considers the line with a pull-up)

hope this helps

Niccolò

p.s. if this answered to your question, you can select it as best answer to help other community members that can find it helpful in the future =)

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