DS90UH949-Q1: Unused GPIO0-8

Nao

Part Number: DS90UH949-Q1

Hi, E2E members,

If we don't use some of GPIO pins, how should these pins be?

Pins Operating mode
GPIO0 TRI-STATE
GPIO1 TRI-STATE
GPIO2 Input
GPIO3 Input
GPIO5 Input
GPIO6 Input
GPIO7 nput
GPIO8 Input

Regards,
Nao

over 6 years ago

0 Charley Cai over 6 years ago

TI__Genius 12866 points

Please tie them to GND.

Best Regards,
Charley Cai

0 Nao over 6 years ago in reply to Charley Cai

Genius 4905 points

Hi, Charley

Thank you for you quick feedback.
Does GPIO pins have internal pull-down?

Regards,
Nao

0 Charley Cai over 6 years ago in reply to Nao

TI__Genius 12866 points

Yes, when they are set as input they have active pull down with about 0.5uA strength. However, we still recommended tie to GND if you know for sure GPIO are not used.

Best Regards,
Charley Cai

0 Nao over 6 years ago in reply to Charley Cai

Genius 4905 points

Hi, Charley

Thank you for your reply.
Do they have active pull down, when we are set as TRI-STATE mode?

Regards,
Nao

0 Nao over 6 years ago in reply to Nao

Genius 4905 points

Hi, Charley

Do you have any update?

Regards,
Nao

0 Charley Cai over 6 years ago in reply to Nao

TI__Genius 12866 points

Yes, they have the same active pull down in tri-state.

Best Regards,
Charley Cai

0 Nao over 6 years ago in reply to Charley Cai

Genius 4905 points

Hi, Charley

Thank you for your feedback.

Regards,
Nao

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DS90UH949-Q1: Unused GPIO0-8