DS90UB960-Q1: Behavior of internal pull down circuit on GPIO pins

Kohsuke Hamasaki

Intellectual 1180 points

Part Number: DS90UB960-Q1

Hi, Team,

2 questions below,

Is the internal pulldown circuit activated in between "IC powered ON and GPIO settings"?
Isn't the internal pulldown circuit activated before IC powered ON?

Thanks,

Best regards,

Koh

over 4 years ago

0 Hamzeh Jaradat over 4 years ago

TI__Guru** 108350 points

Hello Koh,

before releasing PDB, GPIO pins are Tri-state.

0 Kohsuke Hamasaki over 4 years ago in reply to Hamzeh Jaradat

TI__Intellectual 1180 points

Hi, Hamzeh,

Thanks for the reply.

How is this question?

Is the internal pulldown circuit activated in between "IC powered ON and GPIO settings"?

The default is set as INPUT port for all GPIOs. This case those pins are pulled down once PDB released?

Then after change the register settings for OUTPUT enabled, how is operated an internal pull down circuit?

Best regards,

Koh

0 Hamzeh Jaradat over 4 years ago in reply to Kohsuke Hamasaki

TI__Guru** 108350 points

Hello Koh,

By default, the GPIO pin is enabled as input and the internal pulldown resistor in the GPIO is enabled. If you change the GPIO to output, the internall pulldown will be automatically disabled.

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DS90UB960-Q1: Behavior of internal pull down circuit on GPIO pins