Forum Post: RE: tms320c6748 - are gpio pulls disabled automatically when config as output

Hi Perry,

The internal Pull-up/Pull-down functionality can be set through SYSCFG1 registers

1. PUPD_ENA Pull-up/Pull-down Enable Register
2. PUPD_SEL Pull-up/Pull-down Selection Register

You need to specify the pin group CP [0...31] in which you’re going to use the Pull-up/Pull-down functionality

GPIO peripheral provides dedicated general-purpose pins that can be configured as either inputs or Output .You don’t have control over Pull-up/Pull-down selection in the GPIO peripheral registers.

That is already set in the SYSCFG1 registers regardless of the GPIO direction ( Input/output) set in the direction register .So, the Pull-up/Pull-down functionality remains the same as we set in the SYSCFG1 register, if you don’t want that option you need to disable it the PUPD_ENA resister.

Regards

Antony

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