TMS320F280049: GPIO current limited value

Rayna Wang

Part Number: TMS320F280049

Hi team,

I have some confusion about the data in following figures.

As the 5.6 figure shown, when the GPIO output low level, the maximum current IOL is 4mA. However, in the 5.1 figure, the range of output current is from -20mA to 20mA, does this mean that the maximum GPIO output current is 20mA?

What's the different of these two variables?

Thanks!

Best Regards/Rayna

over 5 years ago

0 Hareesh Janakiraman over 5 years ago

TI__Guru* 95315 points

The 20 mA number is under Absolute Max Ratings. It is the clamp current. Not the current during normal operation. The note under the table says the following clearly:

These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated under Section 5.4 is not implied.

0 Rayna Wang over 5 years ago in reply to Hareesh Janakiraman

TI__Expert 3680 points

Hi Hareesh,

I should suggest customer the maximum current IOL is 4mA , when GPIO output low level, to keep GPIO work in normal condition, is that right?

Thanks!

-Rayna

0 Hareesh Janakiraman over 5 years ago in reply to Rayna Wang

TI__Guru* 95315 points

Rayna,

Please take a look at https://e2e.ti.com/support/microcontrollers/c2000/f/171/t/747092. That post in turn refers to a few posts where this topic has been dealt with extensively.

C2000™︎ microcontrollers

C2000 microcontrollers forum

TMS320F280049: GPIO current limited value