AM3356 GPIO related

Naveen M94353

Prodigy 90 points

1.What is the Source current of Each GPIO?

1.Shall we configure each GPIO as interrupt pin?

over 13 years ago

0 JJD over 13 years ago

TI__Guru* 86600 points

Naveen, please read the chapter 25 of the TRM, this explains how to setup GPIO signals.

Regards,

James

0 peaves over 13 years ago in reply to JJD

TI__Guru 63055 points

The AM335x has multiple I/O power domains that allow some GPIOs to operate at one I/O voltage while others operate at another I/O voltage. The assignment of GPIO terminals to power terminals is documented in the Ball Characteristics Table of the AM335x Data Sheet.

AM335x has 4 banks of GPIO (GPIO0 – GPIO3) and each bank can be configured to support up to two interrupt inputs.

There is not a one to one correlation of GPIO banks to power domains. For example, the GPIO0 bank may be split across as many as 4 power domains depending on the AM335x package.

Regards,
Paul

0 Maneesh over 13 years ago in reply to peaves

TI__Intellectual 1835 points

@Naveen,

AM335x TRM (Technical Reference Manual) is referred above. You can find it here in case you need it:

http://www.ti.com/litv/pdf/spruh73c

Thanks.

0 Maneesh over 13 years ago in reply to Maneesh

TI__Intellectual 1835 points

@Paul, if possible, could you please advise on source current from each GPIO? Thanks!

0 peaves over 13 years ago in reply to Maneesh

TI__Guru 63055 points

I may not have read this question correctly during my first reply. I though the question was related to which power domain provided power to the respective I/O buffer.

After re-reading the question, it sounds like the question may be asking about output current of each I/O buffer.

This information is provided as part of the respective Voh and Vol parameters shown in the DC Electrical Characteristics section of the AM335x data sheet.

http://www.ti.com/product/am3358

Regards,
Paul

0 kolipaka srihari ganesh over 11 years ago in reply to peaves

Prodigy 20 points

sir; am write a program on 4leds using gpio pins to blink with binary numbers (from 0000 to 1111). i dn't no how to write so plz give any examples releated to gpio pins.

0 kolipaka srihari ganesh over 11 years ago in reply to kolipaka srihari ganesh

Prodigy 20 points

sir; am write a program on 4leds using gpio pins to blink with binary numbers (from 0000 to 1111). i dn't no how to write so plz give any examples releated to gpio pins. am using sitara 3359 arm cortex a8 processor