AM3358: Reason for some GPIOs connected together

Venugopal_S

Part Number: AM3358

With reference to the BeagleBone Schematic, we see that some of the GPIOs are connected to each other through 0 ohm resistors before coming to the expansion headers.

What is the intention behind this?

over 4 years ago

0 Bill Taboada over 4 years ago

TI__Mastermind 42545 points

Hi Venugopal,

Unfortunately the image you attached is not viewable. Can you be more specific on the GPIOs to which you are referring?

Regards, Bill

0 Venugopal.S over 4 years ago in reply to Bill Taboada

Prodigy 230 points

Hello Bill,

One such example is pins T13 and R13. These are paralleled and connected to single GPIO in the expansion header.

There are a couple of other places too, where two pins are paralleled like this. I hope you can view the image this time.

0 Venugopal.S over 4 years ago in reply to Venugopal.S

Prodigy 230 points

One another set is C18 and B12.

0 Bill Taboada over 4 years ago in reply to Venugopal.S

TI__Mastermind 42545 points

Hi Venugopal,

Normally this type of arrangement would be used to allow either one or the other of the SoC pins to be connected to the expansion connector. On the beaglebone both resistors are installed which is puzzling. Unfortunately the Beaglebone is not a TI product and was not designed by TI. You will have to post this question on the Beaglebone forum.

Regards, Bill

0 Venugopal_S over 4 years ago in reply to Bill Taboada

Prodigy 135 points

Ok. Thank you

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AM3358: Reason for some GPIOs connected together