AM3352: USB1_DRVVBUS/GPIO3_13 control issue

Hou William

Part Number: AM3352
Other Parts Discussed in Thread: TPS2051

Tool/software:

USB power control output problem.

BBB_SCH:
The USB power output is controlled by “USB1_DRVVBUS/GPIO3_13” of am3352 to control the EN pin of TPS2051BDGNR.

If the EN pin of the TPS2051BDGNR is controlled by VDD_3V3A, is it possible ？(see the following figure)

0 Jiahui Gao 8 months ago

Hi expert,

Any updates?

0 Nick Saulnier 8 months ago in reply to Jiahui Gao

Hello,

Your question got sent to the AM335x team. I assume you wanted the thread to go to the TPS2051 team instead?

I am sending your thread over to the TPS2051 team for now.

Regards,

Nick

0 Jiahui Gao 8 months ago in reply to Nick Saulnier

Thanks.

So which E2E post I should follow up？

0 Ke Wang 8 months ago in reply to Jiahui Gao

Hi Jiahui,

You can just follow this thread. I'll look into the question and get the answer to you tomorrow.

BR,

Ke Wang

0 Ke Wang 8 months ago in reply to Jiahui Gao

Hi JIahui,

More inputs are needed:

1. How you get VDD_3V3A? Is it a constant 3.3V high or it's a controllable logic?

2.What's the function you need when you say "control by VDD_3V3A"?

Generally when you remove R122, 0.5xVDD_3V3A is the only thing TPS2051 EN pin can see.

BR,

Ke Wang

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