AM3352: nRESETIN_OUT signal

Hiroyasu Tazawa1

Guru 12350 points

Part Number: AM3352

Hi, Everyone

I have a qestion about nRESETIN_OUT of AM335x.

I uderstand it is no effect for warm reset
when nRESETIN_OUT is output.

This understanding is correct ?

Best Regards
Hiroyasu

over 8 years ago

0 Biser Gatchev-XID over 8 years ago

TI__Guru**** 393215 points

Yes, this is the warm reset pin.

0 Biser Gatchev-XID over 8 years ago in reply to Biser Gatchev-XID

TI__Guru**** 393215 points

This is warm reset regardless of the signal direction.

0 Hiroyasu Tazawa1 over 8 years ago in reply to Biser Gatchev-XID

Guru 12350 points

Hi, Biser

I understand Reset is issued, when it is output and forced low.

This understanding is correct ?

Best Regards
Hiroyasu

0 Biser Gatchev-XID over 8 years ago in reply to Hiroyasu Tazawa1

TI__Guru**** 393215 points

Please read section 8.1.7.4 from the AM335x TRM Rev. O. everything is explained there.

0 Hiroyasu Tazawa1 over 8 years ago in reply to Biser Gatchev-XID

Guru 12350 points

Hi, Biser

O.K. Thank you!

Best Regards
Hiroyasu

0 Hiroyasu Tazawa1 over 8 years ago in reply to Biser Gatchev-XID

Guru 12350 points

Hi, Biser

I'm sorry. I have an another question.
Is there a possibility that resetting will be invalid using nRESETIN_OUT?
I read TRM and guess it is no.
This understanding is correct ?

Best Regards
Hiroyasu

0 Hiroyasu Tazawa1 over 8 years ago

Guru 12350 points

Part Number: AM3352

Hi, Everyone

I have a question about nRESETIN_OUT:A10 of AM335x.

Is there any possibility that the reset will not be effective
when nRESETIN_OUT is set to Low?

I think Effect of reset never goes away
when nRESETIN_OUT is set to Low.

Because this warm reset regardless of the signal direction.

This understanding is correct ?

If there is a possibility that a reset will not be issued, please tell me.

Best Regards
Hiroyasu

0 Biser Gatchev-XID over 8 years ago in reply to Hiroyasu Tazawa1

TI__Guru**** 393215 points

I don't understand what you want to say:

"Is there any possibility that the reset will not be effective when nRESETIN_OUT is set to Low?"
"I think Effect of reset never goes away when nRESETIN_OUT is set to Low"

What do you mean by this? How do you set nRESETIN_OUT low?

0 Hiroyasu Tazawa1 over 8 years ago in reply to Biser Gatchev-XID

Guru 12350 points

Hi, Biser

Thank you for your reply.

nRESETIN_OUT is connected to reset button.
and Reset of AM335x sometimes is not issued when reset button is pushed.

As a specification, is there a mode in which reset of AM 335x is not issued ?

Best Regards
Hiroyasu

0 Biser Gatchev-XID over 8 years ago in reply to Hiroyasu Tazawa1

TI__Guru**** 393215 points

Please post the part of the schematic that contains the reset circuit.

0 Hiroyasu Tazawa1 over 8 years ago in reply to Biser Gatchev-XID

Guru 12350 points

Hi, Biser

My customer told me reset cicuit is same as BBB.

My question is whether or not AM335x has a specification that is not reset on nRESETIN_OUT.

Best Regards
Hiroyasu

0 Biser Gatchev-XID over 8 years ago in reply to Hiroyasu Tazawa1

TI__Guru**** 393215 points

The reset pulse is very short and may be masked by the 2.2uF capacitor. Try removing this capacitor.

0 Hiroyasu Tazawa1 over 8 years ago in reply to Biser Gatchev-XID

Guru 12350 points

Hi, Biser

Thank you for your reply.
O.K. We will try it.

and Do you have any answer for this:

My question is whether or not AM335x has a specification that is not r
eset on nRESETIN_OUT.

Best Regards
Hiroyasu

0 Biser Gatchev-XID over 8 years ago in reply to Hiroyasu Tazawa1

TI__Guru**** 393215 points

I don't understand your question.

0 Hiroyasu Tazawa1 over 8 years ago in reply to Biser Gatchev-XID

Guru 12350 points

Hi, Biser

I'm sorry.
I'm talking about AM335x specifiaction.

You told me "This is warm reset regardless of the signal direction."

I think as long as we keep the prescribed reset timing,
Reset is issued in situation.

This understanding is correct ?

If you do not understand, Please let me know again.

Best Regards
Hiroyasu

0 Biser Gatchev-XID over 8 years ago in reply to Hiroyasu Tazawa1

TI__Guru**** 393215 points

Yes, this is correct. If you are asking about the input reset pulse duration, this input is edge-sensitive and the reset sequence is triggered immediately when a high-to-low transition is detected on the pin.

0 Hiroyasu Tazawa1 over 8 years ago in reply to Biser Gatchev-XID

Guru 12350 points

Hi, Biser

Thank you so much too !!

Best Regards
Hiroyasu

Processors

Processors forum

AM3352: nRESETIN_OUT signal