about PMIC_ON_REQ pin on i.MX7 Dual

[george]

Dear all,

Please tell me about the output pins of i.MX7D.

Now we have a question about the PMIC_ON_REQ pin type, because the documentation provided by NXP does not clearly explain it.

In addition, I found two different posts in this community.

PMIC_ON_REQ design on i.MX7 SABRE 

About PMIC_ON_REQ

One says it's a push-pull type and the other says it's an OpenDrain type.

Which is correct?

[Yuri]

@george 
Hello,

   Hardware Development Guide for i.MX7 states, that PMIC_ON_REQ is push-pull output.
The datasheet does not show that any internal pulling resistors are present for this pin,
and there are no statement about external resistor need for the PMIC_ON_REQ.

Regards,
Yuri.

[george]

Dear @Yuri, 

Sorry, I noticed that the URL link above was incorrect

Please try to see this link again.

PMIC_ON_REQ design on i.MX7 SABRE 

About PMIC_ON_REQ <== I updated this link.

Furthermore, I am now trying to check the PIN type using the i.MX 7D-SABRE board.

After removing the R280, the voltage level of the PMIC_ON_REQ looks slightly unstable, It's like a weak pull-up.

 BR, George

[Yuri]

@george 
Hello,

    PMIC_ON_REQ is active driven output, without internal pull resistors,
as shown on the figures of

https://community.nxp.com/t5/i-MX-Processors/PMIC-ON-REQ-design-on-i-MX7-SABRE/m-p/654268

Regards,
Yuri.

[george]

Dear @Yuri ,

My apologies for asking so much of you.

Did you check the URL link I updated?

We want to clear this contradiction for the future.

We will wait for updates from you.

BR,

George