topic Re: i.MX6 Automatic Power-ON in i.MX Processors

i.MX6 Automatic Power-ON

ko-hey — Thu, 23 Oct 2014 07:39:24 GMT

I am designing a system with i.MX6 Solo processor with MMPF0200.

My system needs the Processor to turn ON automatically when the power is applied ( No Button press).

In below community, if we need to turn ON automatically, we should control the POR_B.

https://community.freescale.com/message/358993#358993

So, I thought the attached circuit.

Is it correct?

If the circuit is correct, what is the recommend connections of PMIC_ON_REQ ?

Please clarify,

Sincerely

Re: i.MX6 Automatic Power-ON

igorpadykov — Thu, 23 Oct 2014 11:59:55 GMT

Hi ko-hey

I think it is correct, also would recommend to connect

PMIC RESETBMCU to processor POR as done in Sabre SD

schematic. PMIC_ON_REQ may be left unconnected.

Best regards

igor

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Re: i.MX6 Automatic Power-ON

ko-hey — Mon, 27 Oct 2014 00:38:27 GMT

Igor

Thanks!

I understood.

ko-hey

Re: i.MX6 Automatic Power-ON

shichinhuang — Thu, 21 Jan 2016 01:33:25 GMT

Hi igor,

But if disconnect PMIC_ON_REQ signal from i.MX6 to PMIC,

you cannot power off PMIC power when you normally shut down from OS.(ex: press power off icon of Linux.)

Do you have any idea about auto power on and also support PMIC off when system normally shut down from Linux?

Thanks!

Regards,

Shichin

Re: i.MX6 Automatic Power-ON

ludovicberthuy — Thu, 29 Jun 2017 06:26:48 GMT

Hello Shichin Huang,

Did you find by any chance a way to get rid of the "power on" button?

We're facing the same issue and we'd appreciate if you could share a solution to that.

Regards,

Ludovic

Re: i.MX6 Automatic Power-ON

shichinhuang — Fri, 30 Jun 2017 01:26:34 GMT

Hi Ludovic,

I use a reset IC to simulate the behavior of power button.

Sincerely,

Shichin

Re: i.MX6 Automatic Power-ON

ludovicberthuy — Fri, 30 Jun 2017 05:54:40 GMT

Ok, that's exactly what we were planning to do too as a last resort.

It's such a shame for an embedded device to require an action from a human in order to power-up.