topic Re: Strange ONOFF Behaviour URGENT ! in i.MX Processors

Strange ONOFF Behaviour URGENT !

nachodiz — Mon, 23 Oct 2017 11:12:24 GMT

When pressing button 5 seconds, pmic goes off and inmediately goes on again

The correct behaviour should be to be off until new pressing its performed

Please see attached PDF Schematic Docs and help me

I need to start massive production just now! (50.000 pcs) near to $50 /pcb

mail: idiz@ebikemotion.com

After 5sec pressing button, PMIC_ON_REQ goes down but it goes up again after 18ms

King Regards

Re: Strange ONOFF Behaviour URGENT !

reyes — Tue, 24 Oct 2017 14:49:24 GMT

Hi Nacho,

Problem seems to be the configuration of the RESTARTEN bit (Bit 0) of the Power control register (PWRCTL), if this bit is set to “1”, the PF3001 restarts automatically after a power off event generated by the PWRON (held low for 4 seconds or longer) when PWR_CFG bit = 1. Make sure this bit is set to “0”.

Have a great day,
Jose

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Re: Strange ONOFF Behaviour URGENT !

nachodiz — Wed, 25 Oct 2017 08:32:53 GMT

Dear Jose

I´ve performed as you commented:

It still fails but, the problem its not the PMIC, its the IMX6!

Because pmic goes off inmediately whrn PWRON its low (tested):

Please help us with this problem we have prodiuction stopped

If we dont fond the solution i PREPARED A VERSION that bypass the soc onoff stuffand perform the onoff function directly with the BIOS PIC MCU

:smileysad:

Re: Strange ONOFF Behaviour URGENT !

Yuri — Thu, 26 Oct 2017 07:08:57 GMT

Hello,

Hope the following helps.

https://community.nxp.com/message/843844

Perhaps it is needed to have the SNVS voltage applied (say, from coin cell)

to avoid the issue.

Regards,

Yuri.