Strange ONOFF Behaviour URGENT !

[nachodiz]

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

[reyes]

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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[nachodiz]

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:

[Yuri]

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.