topic Re: iMX287 reset issue in i.MX Processors

iMX287 reset issue

___myir — Wed, 28 May 2014 06:56:24 GMT

Hi All,

We used iMX287 MCU to design our board, it has dual ETHs.

But if I enable ETHs from kernel, I can't reset the board by press the reset key or run "reboot" command, and if I disable ETHs from kernel, I can reset the board correctly. Are there any conflicts between the chip and the ETHs? or any points we need to attend when design the board?

I would very appreciate any ideas, thanks.

Jakebo

Re: iMX287 reset issue

___myir — Fri, 30 May 2014 08:59:16 GMT

Hi All,

We got the solution about that, the power of ETHS can't connect to VDDIO, use an extend 3.3v instead.

Re: iMX287 reset issue

gusarambula — Fri, 06 Jun 2014 20:56:30 GMT

I’m glad to hear you got to fix your problem and thank you for posting the solution as this will help other users that find similar issues. The ENETs probably drained more current than what the VDDIO could supply from a PMU perspective, for more information please refer to the PMU section of the i.MX28 Datasheet.