Different POR behavior between MCIMX6Q-SDB and MCIMX6DL-SDP

[torus1000]

Hi,

I compared two reference boards then found a difference.

In case of POR (JTAG_nSRST: pin15) asserted, MCIMX6DL-SDP rebooted but MCIMX6Q-SDB freezed.

I used same Linux versions for both of them.

Why POR caused such different results?

Can anyone explain me?

[torus1000]

What's the status now?

Any updates you may have would be greatly appreciated.

jamesbone‌

[jamesbone]

Hello Torus,

There are several versions of the SABRE-SDP and SABRE-SDB boards, can you please clarify, the versions of the boards that you are seeing with a different behavior? So we can review the schematics and provide the changes and this may show the different behaviors in the POR.

[b50231katsuhiro]

Hi jamesbone‌

Torus is DFAE in a region, so could you please follow-up this case?

[torus1000]

Hi jamesbone,

Any update? I just want to make sure...

Thanks.jamesbone

[torus1000]

jamesbone‌

Dear jamesbone,

Here are my board's revisions:

- MCIMX6Q-SDB         SCH－27516 REV C4

- MCIMX6DL-SDP         SCH－27417 REV C2

Please have a look. It seems same circuit around JTAG_nSRST.

Thanks.