BB-X15 Rev C Schematics & ewiki update?

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William A. Mills

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Sep 3, 2017, 12:11:19 PM9/3/17
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Hello,

Now that BB-X15 Rev C is shipping in decent quantities, can we get an update to elinux wiki? The last status update was February.  [1]

I saw that Jason added the RevC2 BOM to the x15 github project. [2]
I also saw Robert say that RevC was basically the same as Rev B expect with the 2.0 version of the AM572x and a "few other parts changes".

Can someone confirm that the netlist for Rev C2 is *exactly* the same as Rev B1 (aside from part changes)?
If not can we get a copy of the Rev C schematics?
I don't have OrCad but I can get someone at work to create netlists for comparison.


Thanks,
Bill

Gerald Coley

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Sep 3, 2017, 12:19:26 PM9/3/17
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Yes, I can confirm that.

 

Rev C schematic is the same as the Rev B1 except for the processor revision.

 

I will create a Rev C schematic for you. I need to change the revision on each page and add a 2.0 to the schematic symbols. That will not however, affect the netlist.

 

Once I get this done, then Jason can add it to the WIKI.

 

Gerald

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William A. Mills

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Sep 3, 2017, 1:11:06 PM9/3/17
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Gerald,

Thanks.  If that is all it is, then no hurry on the Rev C schematics.  Jason can just put a note on the wiki &| the github files stating as much.

I am currently trying to diff the BOMs.  diff is useless so it looks like I will have to write a script.

Thanks,
Bill

​

William A. Mills

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Sep 3, 2017, 1:25:48 PM9/3/17
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... or I could just look at the "changes" sheet in the BOM excel!

Gerald Coley

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Sep 3, 2017, 2:00:56 PM9/3/17
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The BOM has a revision page with the changes for each revision. We addd some new par tnumbers for some alternate sources due to some obsolete parts a while back. But that was it. Nothing in the design itself changed.

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William A. Mills

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Sep 3, 2017, 4:32:40 PM9/3/17
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Thanks Gerald.  I did find the change sheet after a bit.

When you have alternatives like the Kingston vs Micron for eMMC and DDR parts, who picks which one is used?  The manufacturer (PTI)?  Can it change from one production run to another?  Or do you dictate when that happens and potentially give it a new RevC3 etc?

Thanks,
Bill

On Sun, Sep 3, 2017 at 2:00 PM, Gerald Coley <gco...@emprodesign.com> wrote:

The BOM has a revision page with the changes for each revision. We addd some new par tnumbers for some alternate sources due to some obsolete parts a while back. But that was it. Nothing in the design itself changed.

 

 

From: beagl...@googlegroups.com [mailto:beagleboard@googlegroups.com] On Behalf Of William A. Mills
Sent: Sunday, September 3, 2017 12:11 PM
To: beagleboard <beagl...@googlegroups.com>
Subject: Re: [beagleboard] BB-X15 Rev C Schematics & ewiki update?

 

Gerald,

 

Thanks.  If that is all it is, then no hurry on the Rev C schematics.  Jason can just put a note on the wiki &| the github files stating as much.

 

I am currently trying to diff the BOMs.  diff is useless so it looks like I will have to write a script.

 

Thanks,

Bill

 

​

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Robert Nelson

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Sep 3, 2017, 5:34:46 PM9/3/17
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On Sep 3, 2017 3:32 PM, "William A. Mills" <wm.a....@gmail.com> wrote:
Thanks Gerald.  I did find the change sheet after a bit.

When you have alternatives like the Kingston vs Micron for eMMC and DDR parts, who picks which one is used?  The manufacturer (PTI)?  Can it change from one production run to another?  Or do you dictate when that happens and potentially give it a new RevC3 etc?

Those parts are 100% swappable, so depending on price and availability...

Regards,

Gerald Coley

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Sep 3, 2017, 7:27:19 PM9/3/17
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The market picks it. We typically use what we can buy.  It can change from one production build to the next.

 

This happens all the time on the Hardware world. That is why the SW has to be ready to handle all of them.

 

Gerald

 

From: beagl...@googlegroups.com [mailto:beagl...@googlegroups.com] On Behalf Of William A. Mills
Sent: Sunday, September 3, 2017 3:32 PM
To: beagleboard <beagl...@googlegroups.com>
Subject: Re: [beagleboard] BB-X15 Rev C Schematics & ewiki update?

 

Thanks Gerald.  I did find the change sheet after a bit.

 

When you have alternatives like the Kingston vs Micron for eMMC and DDR parts, who picks which one is used?  The manufacturer (PTI)?  Can it change from one production run to another?  Or do you dictate when that happens and potentially give it a new RevC3 etc?

 

Thanks,

Bill

On Sun, Sep 3, 2017 at 2:00 PM, Gerald Coley <gco...@emprodesign.com> wrote:

The BOM has a revision page with the changes for each revision. We addd some new par tnumbers for some alternate sources due to some obsolete parts a while back. But that was it. Nothing in the design itself changed.

 

 

From: beagl...@googlegroups.com [mailto:beagl...@googlegroups.com] On Behalf Of William A. Mills
Sent: Sunday, September 3, 2017 12:11 PM
To: beagleboard <beagl...@googlegroups.com>
Subject: Re: [beagleboard] BB-X15 Rev C Schematics & ewiki update?

 

Gerald,

 

Thanks.  If that is all it is, then no hurry on the Rev C schematics.  Jason can just put a note on the wiki &| the github files stating as much.

 

I am currently trying to diff the BOMs.  diff is useless so it looks like I will have to write a script.

 

Thanks,

Bill

 

​

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William A. Mills

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Sep 4, 2017, 6:56:43 AM9/4/17
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OK, I know I am asking lots of questions.  Sorry but ...

Does the X15 RevC need an **isolated** power supply?
If not, did any rev?

----

The TI GPEVM says that you need an "isolated" power supply. [1]
I don't see any such statement on the X15 wiki or UG. [2]

I bought the power supply recommended by the Digikey website which is VEC65US12.  This is one of the recommendations
of the eLInux x15 wiki page.

With the power supply disconnected, I measure continuity from the AC ground plug to the outside barrel of the 12V connector.  To me this means it is not isolated.

Is my definition of isolated correct?

I would be happy to update the eLinux wiki with your answers to these questions if I am allowed.

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Gerald Coley

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Sep 4, 2017, 9:12:31 AM9/4/17
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It does not need an isolated power supply. UL would not be happy about that.

 

Gerald

 

 

From: beagl...@googlegroups.com [mailto:beagl...@googlegroups.com] On Behalf Of William A. Mills
Sent: Monday, September 4, 2017 5:56 AM
To: beagleboard <beagl...@googlegroups.com>
Subject: Re: [beagleboard] BB-X15 Rev C Schematics & ewiki update?

 

OK, I know I am asking lots of questions.  Sorry but ...

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