[SI-LIST] Re: CPLD getting blown on board
- From: steve weir <weirsi@xxxxxxxxxx>
- To: si-list@xxxxxxxxxxxxx
- Date: Fri, 07 Jun 2013 08:06:28 -0700
One more item to list to the many good suggestions offered: Make sure
that you don't have a power sequencing problem during shut-down as well
as power on. As it is during power up / power down your device fails, I
would go after the power sequencing, VRM overshoot first.
Steve.
On 6/7/2013 5:38 AM, Sam Pete wrote:
> Hi Friends,
> I am working on a medical board which has multi-core CPU along with other
> peripherals.
> we are getting into some issue that CPLD is getting blown out during power
> cycle or sometimes during reset.
> out of 210 boards we produced, we have 3 boards exhibiting this issue. The FA
> report from CPLD vendor says electrical over-stress...
> The board is not having any hotswap peripherals.... CPLD has 2.5V and 3.3V
> banks, 3.3V Core/IO supply comes up first then 2.5V.
> We have gone thru all sorts of checks, negative tests etc., to reproduce this
> issue and we were unsuccessful....
> Does anybody faced similar issues earlier? Appreciate if you can provide some
> clues...
>
> thanks
> Sam
>
> ------------------------------------------------------------------
> To unsubscribe from si-list:
> si-list-request@xxxxxxxxxxxxx with 'unsubscribe' in the Subject field
>
> or to administer your membership from a web page, go to:
> //www.freelists.org/webpage/si-list
>
> For help:
> si-list-request@xxxxxxxxxxxxx with 'help' in the Subject field
>
>
> List forum is accessible at:
> http://tech.groups.yahoo.com/group/si-list
>
> List archives are viewable at:
> //www.freelists.org/archives/si-list
>
> Old (prior to June 6, 2001) list archives are viewable at:
> http://www.qsl.net/wb6tpu
>
>
>
--
Steve Weir
IPBLOX, LLC
1580 Grand Point Way
MS 34689
Reno, NV 89523-9998
www.ipblox.com
(775) 299-4236 Business
(866) 675-4630 Toll-free
(707) 780-1951 Fax
All contents Copyright (c)2013 IPBLOX, LLC. All Rights Reserved.
This e-mail may contain confidential material.
If you are not the intended recipient, please destroy all records
and notify the sender.
------------------------------------------------------------------
To unsubscribe from si-list:
si-list-request@xxxxxxxxxxxxx with 'unsubscribe' in the Subject field
or to administer your membership from a web page, go to:
//www.freelists.org/webpage/si-list
For help:
si-list-request@xxxxxxxxxxxxx with 'help' in the Subject field
List forum is accessible at:
http://tech.groups.yahoo.com/group/si-list
List archives are viewable at:
//www.freelists.org/archives/si-list
Old (prior to June 6, 2001) list archives are viewable at:
http://www.qsl.net/wb6tpu
Other related posts:
