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Query on JT4 value on MicroZed rev G

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Erich Nast
Junior(0)
Query on JT4 value on MicroZed rev G

We have come across another issue with the Microzed (RevG) boards that we received through this order. JT4 is specified in the schematics (“Schematic_G-04-02” page 6) and the carrier design guide (“5274-MicroZed-Carrier-Design-Guide-rev-1-5-V1.pdf” page 14) as a 1k resistor (source: http://zedboard.org/support/documentation/1519). The BOMs (MicroZed_RevG_BOMs) incorrectly specify JT4 as a 0R resistor. This effectively makes the pin attached to this resistor (U13) unusable by the user. It also potentially introduces a short circuit: if the user pulls pin U13 of the Zync low, VCCO_34 and GND are effectively short-circuited which can cause the part to fail. We can modify the current batch ourselves, but please send this information through to your production people ASAP so that this issue can be addressed in future production runs

JFoster
Moderator(76)
Thank you Erich, I will look

Thank you Erich, I will look into this and seek any corrective action nessecary.

 

--Josh

JFoster
Moderator(76)
Hello Erich,

Hello Erich,

Thank you for pointing this error out. We will work on getting this corrected as soon as possible. We will also generate an erata highlighting this information.

--Josh

Erich Nast
Junior(0)
Hi Josh,

Hi Josh,
Thanks for the reply. Meantime, what should I suggest to my customer? Should he modify the boards we have delivered to him with this error?

JFoster
Moderator(76)
Hello Erich,

Hello Erich,

Sorry for the delay.

If your customer is capable of completing the rework on their own that would be best. Otherwise contact us at customize@avnet.com and we will work something out.

If your customers application requires this specific IO for future MicroZed purchases please contact customize@avnet.com to ensure any future product purchased will have the necessary changes.

Thanks,

Josh