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SLSC Backplane signals

Hi I recently designed an SLSC-type PCB and one of the boards isn't recognized once I power the chassis.  So I started digging into the backplane signals and discovered a few in there that weren't intuitive as to their function. 

So I found a disconnection between ED_SS# and my CPLD. Could this be the reason the chassis doesn't see my card? What is this signal used for?

Also what is INTIN_N and TRIGIN and TRIG OUT for? Is this documented anywhere?

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These documents should give you enough information

https://www.ni.com/docs/en-US/bundle/slsc-mdk-design-specs/resource/375719g.pdf

https://www.ni.com/docs/en-US/bundle/slsc-mdk-rti-design-specs/resource/376860d.pdf

 

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Santhosh
Soliton Technologies

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