[deadspider187]

 
What are the other 4 gold contacts on the HD-595 driver used for?  Testing?  Other independence?  I'm just curious if these can be used to mod the drivers in any way.
 
Thanks in advance.

 

[harveyaidr]

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Can you share it with us? I've been waiting for the answer, Have you got the answer?

 

[deadspider187]

Unfortunately, no one has responded.  I'm just going to assume they don't have any function.