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MiniZed schematics "NTR" designator meaning?

eric2pg

I'm looking at the schematics for the MiniZed from:

http://zedboard.org/sites/default/files/documentations/MiniZed_Rev_1_Schematic.zip

 

There are symbols that look like resistors that have reference designators "NTR[1:16]".  I'm curious as to what these mean?  They aren't in the BOM, so they don't seem to be physical components.  I haven't been able to find a general "reference designator" list which gives meaning to "NT" or "NTR".

 

Mostly they seem to bridge two nets of different names, which okay, this could be a way to "properly" do that or get around DRC errors/warnings.  But this is not always the case, see NTR14/15/16.  So...  What are these?

 

Thanks,

Eric

  • Hi Eric,

     

    I don't know what the designation expands to, but I've looked at a board and they are just shorted links. They have the footprint of a SMD resistor, but are shorted down the center, and no component is placed. In theory the short could be cut out, and replaced with a resistor - perhaps for troubleshooting by isolating, or for inserting a small resistance for signal integrity reasons.

  • Hi,

     

    Those are net ties. From an Altium tools perspective, it allows you to name each side of the NTR different net names. For instance, one side is named PMIC_SYS_RST_N and the other is named EMMC_RST_N.image

     

    -Josh