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ZedBoard Hardware Design JC and JD PMOD Resistors for Single-Ended
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JC and JD PMOD Resistors for Single-Ended

Former Member
Former Member over 8 years ago

Hey,

Sorry to beat a (few) dead horses [1] [2] [3] but would like a bit of clarification on using the Differential JC/JD PMOD's for single-ended mode.

In the linked posts it has been claimed that it can be done simply by constraining it IE:

sample xdc:

set_property PACKAGE_PIN AB6  [get_ports my_signal]; #JC1-N
...
  set_property IOSTANDARD LVCMOS33 [get_ports -of_objects [get_iobanks 13]];
   
  However my questions are:
   
  (1) Can you apply unique signals to every available IOB? Use P/N completely independently? 
   
  (2) Do you need to explicitly state diff_term to false in the xdc file, IE
   
  set_property DIFF_TERM FALSE [get_ports my_signal]
   
  for each of these ports?
   
  (3) Do you need to change the Resistors on these ports from the 0 ohms to the 200 ohms JA, JB, and JE use? Shown on Sheet 3
   
  Thanks!
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  • drozwood90
    0 drozwood90 over 8 years ago

    Hi there,

    Digilent handles educational support for Zedboard.  You can visit their forums at:
    https://forum.digilentinc.com

    Thanks!

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