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How to interface pmodKEYPAD LVCMOS18 LVDS IO's pins of FPGA


Devaraj

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Hi @Devaraj,

Welcome to the Digilent Forums!

For the Pmod KPYD the rows are driven logic high and the columns are left floating and driven low when the corresponding button is pressed. As long as LVDS LVCMOS18 can overcome the pull ups there should not be an issue. You might want to drive the floating columns high using the pull-up iostandard in the ucf file.  Here is the resource center for the Pmod KYPD. There are VHDL and Verilog examples for using the Pmod KPYD that should be helpful as well.

best regards,

Jon

 

  

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