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Newbie prasanup
Newbie
460 Views
Registered: ‎01-22-2019

Regarding PULLUP value provided by the PULLUP primitive in the VIVADO

Hello all,

 

I am implementing a design on VIRTEX7 xc7vx690Tffg1926-2  FPGA. PULLUP primitive is used as an instance connected to the one of the IO pins in top level rtl. Could anyone please tell the pullup value provided by the PULLUP instance..?

 

Thanks,

Prashanthi 

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2 Replies
Xilinx Employee
Xilinx Employee
440 Views
Registered: ‎03-07-2018

Re: Regarding PULLUP value provided by the PULLUP primitive in the VIVADO

Hello @prasanup

YOu can calculate pull up resistor value from datasheet provide VCCO and IRPU value.

Rpullup = VCCO/IRPU

For more information check https://www.xilinx.com/support/answers/20484.html , https://www.xilinx.com/support/answers/67577.html

and http://www.xilinx.com/support/documentation/data_sheets/ds183_Virtex_7_Data_Sheet.pdf

Regards,
Bhushan

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Newbie prasanup
Newbie
314 Views
Registered: ‎01-22-2019

Re: Regarding PULLUP value provided by the PULLUP primitive in the VIVADO

For the PULLUP value calculation the below formula is used

  • Rpu = Vcco / Irpu(max)

In the above formula why only maximum value of Irpu is considered?

 

Thanks,

Prashanthi

 

 

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