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Adventurer
Adventurer
2,700 Views
Registered: ‎03-15-2016

IO port pullp/down resisitor

Hi, I have a input port which is LVCMOSS33 in kentex7 fpga, what is the default pullup or pulldown resistor? if I change to PULLUP True or PULLdown True, what it will be? Thanks
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Scholar
Scholar
2,698 Views
Registered: ‎06-05-2013

@jumper_qb This is it

https://forums.xilinx.com/t5/Silicon-Devices-Others-Archived/Pull-up-and-Pull-down-value/td-p/16564

-Pratham

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Xilinx Employee
Xilinx Employee
2,687 Views
Registered: ‎08-01-2008

Checlk FPGA family datasheets DC specification tables

https://www.xilinx.com/support/documentation/data_sheets/ds182_Kintex_7_Data_Sheet.pdf

 

Refer these document as well for detail usage 

 

https://www.xilinx.com/support/documentation/sw_manuals/xilinx2017_2/ug912-vivado-properties.pdf

https://www.xilinx.com/support/documentation/sw_manuals/xilinx2017_2/ug974-vivado-ultrascale-libraries.pdf

Thanks and Regards
Balkrishan
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Adventurer
Adventurer
2,685 Views
Registered: ‎03-15-2016

thanks,is the data apply for the default value, what's the value when I set_property PYULLUP TRUE....
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Xilinx Employee
Xilinx Employee
2,682 Views
Registered: ‎08-01-2008

PYULLUP TRUE. means VIN = 0V, VCCO = 3.3V check DC values in target device
Thanks and Regards
Balkrishan
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Moderator
Moderator
2,679 Views
Registered: ‎07-23-2015

@jumper_qb This AR https://www.xilinx.com/support/answers/67577.html pretty much answers what you are looking for. It explains with example. 

 

 

- Giri
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Adventurer
Adventurer
2,663 Views
Registered: ‎03-15-2016

understand. then what if I didn't set pullup true, is there any pullup or pull down there?> Thanks
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Moderator
Moderator
2,638 Views
Registered: ‎07-23-2015

@jumper_qb By default it should be "None". Only if you set, it will get applied. 

- Giri
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