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andrew888
Newbie
Newbie
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Registered: ‎05-17-2018

Voltage rails on FPGA_DONE

Several questions on Zynq-7000 series:

 

  1. Which voltage rail(s) are needed for FPGA_DONE?
  2. Does power sequencing on the rails affect FPGA_DONE?
  3. If the VCC_IO of a particular user IO bank is not stable, does it affect FPGA_DONE?

 

Thanks,

Andrew

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ashok.cheepati
Contributor
Contributor
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Registered: ‎01-18-2013

  1. Which voltage rail(s) are needed for FPGA_DONE?

Comment: Connect FPGA_Done to an external 330 ohm pull up resistor to VCCO_0(Bank o supply voltage)

2. Does power sequencing on the rails affect FPGA_DONE?

Comment: If you follow power sequencing recommended by xilinx. There won't be any problem.

3. If the VCC_IO of a particular user IO bank is not stable, does it affect FPGA_DONE?

comment: what is meant by IO bank voltage is not stable. Most of the dedicated pins of your FPGA will residein the Bank 0. You should provide stable voltage within the limits suggested by xilinx 7-series DC-DC characteristics.

 

If it is useful kudos and accept it as a soultion

 

Best Regards,

--Ashok

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drjohnsmith
Teacher
Teacher
756 Views
Registered: ‎07-09-2009

 

some links might be of use,

 

https://www.xilinx.com/support/documentation-navigation/design-hubs/dh0052-zynq-7000-power-management-hub.html

 

https://www.xilinx.com/support/documentation/user_guides/ug470_7Series_Config.pdf

 

'done' is a open drain pin, so it can only pull down, relying upon pul ups to vcc

 

Ensure your supplies are stable and within spec before configuring / booting,

 

 

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