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Scholar trenz-al
Scholar
10,108 Views
Registered: ‎11-09-2013

OMG, new rule for UltraScale use 4.7 OHM pullup on DONE. Read XAPP1233

This MUST be a mistake.

 

XAPP1233, page 12

DONE internal pullup, external pullup is not used, if implemented should be

 

4.7 OHM

 

ups ? really ?

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3 Replies
Xilinx Employee
Xilinx Employee
10,086 Views
Registered: ‎07-03-2012

Re: OMG, new rule for UltraScale use 4.7 OHM pullup on DONE. Read XAPP1233

This is not a mistake. DONE pin has 4.7kohm external pull-up recommendation for UltraScale family. Refer to UG570, DONE pin description in table 1-9: http://www.xilinx.com/support/documentation/user_guides/ug570-ultrascale-configuration.pdf
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Instructor
Instructor
10,083 Views
Registered: ‎08-14-2007

Re: OMG, new rule for UltraScale use 4.7 OHM pullup on DONE. Read XAPP1233


@kkaur wrote:
This is not a mistake. DONE pin has 4.7kohm external pull-up recommendation for UltraScale family. Refer to UG570, DONE pin description in table 1-9: http://www.xilinx.com/support/documentation/user_guides/ug570-ultrascale-configuration.pdf

There's a big difference between 4.7k ohm and 4.7 ohm (factor of 1,000).  4.7 ohm was obviously a typo in XAPP1233 and should be fixed.

-- Gabor
Xilinx Employee
Xilinx Employee
10,081 Views
Registered: ‎07-03-2012

Re: OMG, new rule for UltraScale use 4.7 OHM pullup on DONE. Read XAPP1233

I agree, table 3 has typo but the figure 6 shows correct pull-up value on DONE.