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nzeut
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Registered: ‎08-31-2016

Xilinx 7-Series STARTUPE2 documentation

I've read UG470 for the STARTUPE2 primitive, but it doesn't make it clear which values the USERDONETS / USRCLKTS enables. Through trial and error, I've found that I need USRCLKTS = '0' for routing CCLK to access program SPI after boot, and USRDONETS = '1' for "normal" non STARTUPE2 operation of the Done signal.The documentation reads like the DONE pin's normal operation would be preserved with '0' here, but '0' places USERDONEO on the DONE pin.

 

If there is better documentation regarding this primitive, it would be nice to know where it is, otherwise, I'd like to push for a more fleshed out documentation complete with truth tables.

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