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In ISE, it is possible to select various "Startup Options" for the generate FPGA image by right-clicking "Generate Programming File", selecting "Process Properties", and then clicking "Startup Options". The listed startup options are:

  • StartUpClk
  • DonePipe
  • DONE_cycle
  • GTS_cycle
  • GWE_cycle
  • DriveDone

This document gives explanations for StartUpClk, DonePipe and DriveDone. What exactly is the DONE_cycle startup option? (And while we're at it, what are GTS_cycle and GWE_cycle?)

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For the DONE option, it is the event that drives the DONE pin high - for more info on this, see "Sequence of Events" in the Spartan-X Configuration Guide (I'm looking at the Spartan-3 version here, as I happen to be working with one, but I'm sure there will be a similar document for Spartan-6. EDIT - yes there is, it's on page 76 of the Spartan-6 configuration guide)

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