You may be in the market for a power supply supervisor, to delay FPGA configuration until some other component on the board is 'spun up' and ready. I've added the following to the mini-FAQ post in the New User Forum README thread.
FPGA doesn't configure from SPI on power up - configuration needs to be delayed link#1 link#2
If anyone would like to nominate better threads for linking in the mini-FAQ, please let me know... (and thanks!)
-- Bob Elkind
SIGNATURE:
README for newbies is here: http://forums.xilinx.com/t5/New-Users-Forum/README-first-Help-for-new-users/td-p/219369
Summary:
1. Read the manual or user guide. Have you read the manual? Can you find the manual?
2. Search the forums (and search the web) for similar topics.
3. Do not post the same question on multiple forums.
4. Do not post a new topic or question on someone else's thread, start a new thread!
5. Students: Copying code is not the same as learning to design.
6 "It does not work" is not a question which can be answered. Provide useful details (with webpage, datasheet links, please).
7. You are not charged extra fees for comments in your code.
8. I am not paid for forum posts. If I write a good post, then I have been good for nothing.
