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Altera_Forum
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13 years ago

EPF10K10 and CPU reset using INIT_DONE

Hi There! Yes, I'm using an EPF10k10 :-) So I'm considering using INIT_DONE to hold my Z80 in reset during configuration. I'd also like to be able to manually reset, so I'd like to know if I c...
Altera_Forum's avatar
Altera_Forum
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13 years ago

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To verify: After configuration, does INIT_DONE go tristate or high / low? I'm assuming it's tristating..

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p68 indicates that INIT_DONE is open-drain:

http://www.altera.com/literature/hb/cfg/cfg_cf51005.pdf

Its driven low until configuration completes. Its up to you to supply the external pull-up to make it go high.

Cheers,

Dave