Forum Discussion

New Contributor

6 years ago

What is the initial state of MAX II devices pre-programming?

What is the initial state of the EPM1270F256I5 before the first programming? I'm trying to determine how to bias it.

Regular Contributor

6 years ago

Hi Noah,

IO pins will not stay in tri-state after power-up. It will follows what you have programmed and set in Quartus.

DEV_CLRn are low by default after power-up. Meanwhile for DEV_OE, it has to be asserted so that the other IO pin will not remain in tri-state mode.

Regards,