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Valued Contributor III
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erased MAX10, I/Os condition

hello. 

I have a design that use MAX10. i noticed that every time I flash it, many I/Os (if not all of them) are going high, according to the documents, the pins should be tri-stated. 

so first question is, is this phenomenon described anywhere? i couldn't find it... 

second question, is there any way to avoid this (not talking about adding pull down resistors to my design, try to avoid this). 

 

thanks
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Valued Contributor III
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Hi Gilad, how are set pin on pin planner? 

All pin goes high or just some? 

Are you using a development board or your own? 

Best regards
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Valued Contributor III
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All unused pins will show the state defined under Assignments/Device/Device and Pin Options/Unused Pins, which is by default "Tri-stated with weak pull-up". 

 

There should be no unused IO pins with different behavior.
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Valued Contributor III
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assume, a brand new chip of max10,when powered up, how will the io pins perform????????!!!!!!!

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Valued Contributor III
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--- Quote Start ---  

assume, a brand new chip of max10,when powered up, how will the io pins perform????????!!!!!!! 

--- Quote End ---  

 

If chip is brand new or better when is erased with confign low all pin appear as tristate weak pullup.
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