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Valued Contributor III
762 Views

I/O Element

I want to know the number of I/O Element in user I/O. 

CPLD:EPM570T144C5N 

user I/O:116 

 

Does All user I/O have I/O elemenst?  

If it is possible, I want to use all user I/O as bidirectional I/O buffer(inout).
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Valued Contributor III
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Hi there, 

you should check the datasheet as  

user I/O are pins available for your application but some are inputs only.
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Valued Contributor III
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--- Quote Start ---  

Hi there, 

you should check the datasheet as  

user I/O are pins available for your application but some are inputs only. 

--- Quote End ---  

 

 

Thank you for your answer. 

I checked the device handbook. 

but I don't know user I/O which is inputs only. 

If it is possible, please let me know what is inputs only user I/O of EPM570T144C5N.
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Valued Contributor III
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Hi, 

the pinout is defined in http://www.altera.com/literature/dp/max2/epm570.pdf 

As there are no I/O pin defined as input only, the I/O as listed are bidirectional, some (e.g. the Clocksignals) are either dedicated clock signals or can be used as I/O (to be defined in QuartusII) - if you are fine with using the I/O regarding the number of signals to be connected, just use only the I/O...
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