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Altera_Forum's avatar
Altera_Forum
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17 years ago

RPA FLEX 10K problem with data bus

Hi All This may well be the wrong place to ask this question. If so, I apologize in advance... just ignore my ignorance. On the off chance I am in the right place... The project I am cur...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
17 years ago

Hi,

Not sure how you are wr/rd to your ram but I don't see you are tristating your bidirectional data pins correctly. You better have two internal buses one for reading your ram and one for writing to your ram then mux them to the bidirectiona pins. You need to avoid bus contention with external drive. When you want to receive input from external device your pins must be tristated.