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Altera_Forum
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17 years ago

Cyclone III user I/O stay LOW during JTAG configration

Hi,all I found all user I/Os became LOW during JTAG configruation in my situation. The device is Cyclone III 3C35. However, it is said that user I/Os must be tri-stated during JTAG configuration i...
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Altera_Forum
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17 years ago

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I didn't see this phenomena on the platform of the Altera Cyclone 3 starter board

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Yes that's what I expected, too. Dual purpose pins are acivated in configuration state according to MSEL.