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Altera_Forum's avatar
Altera_Forum
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15 years ago

Same logic high ,but different voltage

Hi,guys. So why different pins have different voltage, while they are all logic high. (In my experiment,one is 1.14V, the other is 3.3V) Appreciate for any reply
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
15 years ago

Sorry for ambiguous statement.

Cyclone II 2C35F672C6,

VCC IO 5V,

Default IO stardard 3.3LVTTL,

10 pF capacity load

P.S. Even in the same dual in-line, pins voltage can be different when all of them are logic high.

rely Cris: They are not ouput of other device or pin, just outputs