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Altera_Forum
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17 years ago

Which bank 1 pins are 3,3V????

Hello everybody, does anybody know which pins in Cyclone III I/O bank# 1 are 3,3 V standard. First I thought the JTAG pins J1, J2, J5 and J6. But now I read that they are at 2,5 V? The bac...
Altera_Forum's avatar
Altera_Forum
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17 years ago

May be I misunderstood your first post. Specifying AS configuration forces a bank1 VCCIO of 3.3V, that's O.K. so far. In my case, the AS serial flash loader IP required 2.5 V for one bank1 pin at the same time, I regarded this as a bug. It was said to be fixed in coming versions.

Altera may optionally support AS memory with 2.5 V supply in future, than the behaviour must be changed.

Specifying PS instead of AS configuration removes all configuration related IO voltage checks. AS can be used for the device anyway, active configuration scheme is defined by MSEL pin strapping only.