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Altera_Forum
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16 years ago

how can i connect the VREFB pins of EP3C40F324

I want to connect a DDR SDRAM to bank3 and bank4 of EP3C40F324, the interface is SSTL_2, except data,address,command signals, and i need a 1.25V reference, but there is four VREFB pins in one bank of...
Altera_Forum's avatar
Altera_Forum
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16 years ago

If they would be shorted together, they couldn't be used as individual I/Os, but they can. Thus this description is generally incorrect. However, as I said, I'm not sure what is required with voltage referenced I/O standards, that have only outputs in a VREF group. I would simply follow the Quartus pinout file in this point.