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Altera_Forum
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17 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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17 years ago

From CycloneIII Device Family Pin Connection Guidelines, we can see that: All of the VREF pins within a bank are shorted togetherl.

but from CycloneIII EP3C40 Device Pin-out,we can't see the similar description. just a littile unreasonable.