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Altera_Forum
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15 years ago

DDR PIN placement error

Hi all, I use a Cyclone IV E EP4CE40F23C8 with Quartus 11.0 I have this error message when i try to place ddr pins --- Quote Start --- Error: altmemphy pin placement was...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
15 years ago

the error message is pretty helpful in this case. for example, pin U15 is not a legal placement for a DQS pin, or even a DQ pin. you should open the pin planner and take a look at the S pins to know where the legal DQS pins are, and Q for the legal DQ pin locations

you may need to rework your pin out to allow for compatible VCCIO on your DDR banks