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Altera_Forum
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18 years ago

Problems about DDR2!

Error: Too many output and bidirectional pins in I/O bank 3 assigned near VREF pin AB11 (VREFGROUP_B3_N1) on device EP3C120F780C7 -- no more than 9 output and bidirectional pins allowed near the VREF...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
18 years ago

In the Assignment editor you can use the "Output Enable Group" option to group bi-directional pins that are always in the same direction (e.g. dq and dqs lines of DDR). This can help with this error.