ERROR:Place:1073 - Placer was unable to create RPM[IOB_RPMs] for the component
DDR2_LDQS_N of type IOB for the following reason.
The reason for this issue:
Some of the logic associated with this structure is locked. This should cause
the rest of the logic to be locked.A problem was found at site PAD202 where
we must place IOB IO_x_x_x_x_x_x_x_x_x_x in order to satisfy the relative
placement requirements of this logic. IOB DDR2DATA<11> appears to already be
placed there which makes this design unplaceable. The following components
are part of this structure:
约束中我已添加了红色部分，是参照IP核生成的例子中，不知道约束还要添加什么？？ |
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