我做的是以太网控制器，在综合之后的MAP时出现这样的提示错误，我查了好多

资料同时也尝试了很多时序约束的设置以及AREA GROUP的设置都不可以？请高手

指点迷津！我将感激不尽！
错误提示：Design Summary
   Number of bonded IOBs:           208 out of    142  146%

(OVERMAPPED)
Section 1 - Errors
------------------
ERRORack:18 - The design is too large for the given device and

package.
   Please check the Design Summary section to see which resource

requirement for
   your design exceeds the resources available in the device.
  

If the slice count exceeds device resources you might try to disable
   register ordering (-r).  Also if your design contains AREA_GROUPs,

you may be
   able to improve density by adding COMPRESSION to your AREA_GROUPs

if you
   haven'