最近在CSDN中下载了一个关于用FPGA实现UDP协议的代码,代码的板子xc6slx45-2csg324,然后我的板子型号是xc3s500e-4pq208,在translate时,报 错,'DataCtrl_inst/SimpleDualRAM_inst/U0/xst_blk_mem_generator/gnativebmg.native_blk_mem_gen/valid.cstr/ramloop[0].ram.r/s6_noinit.ram/SDP.SIMPLE_PRIM18.ram' with type 'RAMB16BWER' could not be resolved. A pin name misspelling can cause this, a missing edif or ngc file, case mismatch between the block name and the edif or ngc file name, or the misspelling of a type name. Symbol 'RAMB16BWER' is not supported in target 'spartan3e'.请问该怎么修改,