我的设计中ScanEnable信号是两个输入信号相与的结果。在带DFT综合的时候,在插入扫描链之前和之后分别Write_test_protocol生成spf文件,两次都会报警告。插入之前警告说
Writing test protocol file 'XX00.spf' for mode 'all_dft'...
Warning: Protocol generated after insertion in Internal Pins Flow is not accurate and can not be used. (TESTXG_53)
插入之后警告说
Writing test protocol file 'XX00.spf' for mode 'Internal_scan'...
Warning: Protocol generated after insertion in Internal Pins Flow is not accurate and can not be used. (TESTXG_53)
我在DFT设置时已经设置了可使用内部信号,并且用hookup开关选项指定了该与门输出为ScanEnable,并设该与门“dont_touch”,不知这两个警告是否可以无视?