请教scan chain里面有INV的问题
时间：12-12
整理：3721RD
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用DC插的DFT，插完之后发现，scan def里面chain内部有一些inv，如下
+ ORDERED chip_core_inst/xxx/u_xxx_core_u_xxx_abcde_lsfr1_reg_reg_11_ ( IN SI ) ( OUT QN )
chip_core_inst/xxx/U19332 ( IN I ) ( OUT Z )
chip_core_inst/xxx/U52521 ( IN C2 ) ( OUT ZN )
chip_core_inst/xxx/u_xxx_core_u_xxx_abcde_lsfr1_reg_reg_10_ ( IN D ) ( OUT QN )
chip_core_inst/xxx/U15708 ( IN I ) ( OUT Z )
chip_core_inst/xxx/U52541 ( IN B2 ) ( OUT ZN )
chip_core_inst/xxx/u_xxx_core_u_xxx_abcde_lsfr1_reg_reg_9_ ( IN D ) ( OUT QN )
chip_core_inst/xxx/U52533 ( IN C2 ) ( OUT ZN )
chip_core_inst/xxx/u_xxx_core_u_xxx_abcde_lsfr1_reg_reg_8_ ( IN D ) ( OUT QN )
chip_core_inst/xxx/U11522 ( IN A1 ) ( OUT ZN )
chip_core_inst/xxx/U11523 ( IN B ) ( OUT Z )
chip_core_inst/xxx/u_xxx_core_u_xxx_abcde_lsfr1_reg_reg_7_ ( IN D ) ( OUT QN )
chip_core_inst/xxx/U28607 ( IN I ) ( OUT Z )
chip_core_inst/xxx/U9678 ( IN A1 ) ( OUT ZN )
chip_core_inst/xxx/U9679 ( IN B ) ( OUT Z )
chip_core_inst/xxx/u_xxx_core_u_xxx_abcde_lsfr1_reg_reg_6_ ( IN D ) ( OUT QN )
chip_core_inst/xxx/U35833 ( IN I ) ( OUT Z )
chip_core_inst/xxx/U53588 ( IN I1 ) ( OUT ZN )
chip_core_inst/xxx/u_xxx_core_u_xxx_abcde_crypt_mask_reg_70_ ( IN D ) ( OUT QN )
chip_core_inst/xxx/U2648 ( IN I ) ( OUT Z )
+ ORDERED chip_core_inst/xxx/u_xxx_ppp_u_xxx_pppctrl_cpu_start_reg_reg ( IN SI ) ( OUT Q )
chip_core_inst/xxx/u_xxx_ppp_u_xxx_pppctrl_start_r_reg_reg ( IN D ) ( OUT Q )
chip_core_inst/xxx/u_xxx_ppp_u_xxx_pppctrl_xxx2ppp_start_reg ( IN D ) ( OUT Q )
chip_core_inst/xxx/u_xxx_ppp_ahb2ecc_alg_start_reg_reg ( IN D ) ( OUT Q )
chip_core_inst/xxx/u_xxx_ppp_ahb2ecc_alg_start_reg1_reg ( IN D ) ( OUT Q )
chip_core_inst/xxx/u_xxx_ppp_ahb2ecc_alg_start_reg2_reg ( IN D ) ( OUT Q )
+ ORDERED chip_core_inst/xxx/u_xxx_core_u_xxx_abcde_lsfr3_reg_reg_12_ ( IN SI ) ( OUT QN )
，用Tmax读进来看起来没报错，不过还是担心，请教一下各位这样的scan chain可以吗?允许有INV在里面吗？
+ ORDERED chip_core_inst/xxx/u_xxx_core_u_xxx_abcde_lsfr1_reg_reg_11_ ( IN SI ) ( OUT QN )
chip_core_inst/xxx/U19332 ( IN I ) ( OUT Z )
chip_core_inst/xxx/U52521 ( IN C2 ) ( OUT ZN )
chip_core_inst/xxx/u_xxx_core_u_xxx_abcde_lsfr1_reg_reg_10_ ( IN D ) ( OUT QN )
chip_core_inst/xxx/U15708 ( IN I ) ( OUT Z )
chip_core_inst/xxx/U52541 ( IN B2 ) ( OUT ZN )
chip_core_inst/xxx/u_xxx_core_u_xxx_abcde_lsfr1_reg_reg_9_ ( IN D ) ( OUT QN )
chip_core_inst/xxx/U52533 ( IN C2 ) ( OUT ZN )
chip_core_inst/xxx/u_xxx_core_u_xxx_abcde_lsfr1_reg_reg_8_ ( IN D ) ( OUT QN )
chip_core_inst/xxx/U11522 ( IN A1 ) ( OUT ZN )
chip_core_inst/xxx/U11523 ( IN B ) ( OUT Z )
chip_core_inst/xxx/u_xxx_core_u_xxx_abcde_lsfr1_reg_reg_7_ ( IN D ) ( OUT QN )
chip_core_inst/xxx/U28607 ( IN I ) ( OUT Z )
chip_core_inst/xxx/U9678 ( IN A1 ) ( OUT ZN )
chip_core_inst/xxx/U9679 ( IN B ) ( OUT Z )
chip_core_inst/xxx/u_xxx_core_u_xxx_abcde_lsfr1_reg_reg_6_ ( IN D ) ( OUT QN )
chip_core_inst/xxx/U35833 ( IN I ) ( OUT Z )
chip_core_inst/xxx/U53588 ( IN I1 ) ( OUT ZN )
chip_core_inst/xxx/u_xxx_core_u_xxx_abcde_crypt_mask_reg_70_ ( IN D ) ( OUT QN )
chip_core_inst/xxx/U2648 ( IN I ) ( OUT Z )
+ ORDERED chip_core_inst/xxx/u_xxx_ppp_u_xxx_pppctrl_cpu_start_reg_reg ( IN SI ) ( OUT Q )
chip_core_inst/xxx/u_xxx_ppp_u_xxx_pppctrl_start_r_reg_reg ( IN D ) ( OUT Q )
chip_core_inst/xxx/u_xxx_ppp_u_xxx_pppctrl_xxx2ppp_start_reg ( IN D ) ( OUT Q )
chip_core_inst/xxx/u_xxx_ppp_ahb2ecc_alg_start_reg_reg ( IN D ) ( OUT Q )
chip_core_inst/xxx/u_xxx_ppp_ahb2ecc_alg_start_reg1_reg ( IN D ) ( OUT Q )
chip_core_inst/xxx/u_xxx_ppp_ahb2ecc_alg_start_reg2_reg ( IN D ) ( OUT Q )
+ ORDERED chip_core_inst/xxx/u_xxx_core_u_xxx_abcde_lsfr3_reg_reg_12_ ( IN SI ) ( OUT QN )
，用Tmax读进来看起来没报错，不过还是担心，请教一下各位这样的scan chain可以吗?允许有INV在里面吗？
自己RE
dc插得没啥不放心的吧
只要formal能过就不影响你芯片的功能
没问题