DC set_max_transition 违例,需不需要修复
时间:10-02
整理:3721RD
点击:
其中一段report是
max_transition
RequiredActual
NetTransitionTransitionSlack
-----------------------------------------------------------------
aes_top_inst/n134 (dont_touch)1.001.03-0.03(VIOLATED)
PIN :aes_top_inst/wb_ack_o_reg/D1.001.03-0.03 (VIOLATED)
PIN :aes_top_inst/text_out_reg[102]/RN1.001.03-0.03 (VIOLATED)
PIN :aes_top_inst/text_out_reg[127]/RN1.001.03-0.03 (VIOLATED)
PIN :aes_top_inst/text_out_reg[126]/RN1.001.03-0.03 (VIOLATED)
PIN :aes_top_inst/text_out_reg[125]/RN1.001.03-0.03 (VIOLATED)
PIN :aes_top_inst/text_out_reg[124]/RN1.001.03-0.03 (VIOLATED)
PIN :aes_top_inst/text_out_reg[123]/RN1.001.03-0.03 (VIOLATED)
PIN :aes_top_inst/text_out_reg[122]/RN1.001.03-0.03 (VIOLATED)
PIN :aes_top_inst/text_out_reg[121]/RN1.001.03-0.03 (VIOLATED)
PIN :aes_top_inst/text_out_reg[120]/RN1.001.03-0.03 (VIOLATED)
PIN :aes_top_inst/text_out_reg[119]/RN1.001.03-0.03 (VIOLATED)
PIN :aes_top_inst/text_out_reg[118]/RN1.001.03-0.03 (VIOLATED)
PIN :aes_top_inst/text_out_reg[117]/RN1.001.03-0.03 (VIOLATED)
PIN :aes_top_inst/text_out_reg[116]/RN1.001.03-0.03 (VIOLATED)
PIN :aes_top_inst/text_out_reg[115]/RN1.001.03-0.03 (VIOLATED)
PIN :aes_top_inst/text_out_reg[114]/RN1.001.03-0.03 (VIOLATED)
PIN :aes_top_inst/text_out_reg[113]/RN1.001.03-0.03 (VIOLATED)
PIN :aes_top_inst/text_out_reg[112]/RN1.001.03-0.03 (VIOLATED)
PIN :aes_top_inst/text_out_reg[111]/RN1.001.03-0.03 (VIOLATED)
max_transition
RequiredActual
NetTransitionTransitionSlack
-----------------------------------------------------------------
aes_top_inst/n134 (dont_touch)1.001.03-0.03(VIOLATED)
PIN :aes_top_inst/wb_ack_o_reg/D1.001.03-0.03 (VIOLATED)
PIN :aes_top_inst/text_out_reg[102]/RN1.001.03-0.03 (VIOLATED)
PIN :aes_top_inst/text_out_reg[127]/RN1.001.03-0.03 (VIOLATED)
PIN :aes_top_inst/text_out_reg[126]/RN1.001.03-0.03 (VIOLATED)
PIN :aes_top_inst/text_out_reg[125]/RN1.001.03-0.03 (VIOLATED)
PIN :aes_top_inst/text_out_reg[124]/RN1.001.03-0.03 (VIOLATED)
PIN :aes_top_inst/text_out_reg[123]/RN1.001.03-0.03 (VIOLATED)
PIN :aes_top_inst/text_out_reg[122]/RN1.001.03-0.03 (VIOLATED)
PIN :aes_top_inst/text_out_reg[121]/RN1.001.03-0.03 (VIOLATED)
PIN :aes_top_inst/text_out_reg[120]/RN1.001.03-0.03 (VIOLATED)
PIN :aes_top_inst/text_out_reg[119]/RN1.001.03-0.03 (VIOLATED)
PIN :aes_top_inst/text_out_reg[118]/RN1.001.03-0.03 (VIOLATED)
PIN :aes_top_inst/text_out_reg[117]/RN1.001.03-0.03 (VIOLATED)
PIN :aes_top_inst/text_out_reg[116]/RN1.001.03-0.03 (VIOLATED)
PIN :aes_top_inst/text_out_reg[115]/RN1.001.03-0.03 (VIOLATED)
PIN :aes_top_inst/text_out_reg[114]/RN1.001.03-0.03 (VIOLATED)
PIN :aes_top_inst/text_out_reg[113]/RN1.001.03-0.03 (VIOLATED)
PIN :aes_top_inst/text_out_reg[112]/RN1.001.03-0.03 (VIOLATED)
PIN :aes_top_inst/text_out_reg[111]/RN1.001.03-0.03 (VIOLATED)
如果需要修复如何修
求大神帮助我,小弟不懂
看报告,都是复位信号违例,是不是你将复位信号设置了set_dont_touch_network。(对于high-fanout net一般都会这么做的,在PR时去优化)
如果是这样,DC当然不会去修复位信号的任何违例,如max-fanout 、max-transition。你也不必在乎,因为是你让DC不去优化的,你知道这个问题会在PR解决。
想请教一下,怎么看出来是复位信号的问题?
接到了reg /RN端。你是hit的?
恩恩,我才刚接触后端,给学校丢人了。
Also HIT
呵呵 有啥丢人不丢人啊咱们hit 的本来后端就没咋学习,也就肖老师那边会接触些,你是那边的?
我是大王老师那边的,学长也是微电子的吗?已经毕业了吧
对于clock net上的transition必须要修,而且应该在修setup hold之前修掉,数据线上的transition只要不是违反太大,基本没什么问题,控制在10%以内
受教了受教了
不是所有的transition都要修的,因为有些约束是我们为了严格时序自己加的。要自行判断。加我Q每天晚上11点答疑
请问您的QQ号码是多少?有问题请教,谢谢!