第一部分是基本的timing path信息,包括path类型,analysis view,Slack等等信息 第二部分其实就是一个图形化计算slack的显示, 上面一条直线代表Data Arrival Time, 下面一条代表Data Require Time 第三部分是具体每个section内容, Data Path, Launch Clock P...
第一部分是基本的timing path信息,包括path类型,analysis view,Slack等等信息 第二部分其实就是一个图形化计算slack的显示, 上面一条直线代表Data Arrival Time, 下面一条代表Data Require Time 第三部分是具体每个section内容, Data Path, Launch Clock Path和Capture Clock Path就是三种path上的具体组成,分别对应着t...
第一部分是基本的timing path信息,包括path类型,analysis view,Slack等等信息 第二部分其实就是一个图形化计算slack的显示, 上面一条直线代表Data Arrival Time, 下面一条代表Data Require Time 第三部分是具体每个section内容, Data Path, Launch Clock Path和Capture Clock Path就是三种path上的具体组成,分别对应着t...
第一部分是基本的timing path信息,包括path类型,analysis view,Slack等等信息 第二部分其实就是一个图形化计算slack的显示, 上面一条直线代表Data Arrival Time, 下面一条代表Data Require Time 第三部分是具体每个section内容, Data Path, Launch Clock Path和Capture Clock Path就是三种path上的具体组成,分别对应着t...
Timing Slack = Required Arrival Time (用户指定的) - Arrival Time(实际抵达时间) 如果Timing Slack小于0,则说明信号来迟了,存在时序违例。其中 Arrival Time是在前向时序传递完成了计算。通常对于时序终点,Required Arrival Time(RAT)为时钟周期减去建立时间(Clock Period - Setup Time)。但是对于中间每一个时序节...
Slack: Difference between arrival and required time. Min slack/hold slack/min difference=AT-RT Max Slack or Setup slack or max difference=RT-AT. Reg2reg analysis: Timing path from launch flip-flop clock port to capture flip-flop d pin which includes two registers (flip-flops),...
Data Required Time - Data Arrival Time = Slack (8.333+7.773+9.817) - (8.263+8.302+10.368 ) = -1.01ns It's not doing that analysis nor reporting the "violation". I expect it to report the violation because the maximum external delay would cause the data to arriv...
At placement and optimization stage, PnR Tool tries to optimize data path so that data arrival time can be minimized and worst negative slack (WNS) and total negative slack (TNS) could be reduced. Placement is the process of finding a suitable physical location for each cell in the design....
·reports the total time taken to arrive the clock pin of FF1 minus the setup time of FF2. (ref fig just above timing report) Slack ·timing difference between required and arrival time i.e (RT-AT) Typical symbols which can be seen in PrimeTime report : ...
For bidirectional I/O, they are analyzed as inputs and outputs, so they usually have both set_input_delay and set_output_delay assignments. These sdc below in the project could be reason we got the huge negative slack. The tool analyze that the Data Arrival Path goes from clk_10...