icc请进,请教report_timing报告怎么读
时间:10-02
整理:3721RD
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我在执行了在report_timing之后得到的报告如下:PointIncrPath
-----------------------------------------------------------
clock CLK (rise edge)0.000.00
clock network delay (ideal)0.000.00
input external delay5.005.00 r
data[1] (in)0.005.00 r
U34/ZN (INHSV0SR)0.02 *5.02 f
U31/ZN (OAOAOAI211111HSV0)0.38 *5.40 r
U30/Z (AND2HSV0RD)0.17 *5.58 r
obit[0] (out)0.00 *5.58 r
data arrival time5.58
clock CLK (rise edge)20.0020.00
clock network delay (ideal)0.0020.00
output external delay-5.0015.00
data required time15.00
-----------------------------------------------------------
data required time15.00
data arrival time-5.58
-----------------------------------------------------------
slack (MET)9.42
一些数字后面跟的r,一些数字后面跟的是f,他们到底是代表什么意思啊?
-----------------------------------------------------------
clock CLK (rise edge)0.000.00
clock network delay (ideal)0.000.00
input external delay5.005.00 r
data[1] (in)0.005.00 r
U34/ZN (INHSV0SR)0.02 *5.02 f
U31/ZN (OAOAOAI211111HSV0)0.38 *5.40 r
U30/Z (AND2HSV0RD)0.17 *5.58 r
obit[0] (out)0.00 *5.58 r
data arrival time5.58
clock CLK (rise edge)20.0020.00
clock network delay (ideal)0.0020.00
output external delay-5.0015.00
data required time15.00
-----------------------------------------------------------
data required time15.00
data arrival time-5.58
-----------------------------------------------------------
slack (MET)9.42
一些数字后面跟的r,一些数字后面跟的是f,他们到底是代表什么意思啊?
r:rise
f:fall
r是指相对时钟的上升沿计算的延时的吗?f指相对于下降沿计算延时?
对的
input external delay5.005.00 r
data[1] (in)0.005.00 r
U34/ZN (INHSV0SR)0.02 *5.02 f为什么开始是相对于rise的,后面就是相对于fall的?这个事怎么计算的?
U34/ZN (INHSV0SR)是个反相器?信号上升沿进入,下降沿出来呗。
哦,原来这样确实INHSV0SR是个反相器,谢谢您!