APR名词解释——trip-point
时间：10-02
整理：3721RD
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请问各位trip-point指的是什么?
出处如下：
NAME
TIM-164(warning) The trip points for the library named %s differ from
those in the library named %s.
DESCRIPTION
This warning message occurs when twolibrarieswithdifferenttrip-
point values are being used.This may result in a loss of timing accu-
racy when cells from one library are connected to cellsoftheother
library.
The following shows an example of the warning message.
Warning:Thetrip points for the library named cmos_013_comb differ
from those in the library named cmos_013_fflop. (TIM-164)
出处如下：
NAME
TIM-164(warning) The trip points for the library named %s differ from
those in the library named %s.
DESCRIPTION
This warning message occurs when twolibrarieswithdifferenttrip-
point values are being used.This may result in a loss of timing accu-
racy when cells from one library are connected to cellsoftheother
library.
The following shows an example of the warning message.
Warning:Thetrip points for the library named cmos_013_comb differ
from those in the library named cmos_013_fflop. (TIM-164)
应该是触发沿的意思吧，是上升沿触发和下降沿触发的不同，我综合是也有这个warning
不好意思，将错了，trip point 是指跳变的是，是20%到80%还是10%到90%，RC slew trip points的不同会影响transition time的计算
学习了
有什么解决办法吗?还是不处理这个Warning也可以
自己构造个简单的netlist在pt里报下timing不就知道了.如果工具只是简单将读两个lib的timing然后凑在一起那就有问题了,如果是做些插值插之类的估算那估计还马马虎虎.想知道精确答案,拿几个cell跑下spice吧.
学习了~
fallrise 的threshold吧