请教 +pulse_r/100 +pulse_e/100

meijingguoyu

请教 +pulse_r/100 +pulse_e/100 是什么意思啊，说是与固有延迟和传输延迟有关，那位大哥能做个关于这条命令的详细解释啊？
1. 该命令用在哪里，code？ DC ？ VCS ？
2. _r 和 _e 还有后面的数字各代表什么意思啊？
谢谢啦

down_load

看到过有人用在ius仿真，查过ncvlog，ncverilog，ncvhdl帮助，没发现这样的选项。感觉没啥用

meijingguoyu

哦，谢谢2L的答复～

niyifang

vcs的仿真选线，在后仿时，如果pulse的宽度很小，如小于器件本身的延时的话，会直接被仿真器屏蔽且不会有任何报警。
可以通过增加+pulse_e/100 +pulse_r/100的仿真选项，将这些很小的毛刺报出来。

The +pulse_e/number option’s number argument specifies a percentage of the module path delay. VCS replaces pulses whose widths that are narrower than the specified percentage of the delay with an X value pulse on the output or inout port and displays a warning message.

The +pulse_r/number option’s number argument also specifies a percentage of the module path delay. VCS filters out the pulses whose widths are narrower than the specified percentage of the delay. With these pulses there is no warning message; VCS simply ignores these pulses.

fmyanglee

so?
okay
I see
thanks

zillagod

回复 4# niyifang


   thanks for ur reply; it's useful.