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请教CCT布线器的警告处理方法!
各位大虾,小弟学习CCT布线器的使用时,出现了一个警告,不知该如何处理,还望高手赐教!
内容如下:
## The following messages were generated by Allegro PCB Router at invocation time:
-----------------------------------------------------------------
# <<WARNING:>> Net 3V3 is defined as a signal net and contains 269 pins.
# This is more pins than most signal nets contain.
# Please verify whether net 3V3 should be a signal net or a power net.
# Note that a signal net will be routed as starburst or daisy chain.
-----------------------------------------------------------------
# <<WARNING:>> Net GND is defined as a signal net and contains 410 pins.
# This is more pins than most signal nets contain.
# Please verify whether net GND should be a signal net or a power net.
# Note that a signal net will be routed as starburst or daisy chain.
-----------------------------------------------------------------
# <<WARNING:>> Net 1V6 is defined as a signal net and contains 127 pins.
# This is more pins than most signal nets contain.
# Please verify whether net 1V6 should be a signal net or a power net.
# Note that a signal net will be routed as starburst or daisy chain.
-----------------------------------------------------------------
看了一些帖子,方法是要把电源的网络一定要定义成电源层,这样电源的网络就系统默认为power pin,警告就解除了,但是,我电源的网络有好几个,而电源层只有一个,该怎么定义呢?!
好难呀,还望知道的兄弟给解答一下!小弟不胜感激
再顶一下,每人知道吗!?
一天顶两次
我也在学习中,你先在allegro软件里面,做电源层分割,也就是几个电源合用一层,再试试看看呢
兄弟,电源分割我知道,我是说如何把我的所有的电源网络倒入pcb后,系统默认为power pin,
比如说我有4个电源网络,1.2v,1.6v,3.3v,5v,这几个电源网络倒入pcb后,系统默认是signal pin,就会出现以上的警告。
比如我有一个电源层,我把这个电源层命名为1.2v,那1.2v的网络就默认为power pin,1.2v的警告就没有了,但是
1.6v,3.3v,5v的警告依然存在。因为我没有那么多电源层把所有的电源全部命名。
当然,我的目的是消除警告,如果有其他更好的方法,还请兄弟相告!
谢谢
Cadence Allegro 培训套装,视频教学,直观易学
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