如何在ICC中加入IO和POWER PAD? 在线等！

HP_ccyz2012 · 发表于 2012-9-22 09:42:16

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本帖最后由 HP_ccyz2012 于 2012-9-22 09:56 编辑

各位大侠，小弟在学习ICC，最近遇到一个问题，IO pad我通过在TOP中例化得到了，然后生成的网表里也有，如下：
  PI UPI_RST ( .PAD(RST), .C(PAD_RST) );
  PI UPI_CLK ( .PAD(CLK), .C(PAD_CLK) );
  PI UPI_SCL ( .PAD(SCL), .C(PAD_SCL) );
但是POWER PAD是怎么加进去的？我是直接手动写在网表中的，如下：
  PVDD1 UVDD1 ( .VDD(VDD) );
  PVSS1 UVSS1 ( .VSS(VSS) );
  PVDD2 UVDD2 ();
  PVSS2 UVSS2 ();
我用自己的设计按照lab的操作顺序，执行到
derive_pg_connection -power_net VDD  -power_pin VDD  -ground_net VSS  -ground_pin VSS
时报如下错误：
Error: Net VDD is not a power net. (MWUI-714)
derive pg failed
然后我打入：create_net -power VDD
Error: Net 'VDD' already exists in design 'I2C_Top'.  (UIED-13)
0
还有就是上面的网表中添加PAD的方法是我在网上看到的，不知道对不对，初学者求高手指点，非常感谢！！

HP_ccyz2012 · 发表于 2012-9-22 11:40:54

没人回呀，自己顶一个

HP_ccyz2012 · 发表于 2012-9-24 10:16:22

还是没人帮忙呀。。。。

fhy420462303 · 发表于 2012-9-26 13:46:46

解决么我也遇到这个问题了？？？？解决了给我说下思路！！

prolity · 发表于 2012-10-21 14:23:38

在你的网表里，把
PVDD1 UVDD1 ( .VDD(VDD) );
PVSS1 UVSS1 ( .VSS(VSS) );
都删掉，重新写一个PAD的约束文件，再derive_pg_connection -power_net VDD -power_pin VDD -ground_net VSS -ground_pin VSS

HP_ccyz2012 · 发表于 2012-10-22 09:34:34

回复 5# prolity

PAD约束文件怎么写的？谢谢！

prolity · 发表于 2012-10-23 23:42:31

回复 6# HP_ccyz2012

# Create corners and P/G pads
create_cell {cornerll cornerlr cornerul cornerur} PCORNER
create_cell {vss1left vss1right vss1top vss1bottom} PVSS1
create_cell {vdd1left vdd1right vdd1top vdd1bottom} PVDD1
create_cell {vss2left vss2right vss2top vss2bottom} PVSS2
create_cell {vdd2left vdd2right vdd2top vdd2bottom} PVDD2
# Define corner pad locations
set_pad_physical_constraints -pad_name "cornerul" -side 1
set_pad_physical_constraints -pad_name "cornerur" -side 2
set_pad_physical_constraints -pad_name "cornerlr" -side 3
set_pad_physical_constraints -pad_name "cornerll" -side 4
# Define signal and PG pad locations
# Left side
set_pad_physical_constraints -pad_name "pad_t2ex" -side 1 -order 1
set_pad_physical_constraints -pad_name "p2_0_o" -side 1 -order 2
set_pad_physical_constraints -pad_name "p2_1_o" -side 1 -order 3
set_pad_physical_constraints -pad_name "p2_2_o" -side 1 -order 4
set_pad_physical_constraints -pad_name "p2_3_o" -side 1 -order 5
set_pad_physical_constraints -pad_name "p2_4_o" -side 1 -order 6
set_pad_physical_constraints -pad_name "p2_5_o" -side 1 -order 7
set_pad_physical_constraints -pad_name "p2_6_o" -side 1 -order 8
set_pad_physical_constraints -pad_name "p2_7_o" -side 1 -order 9
set_pad_physical_constraints -pad_name "vdd2left" -side 1 -order 10
set_pad_physical_constraints -pad_name "vdd1left" -side 1 -order 11
set_pad_physical_constraints -pad_name "vss1left" -side 1 -order 12
set_pad_physical_constraints -pad_name "vss2left" -side 1 -order 13
set_pad_physical_constraints -pad_name "pad_rxd" -side 1 -order 14
set_pad_physical_constraints -pad_name "pad_txd" -side 1 -order 15
set_pad_physical_constraints -pad_name "p3_0_i" -side 1 -order 16
set_pad_physical_constraints -pad_name "p3_1_i" -side 1 -order 17
set_pad_physical_constraints -pad_name "p3_2_i" -side 1 -order 18
set_pad_physical_constraints -pad_name "p3_3_i" -side 1 -order 19
set_pad_physical_constraints -pad_name "p3_4_i" -side 1 -order 20
set_pad_physical_constraints -pad_name "p3_5_i" -side 1 -order 21
set_pad_physical_constraints -pad_name "p3_6_i" -side 1 -order 22
set_pad_physical_constraints -pad_name "p3_7_i" -side 1 -order 23

# Top side
set_pad_physical_constraints -pad_name "p0_7_i" -side 2 -order 1
set_pad_physical_constraints -pad_name "p0_6_i" -side 2 -order 2
set_pad_physical_constraints -pad_name "p0_5_i" -side 2 -order 3
set_pad_physical_constraints -pad_name "p0_4_i" -side 2 -order 4
set_pad_physical_constraints -pad_name "p0_3_i" -side 2 -order 5
set_pad_physical_constraints -pad_name "p0_2_i" -side 2 -order 6
set_pad_physical_constraints -pad_name "p0_1_i" -side 2 -order 7
set_pad_physical_constraints -pad_name "p0_0_i" -side 2 -order 8
set_pad_physical_constraints -pad_name "pad_int0" -side 2 -order 9
set_pad_physical_constraints -pad_name "vdd2top" -side 2 -order 10
set_pad_physical_constraints -pad_name "vdd1top" -side 2 -order 11
set_pad_physical_constraints -pad_name "vss1top" -side 2 -order 12
set_pad_physical_constraints -pad_name "vss2top" -side 2 -order 13
set_pad_physical_constraints -pad_name "pad_int1" -side 2 -order 14
set_pad_physical_constraints -pad_name "p3_7_o" -side 2 -order 15
set_pad_physical_constraints -pad_name "p3_6_o" -side 2 -order 16
set_pad_physical_constraints -pad_name "p3_5_o" -side 2 -order 17
set_pad_physical_constraints -pad_name "p3_4_o" -side 2 -order 18
set_pad_physical_constraints -pad_name "p3_3_o" -side 2 -order 19
set_pad_physical_constraints -pad_name "p3_2_o" -side 2 -order 20
set_pad_physical_constraints -pad_name "p3_1_o" -side 2 -order 21
set_pad_physical_constraints -pad_name "p3_0_o" -side 2 -order 22

# Right side
set_pad_physical_constraints -pad_name "p1_7_i" -side 3 -order 1
set_pad_physical_constraints -pad_name "p1_6_i" -side 3 -order 2
set_pad_physical_constraints -pad_name "p1_5_i" -side 3 -order 3
set_pad_physical_constraints -pad_name "p1_4_i" -side 3 -order 4
set_pad_physical_constraints -pad_name "p1_3_i" -side 3 -order 5
set_pad_physical_constraints -pad_name "p1_2_i" -side 3 -order 6
set_pad_physical_constraints -pad_name "p1_1_i" -side 3 -order 7
set_pad_physical_constraints -pad_name "p1_0_i" -side 3 -order 8
set_pad_physical_constraints -pad_name "pad_t2" -side 3 -order 9
set_pad_physical_constraints -pad_name "vdd2right" -side 3 -order 10
set_pad_physical_constraints -pad_name "vdd1right" -side 3 -order 11
set_pad_physical_constraints -pad_name "vss1right" -side 3 -order 12
set_pad_physical_constraints -pad_name "vss2right" -side 3 -order 13
set_pad_physical_constraints -pad_name "pad_clk" -side 3 -order 14
set_pad_physical_constraints -pad_name "pad_rst" -side 3 -order 15
set_pad_physical_constraints -pad_name "p0_7_o" -side 3 -order 16
set_pad_physical_constraints -pad_name "p0_6_o" -side 3 -order 17
set_pad_physical_constraints -pad_name "p0_5_o" -side 3 -order 18
set_pad_physical_constraints -pad_name "p0_4_o" -side 3 -order 19
set_pad_physical_constraints -pad_name "p0_3_o" -side 3 -order 20
set_pad_physical_constraints -pad_name "p0_2_o" -side 3 -order 21
set_pad_physical_constraints -pad_name "p0_1_o" -side 3 -order 22
set_pad_physical_constraints -pad_name "p0_0_o" -side 3 -order 23

# Bottom side
set_pad_physical_constraints -pad_name "p1_0_o" -side 4 -order 1
set_pad_physical_constraints -pad_name "p1_1_o" -side 4 -order 2
set_pad_physical_constraints -pad_name "p1_2_o" -side 4 -order 3
set_pad_physical_constraints -pad_name "p1_3_o" -side 4 -order 4
set_pad_physical_constraints -pad_name "p1_4_o" -side 4 -order 5
set_pad_physical_constraints -pad_name "p1_5_o" -side 4 -order 6
set_pad_physical_constraints -pad_name "p1_6_o" -side 4 -order 7
set_pad_physical_constraints -pad_name "p1_7_o" -side 4 -order 8
set_pad_physical_constraints -pad_name "pad_t0" -side 4 -order 9
set_pad_physical_constraints -pad_name "vdd2bottom" -side 4 -order 10
set_pad_physical_constraints -pad_name "vdd1bottom" -side 4 -order 11
set_pad_physical_constraints -pad_name "vss1bottom" -side 4 -order 12
set_pad_physical_constraints -pad_name "vss2bottom" -side 4 -order 13
set_pad_physical_constraints -pad_name "pad_t1" -side 4 -order 14
set_pad_physical_constraints -pad_name "p2_0_i" -side 4 -order 15
set_pad_physical_constraints -pad_name "p2_1_i" -side 4 -order 16
set_pad_physical_constraints -pad_name "p2_2_i" -side 4 -order 17
set_pad_physical_constraints -pad_name "p2_3_i" -side 4 -order 18
set_pad_physical_constraints -pad_name "p2_4_i" -side 4 -order 19
set_pad_physical_constraints -pad_name "p2_5_i" -side 4 -order 20
set_pad_physical_constraints -pad_name "p2_6_i" -side 4 -order 21
set_pad_physical_constraints -pad_name "p2_7_i" -side 4 -order 22
仅供参考。你试试看行不行哈。

liuada001 · 发表于 2012-10-23 23:58:59

回复 7# prolity

想请问，ICC里究竟是如何识别power 和 ground的，如果是通过IO类型识别，那么在网表里声明应该就可以了，向你刚刚那种通过命令添加IO的方式，也只能通过IO类型来判断啊？不了解，求指教。

舟syu · 发表于 2012-10-24 08:23:56

同为新手，来讨论讨论。。
现在做的流程里面，IO和PAD都没有写在网表中，而是自己创建之后place的。

另外我觉得网标里声明POWER和GROUND有点不对劲，网表里没有PIN和PORT的物理位置呀。
我查了下tsmc给的lef文件里，电源pin，port带有 USE POWER 的记述，·mw 的database应该是基于lef创建的吧

HP_ccyz2012 · 发表于 2012-10-25 15:42:41

回复 7# prolity

谢谢！
我把网表里的port去掉了，按照上面你说的这样做过一次，但是还是没有出现像例子里那样的电源和地环，不知道什么原因，求高手赐教！

[求助] 如何在ICC中加入IO和POWER PAD? 在线等！

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