xilinx的pll问题，看看这个问题怎么解决

574920045 · 发表于 2014-4-26 18:12:40

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ERROR

lace:1113 - Unroutable Placement! A BUFIO / PLL clock component pair have been found that are not placed at a
routable BUFIO / PLL site pair. The BUFIO component <SP6_BUFIO2_INSERT_PLL1_ML_BUFIO2_1> is placed at site
<BUFIO2_X3Y7>. The corresponding PLL component <u_pll1/pll_base_inst/PLL_ADV> is placed at site <

LL_ADV_X0Y1>. The
BUFIO can use the fast path between the BUFIO and the PLL if the BUFIO is in TOPor BOTTOM edge and both the BUFIO &
PLL are placed in the same half of the device (TOP or BOTTOM). This placement is UNROUTABLE in PAR and therefore,
this error condition should be fixed in your design. You may use the CLOCK_DEDICATED_ROUTE constraint in the .ucf
file to demote this message to a WARNING in order to generate an NCD file. This NCD file can then be used in FPGA
Editor to debug the problem. A list of all the COMP.PINS used in this clock placement rule is listed below. These
examples can be used directly in the .ucf file to demote this ERROR to a WARNING.
< PIN "u_pll1/pll_base_inst/PLL_ADV.CLKIN1" CLOCK_DEDICATED_ROUTE = FALSE; >
ERROR

ack:1654 - The timing-driven placement phase encountered an error.

jxbuaaee · 发表于 2014-4-30 16:08:46

log不是写了吗，直接ucf里添加括号里的约束
These
examples can be used directly in the .ucf file to demote this ERROR to a WARNING.
< PIN "u_pll1/pll_base_inst/PLL_ADV.CLKIN1" CLOCK_DEDICATED_ROUTE = FALSE; >

ccofcy · 发表于 2014-4-30 16:47:04

可以按log里面这个建议把error变成warning，让程序跑下去，然后用FPGA Editor来找问题，不过应该还是得想办法解决的，试试换一下输入管脚？或者如果对PLL做了区域约束把约束去掉试试？

haitaox · 发表于 2014-4-30 18:18:04

CLK的输入位置吧，和PLL距离太远了。
你指定了PLL的位置了？

574920045 · 发表于 2014-5-2 15:53:38

回复 4# haitaox

这个制定pll的位置不会用啊！怎么指定啊！

haitaox · 发表于 2014-5-3 22:02:34

你用了多少个pll

jxbuaaee · 发表于 2014-5-4 15:13:45

这个应该是pll的一个输出直接输出到pad上，所以会出这样的错误。

emicleung · 发表于 2014-5-4 16:54:04

不知道什么问题，鼎一个先。。。

[求助] xilinx的pll问题，看看这个问题怎么解决

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