大家好。
我有一个我为KC705
开发板定制的设计。
我的设计100%工作。
但是我将这个基础设计提供给我的客户,他的客户也购买了KC705并且设备没有在他的
电路板上工作。
所以他们给我发了他们的电路板,我一直在比较它们 - 它们具有完全相同的配置。
经过多次故障排除后,我已经达到了这样的程度,即我所设置的MMCM中的一个正在通过衍生时钟,但是没有锁定他的电路板。
有关如何进一步排除故障的任何想法?
我已经尝试将复位反转到MMCM,我已经尝试将它们从上电设置为静态。
没有什么能让MMCM锁定在这一块板上,但它对我的锁定很好。
这是我的实例,所以你可以看到我为它设置的频率:
inst_MIG_CLK:K7_CLK_GEN端口映射(clk_in1_p => VID_CLK_P, - 200MHz P clk_in1_n => VID_CLK_N, - 200MHz N CLK_OUT1 => user_sysclk, - 333 MHz CLK_OUT2 => user_refclk, - 200 MHz MIG锁定参考=> locked_mig_clk -
-resetn =>'0');
P和N进入user_sma_clk P / N引脚K25和L25,FWIW。
如果有人有任何故障排除线索或之前已经解决了这个问题,请提前感谢。
再次 - 在一块板上工作,而不是在客户上工作。
哦,我尝试将MMCM移动到另一个实例并且每个标志都爆炸了。
还尝试将模块更改为同一个磁贴站点的PLL,它也做同样的事情......没有锁定。
以上来自于谷歌翻译
以下为原文
Hi, all.
I have a design that I've customized for the KC705 dev board. My design is working 100%. But I deliver this base design to my customer who also has purchased a KC705 and the desing is not working on his board.
So they sent me their board, and I have been comparing them side by side - they have the exact same configura
tion.
After much troubleshooting, I have gotten to the point where one of the MMCM's I desinged in is passing through the derived clocks, but is not locking on his board. Any ideas on how to further troubleshoot this? I have tried inverting resets to the MMCM, I have tried setting them static from power-up. Nothing gets the MMCM to lock on this one board, but it locks just fine on mine. Here is my instantiation, so you can see the frequencies I have set it up for:
inst_MIG_CLK: K7_CLK_GEN
port map
(
clk_in1_p => VID_CLK_P, --200MHz P
clk_in1_n => VID_CLK_N, --200MHz N
CLK_OUT1 => user_sysclk, --333 MHz
CLK_OUT2 => user_refclk, --200 MHz reference for MIG
locked => locked_mig_clk
--resetn => '0'
);
The P and N are coming in on the user_sma_clk P/N pins K25 and L25, FWIW.
thanks in advance if anyone has any troubleshooting clues or has solved this before. Again - works on one board, not on the customers. Oh, and I tried moving the MMCM to another instance and everythign blew up. Also tried changing the module to a PLL for the same tile site and it does the same thing....no lock.