选项1 - 正如Eilert所建议的那样。
选项2-如果需要,Clk freq更小 - 使用DCM生成多个of3的高速clk(比如30次 - 它将取决于DCM的输入Clk频率和频率范围)并使用计数器电路。
选项3 - 您正在使用哪个设备Spartan3 / Spartan3E / Spartan3A .......您刚才提到了您要使用的软件包
(我想使用只有2个DCMS的144tqg包)?
在同一个软件包中,您可以找到其他更高级别的设备,它具有4个DCM。
例如,XC3s250E在具有4个DCM的TQ144封装中是可用的。
山塔努
Shantanu Sarkarhttp://www.linkedin.com/pub/shantanu-sarkar/0/33a/335
以上来自于谷歌翻译
以下为原文
Option 1 - As suggested by Eilert.
Option 2- If required Clk freq is less - Use DCM to generate a high speed clk in multiple of 3 (say 30 Times - It will depend on the Input Clk Freq and freq range of the DCM) and use a a counter circuit.
Option 3 - Which device you are using Spartan3 / Spartan3E / Spartan3A ....... you have only mentioned about the package you want to use
(I want to use the 144tqg package which has only 2 DCMS)?
In the same package you can find out some other higher device which is having 4 DCM. e.g XC3s250E is avialable in TQ144 Package which has 4 DCM.
Shantanu
Shantanu Sarkar
http://www.linkedin.com/pub/shantanu-sarkar/0/33a/335
选项1 - 正如Eilert所建议的那样。
选项2-如果需要,Clk freq更小 - 使用DCM生成多个of3的高速clk(比如30次 - 它将取决于DCM的输入Clk频率和频率范围)并使用计数器电路。
选项3 - 您正在使用哪个设备Spartan3 / Spartan3E / Spartan3A .......您刚才提到了您要使用的软件包
(我想使用只有2个DCMS的144tqg包)?
在同一个软件包中,您可以找到其他更高级别的设备,它具有4个DCM。
例如,XC3s250E在具有4个DCM的TQ144封装中是可用的。
山塔努
Shantanu Sarkarhttp://www.linkedin.com/pub/shantanu-sarkar/0/33a/335
以上来自于谷歌翻译
以下为原文
Option 1 - As suggested by Eilert.
Option 2- If required Clk freq is less - Use DCM to generate a high speed clk in multiple of 3 (say 30 Times - It will depend on the Input Clk Freq and freq range of the DCM) and use a a counter circuit.
Option 3 - Which device you are using Spartan3 / Spartan3E / Spartan3A ....... you have only mentioned about the package you want to use
(I want to use the 144tqg package which has only 2 DCMS)?
In the same package you can find out some other higher device which is having 4 DCM. e.g XC3s250E is avialable in TQ144 Package which has 4 DCM.
Shantanu
Shantanu Sarkar
http://www.linkedin.com/pub/shantanu-sarkar/0/33a/335
举报