AR# 22615: 7.1isp2 Timing Analyzer/trce/speed file - Spartan-3E Period Checks are updated for DCM
AR# 22615
7.1isp2 Timing Analyzer/trce/speed file - Spartan-3E Period Checks are updated for DCM
描述
Keywords: frequency
Urgency: Standard
General Description: When I look at my timing report, the DFS and DLL frequency buttons on the Spartan-3 DCM do not affect the CLKIN frequency and the overall performance of the DCM. Are the DFS and DLL frequency button suppose to do something?
解决方案
The Spartan-3E DCM autoranges the CLKIN frequency. Consequently, the DFS and DLL frequency buttons on the DCM are meaningless. The speed files are updated according to the data sheet specifications.