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AR# 1293

XC5200: UserClk must be enabled in Makebits before CK_DIV will be used.


The CK_DIV symbol is used when you want to bring in an external
clock signal from off-chip. However, placing the symbol on
schematic alone will not tell the Xilinx tools that your design
is being clocked externally.


You also need to enable the user clock in MakeBits by typing:

prompt> makebits -f OscClk:UserClk <design_name>.lca
AR# 1293
日期 10/07/2008
状态 Archive
Type 综合文章