DCM and buffers

Jan 04, 2006 1 Replies

hi



I have another question about DCM's: If I use the design wizard to generate a vhdl file for a DCM the wizard uses all kinds of Buffers. For example it also uses a "BUFG" in the feedback loop. CLK0 -> BUFG -> CLKFB. Is that necessary? Do I have to use an IBUFG for the CLKIN of a DCM if nothing else is connected to that CLK signal? I still a beginner in vhdl so please bear with me. Thanks for all the help urban



Hello

Yes, it is. To CLKFB you can connect signals from BUFG or IBUFG.

Yes, you have.

Why? - it's good question for homework.

If you looking for advice here, be more specific:

- What tool you use?

- What chip-device, you want to configure?

good luck.

Jerzy Gbur

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