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Comp.Arch.FPGA | Xilinx Spartan 3 DCM/DFS
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Xilinx Spartan 3 DCM/DFS - Tony C - 2004-08-27 15:05:00
I noticed that for Spartan 3 the DCM status does not define bit 2 any more. In Virtex II it meant that the DFS was stopped. Does this mean the DFS never stops? I want to use DFS mode (no CLKFB). How do I know if I need to reset the DCM? Thanks, Tony
Re: Xilinx Spartan 3 DCM/DFS - Steven K. Knapp - 2004-08-27 15:46:00
"Tony C" <t...@quantum.com> wrote in message news:9...@posting.google.com... > I noticed that for Spartan 3 the DCM status does not define bit 2 any > more. In Virtex II it meant that the DFS was stopped. Does this mean > the DFS never stops? I want to use DFS mode (no CLKFB). How do I know > if I need to reset the DCM? STATUS[2] is still the "CLKFX or CLKFX180 Output Stopped Indicator", as shown in XAPP462. http://www.xilinx.com/bvdocs/appnotes/xapp462.pdf I see, however, that it's missing from the latest data sheet! I'll file a bug report. --------------------------------- Steven K. Knapp Applications Manager, Xilinx Inc. General Products Division Spartan-3/II/IIE FPGAs http://www.xilinx.com/spartan3 --------------------------------- Spartan-3: Make it Your ASIC______________________________
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