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zubin_kumar31
Explorer
Explorer
3,538 Views
Registered: ‎08-23-2011

reg: DCM DRP and re configuring the DCM freq during runtime ...

hi,

 

i was using the xilinx V5 XC5VSX50T board and i had to change the DCM freq on the fly. i looked up online and the documentation said that we can use a drp module (dynamic reconfiguration port) to change the multiply/divide values of the DCM. 

 

i wanted to know if this DRP module is an IP core or a xilinx primitive? how can i instantiate it in my design? Do i have to add it via the IP wizard or some other way to incorporate it into my desgin? and is the DCM DRP the same as PLL? 

 

please do let me know. thanks in advance. 

 

Zubin.

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gszakacs
Instructor
Instructor
3,536 Views
Registered: ‎08-14-2007

The DRP is part of the DCM or PLL.  Normally if you use the clocking wizard, you would need to

specify that you want the signals for the DRP brought out to the design.  Using the DRP is not

very simple because the bits for each parameter are often scattered among many words at

the DRP interface.  When I have used it, I generally made clock wizards with complete settings

for each configuration I wanted, then read all the values from the DRP and stored them for

use when changing settings.

-- Gabor
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