Xilinx AC701 Si570, Programming

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AC701 Si570 Programming
For this example, Si570_0 will be reprogrammed from 156.25 to 200
MHz
– This requires use of the SiLabs Programmable Oscillator Calculator
To use the SiLabs calculator, the correct fXTAL value for each Si570
must be determined, using this equation:
For this equation,
– Fout = 156.25, the preprogrammed frequency of the Si570s on the AC701
We need to determine:
– RFREQ
– HSDIV
– N1
These can be found be reading back the registers on the Si570
Note: Presentation applies to the AC701