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Improve calculation of MMCM multiplier and divisor values #463

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rohitk-singh opened this issue Dec 28, 2018 · 1 comment
Open

Improve calculation of MMCM multiplier and divisor values #463

rohitk-singh opened this issue Dec 28, 2018 · 1 comment

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@rohitk-singh
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The current code calculation of multiplier and divisor values for 7-Series (i.e, with MMCM) is not robust, and can fail (for example when setting resolution to 800x600@75.00Hz).

We need to improve the code so the calculated multiplier and divisor values are such that VCO frequency falls in the allowed range of 600MHz-1200MHz.
@mithro
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mithro commented Jul 2, 2019

Rohit - see timvideos/litex-buildenv#157

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@mithro @rohitk-singh