Re: [microblaze-uclinux] Clock Incongruity

[Paul Hartke <phartke@xxxxxxxxxxxx>]

Since this is a pretty board specific question, I'd ask this question to the
Nu-Horizons support folks that created the BSB files.  They should know
exactly how the clocking works.  The whole point of BSB is to abstract away
these sorts of details.

Paul

Quoting Abot Botbot <dejanigma@hotmail.com>:
> Hello Folks,
>
>    I have a question involving the final running clock frequency on the
> Microblaze. I am using a pretty strange platform, a Nu-Horizons S3-400.
> It
> has a 20 MHz crystal oscillator as its input clock. In EDK when I set up
> my
> hardware in BSB, one of the first things it asks is the Reference Clock
> Frequency. This pulldown has no option for a 20 Mhz clock input, in fact
> 40
> MHz is as low as it goes. Is this a design lmiting factor? Could this
> mean
> that the microblaze thinks its taking its 50 MHz clock input to get its
> 100
> MHz core clock, that it really is getting a 40 MHz clock? I will include
> my
> MSS and MHS files if they are of any concequence.
>
> Thanks,
> Andy
>
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