Hi,
In the 750GX data sheet (750GX_ds2-17-05.pdf), page 45 has Table 5-1
that describes the PLL range field. It goes something like this:
PLL_RNG range
00 600 - 900
01 900 - 1000
10 500 - 600
Anyone have any thoughts as to what the correct values are for 600 and 900?
I think I have this working. I was setting the range to 1 for all
frequencies because I did:
if(freq<600)
instead of
if(freq<600000)
when building my frequency table.
This cpufreq stuff definitely messes up the repeatability of my
bogomazes value.
kevin
P.S.: I'd be interested in various theories as to what this does?
P.P.S.: On page 341 of the 750GX user manual It says:
"Turning the non selected PLL off results in a modest power savings ..."
Regarding what goes on in idle_6xx.S, wouldn't this likely save more
power than switching to a lower frequency (to clock mostly nothing since
the processor is going into doze or nap)?
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