Hi,
On the Gumstix-list we have had a discussion about which OPP modes were to be considered overdrive modes for the different OMAP35xx versions?
For the 600MHz version OPP5 is the highest supported mode.
For the 720MHz version OPP6 have been introduced to allow 720MHz operation.
In the datasheet it's stated that OPP5 and OPP6 are both considered overdrive modes (and both running 1.35V) - It's unfortunately not 100% clear if OPP5 is considered an overdrive mode for the 720MHz version as well - or if this only applies for the 600MHz version?
From the datasheet:
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To avoid significant device degradation for commercial temperature
OMAP3530/OMAP3525 devices
(0°C < Tj < 90°C), the device power-on hours (POH) must be limited to one of the following:
* 100K total POH when operating across all OPPs and keeping the time spent at OPP5-OPP6 to less than 23K POH.
* 50K total POH when operating at OPP5 - OPP6.
* 44K total POH with no restrictions to the proportion of these POH at operating points OPP1 - OPP6.
To avoid significant device degradation for extended temperature OMAP3530A/OMAP3525A devices
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Does this basically mean that running the 720MHz version at 600MHz is as "hard" for it as running at 720MHz? This would kind of suggest that the aging is mainly controlled by the operating voltage and not by the frequency - Would this be a correct conclusion? Or should the table be read in a way that it applies OPP5 for the 600MHz and OPP6 for the 720MHz version?
Best regards and thanks - Hoping that somebody can clarify
Søren