Herbert Graf wrote:
> The ENC28J60 is a fixed function device, aside from say grounding an
> output set at one I don't really see how it could consum more power or
> less while operating (ignoring possible sleep modes). It's frequency is
> fixed (25MHz), it's IO is fixed, so there shouldn't be too much power
> fluctuation while operating.

I expect large parts of the chip aren't doing much when no packets are
coming and going.  The chip has 8 Kbytes of static RAM.  This probably draws
significantly more power when being accessed than when just sitting there.

In any case, the data sheet says 250mA, so anything less than that is a nice
freeby but you can't count on it.  It may be quite possible that some
devices at some temperatures at some level of inactivity draw only 150mA,
but so what?  You still can't design around that number, and it's otherwise
clearly within spec.  I fail to see what the issue is.


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