From: Groepaz (groepaz_at_gmx.net)
Date: 2002-12-10 08:45:22
On Tuesday 10 December 2002 05:42, ncoplin@orbeng.com wrote:
> >>Seems most new LSI technology is going to 3.3V designs (eg CPLDs etc).
>
> Most
>
> >>are input tolerant for 5V, but how does one interface their outputs? Does
>
> a
>
> >>simple pull-up resistor to 5V do the trick?
> >
> >Why do you need to? Doesn't the 6502 see >=2.6V as a 1 and <=2.4V as 0?
>
> Hi Ray,
>
> I suppose I don't know enough about the technology to know if 3.3V Vcc
> means "1" are 3.3V or whether it drops due to loading on the pin....
afaik all 3.3v is cmos so you arent supposed to put load on the pin at ALL ?
:o) (and a pullup to 5v on a 3.3v output is a BAD idea...think about it :=P)
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