RE: 3.3V interfacing to the CBM

ncoplin_at_orbeng.com
Date: 2002-12-10 05:42:39

>>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....

- Nick


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