Re: Will CompactFlash work with 3v?

From: Ben Nguyen (benn686_at_hotmail.com)
Date: 02/13/04 

Date: 12 Feb 2004 18:19:56 -0800

The CF adapter is for an embedded project (not going into a PC).
I know a CF card will work with 5v and 3.3v, but my situation is such
that the databus is 3.3v but my power supply to CF adapter is only 3v.
So all I was wondering was if the CF would work with only 3 volts power
applied to it.

The answer is YES! That worked fine.

The only problem is, that its a 4MB card formatted with
FAT12 and the code Ive inherited is for FAT16. I bought a USB CF Card
reader so that Windows XP/DOS could format it, but it also formats it to
FAT12. Is there any way to force a 4MB (currently FAT12) CF to FAT16. I now
its not as efficient, but it would make things much easier for development.

Ben

> > >>Huh? What are you talking about? The question is, "will a CF card work
> > >>with 5V supply". The answer is, that the CompactFlash specification
> > >>requires all CF cards to be capable of operation with either 3.3V or 5V
> > >>on the power rails. I don't understand your posting.
> > >>
> > >>If he has only 3.3V power, then how could his board be using 5V logic
> > >>levels?
>

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