I succeded !
It was the 3v3 supply and the fact i was sending 57h command instead of
D7h as was supposed to be for a slave device.
The resistor circuit i was using in the first place was not able to supply
enough current to the chip and as a result the chip was not starting.
Now i get the status byte as expected, let's see if the read/write will work :)

On Jan 20, 2008 6:22 PM, Dumitru Stama <spanac@gmail.com> wrote:
> Actually not :(
> I am trying to replace the 3.2v power supply for the dataflash with a 3v3
> regulator. I am soldering as we speak.
> Thank you for your suggestion
>
>
>
> On Jan 20, 2008 6:00 PM, John Coppens <john@jcoppens.com> wrote:
> > On Sun, 20 Jan 2008 17:00:33 +0200
> > "Dumitru Stama" <spanac@gmail.com> wrote:
> >
> > > I attached the connection i am using for the chip, i should also add i
> > > use 4.5v to power my circuit and ~3.2v (using a resistor circuit) to
> > > power the dataflash.
> >
> > Just off-hand. Does the 'resistor circuit' take into account the
> > increased power supply current when reading or at standby? I'd consider
> > something slightly more complex (maybe just 2 Si diodes in series, if the
> > 4.5 is stable.
> >
> > John
> > --
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