Ok,
I have now set the system clock to 24 MHz and it works fine. Thanks
for all help, now I am going to trim up the speed to see were the
limit is. But i still think it is strange that it can't run at
60MHz, it should according to the DS. In the real application were
running with a 20Mhz osc so I think the limit there would be 40 MHz.
Thanks for all help Dan.
/FM
--- In lpc2000@yahoogroups.com, "Dan Beadle" <dan.beadle@i...> wrote:
> It sure sounds like you have it configured correctly. I would try
going
> with the default speeds and see if you have any issues (12MHz).
If the
> symptom goes away, you know you are on the right track.
>
>
>
> Dan
>
>
>
> _____
>
> From: lpc2000@yahoogroups.com [mailto:lpc2000@yahoogroups.com] On
Behalf
> Of albin_martinsson
> Sent: Monday, June 27, 2005 11:50 PM
> To: lpc2000@yahoogroups.com
> Subject: [lpc2000] Re: Reading from flash
>
>
>
> Hi
> Thanks for the quick answer,
>
> the MAM is disabled,
> PLL is set to MUL with 4 (clock freq * (4+1))
> Im using the MCB2100 so the clock freq is 12 MHz and with the PLL
> the running speed is 60MHz.
>
> Do you think its better to slower down the PLL or should I
configure
> the MAM function?
>
> /FM
>
>
> --- In lpc2000@yahoogroups.com, "Dan Beadle" <dan.beadle@i...>
wrote:
> > The JTAG dump does not run at the same speed as the internal
FLASH.
> > (Generally slower). I would GUESS that you might have the MAM
set
> up
> > too fast or the PLL too fast. This could cause FLASH to read
back
> > incorrectly at execution time, but the slower JTAG dump would
read
> it
> > correctly.
> >
> >
> > Dan
> >
> >
> >
> >
> >
> > _____
> >
> > From: lpc2000@yahoogroups.com [mailto:lpc2000@yahoogroups.com]
On
> Behalf
> > Of albin_martinsson
> > Sent: Monday, June 27, 2005 11:29 PM
> > To: lpc2000@yahoogroups.com
> > Subject: [lpc2000] Reading from flash
> >
> >
> >
> > Hi
> >
> > Anyone knows why I get some bit-errors when I am reading from
the
> > flashmemory. In my program I store some data (texts and other
> > configurations) with the IAP routines. But if I compare the
> recently
> > written data from RAM with the programmed data from Flash there
> are
> > some bits that has changed, resulting in a checksum error for
the
> > data I have written to Flash. But! when i do a memory dump from
> the
> > flash memory with the LPC2100-program I always read the correct
> data.
> >
> > I read from Flash by pointing a byte pointer like this:
> >
> > tU8 *ptr;
> > flashaddress = 0x00020000;
> > ...
> > ptr = (tU8 *)flashaddress;
> >
> > When i turned off the MAM funktion the error reduced but there
are
> > still some errors.
> >
> > Can someone explain why this is so?
> >
> > B.R /Fredrik Martinsson
> >
> >
> >
> >
> >
> > _____
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