Lpc2000

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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