Lpc2000

Em Ter 28 Fev 2006 00:12, Robert Adsett escreveu:
> At 02:37 PM 2/27/2006 +0100, Michal Krestan wrote:
> >   Em Seg 27 Fev 2006 09:05, Michal Krestan escreveu:
> >   > I need to help with programming LPC2106 via LPC2000 flash utility.
> >
> > I've got
> >
> >   > board with one LPC2106 connected via UART0 to COM1. P0.14 is pulled
> >   > low, power supply pins are in limits but I can't sucesfully connect
> >   > with flash utility. Always I get message "Cannot communicate with
> >   > test board".
> >
> > X1 and
> >
> >   > X2 pins are connected to 7.3728MHz resonator. If I measure data
> >
> > between PC
> >
> >   > and LPC2106 it has some response on flash utility requests, but no
> >   > success:-( I had several pcs of this hardware working, but this one
> >
> > doesn't
> >
> >   > work. I've changed LPC2106 with new one but still with the same
> >   > result. Does anybody have idea how to fix this problem?
> >
> >   I've tried to use 11.0592MHz crystal, but with same result:-(
>
> Well, it had to be checked.  Have you tried connecting with a
> terminal?  Scoped the lines?  Marginal transceivers and bad connections
> have been reported as causing problems.
>
> >   Maybe isnt the frequency of your crystal?
> >   The datasheet says the LPC2106 must have a crystal from 10 to 25MHz,
> > and maybe
> >   the Flash program expects at minimum a 10MHz crystal to program the
> > UART0 of
> >   the LPC.
>
> Actually the datasheet says the minimum frequency is 1MHz, but 10MHz is
> needed for serial ISP. Some sort of limitation on their autobaud routines
> maybe?
>
> Robert
>
> " 'Freedom' has no meaning of itself.  There are always restrictions,   be
> they legal, genetic, or physical.  If you don't believe me, try to chew a
> radio signal. "  -- Kelvin Throop, III
> http://www.aeolusdevelopment.com/
>
Sorry if this messages dont help, but I am really happy, because the first 
board I made (entirelly), solded (by hand, with iron solder) worked just 
fine, the ISP worked fine from the first time. Everybody here (in Brasil) is 
playing the carnival and I here working, but I am happy too. I used a 10MHz 
crystal, and had no problemas with ISP. I used a simple MAX232 powered with 
5V and I had no problems.