Lpc2000

Remember that the 210x has byte order reversed so the bytes you 
should enter at location 0x40000200 are: 9A 39 00 00 if you are using 
a 14745600 crystal.

--- In lpc2000@yahoogroups.com, "Richard" <richas@y...> wrote:
> 0x3999 works fine.
> 
> Richard
> 
> --- In lpc2000@yahoogroups.com, "Leighton Rowe" 
<leightonsrowe@y...> 
> wrote:
> > Phillips_apps,
> > 
> > I'm planning to update the bootloader on the lpc2114 chip that's 
> > running on a 14.7456 MHz Xtal. I only see frequency numbers 
> provided 
> > for 10 MHz & 12 MHz that's supposed to go in Ram Buffer location 
> > 0x40000200.
> > 
> > What's the safest value to put for 14.7456 MHz? 
> > 
> > Leighton
> > 
> > --- In lpc2000@yahoogroups.com, "philips_apps" 
<philips_apps@y...> 
> > wrote:
> > > Hello Leighton,
> > > 
> > > The version of the bootloaders that do not have the improved 
> timing
> > > behavior is different for the LPC210x  and all other LPC2000 
> family
> > > members in the 64-pin or 144-pin package. 
> > > 
> > > For devices in the 64-pin package like yours, the updated 
version
> > > should be V1.63 or later. So, the bootloader you have could 
show 
> > the
> > > problem, however, as mentioned in the Errata Sheet it affects 
up 
> to
> > > 10% of the devices ot in other words, 90%+ of the devices will 
> > never
> > > show this problem. 
> > > 
> > > The most critical event is an IAP call while running the device 
> > with
> > > max speed at hot temperature (could be 10% failure rate). The 
> least
> > > critical running it at 10-12 MHz room temp (you will probably 
> never
> > > see the issue). 
> > > 
> > > Look at this Errata like a patch from some big company for their
> > > Exploration software. In all likelyhood the devices that did 
not 
> > show
> > > the problems in a given enviroment will continue to work fine 
in 
> > the
> > > same enviroment. A change in enviroment, speed, temperature... 
> > could
> > > however trigger the misbehavior. So, if you have the 
opportunity 
> to
> > > upgrade your bootloader version it is a good idea to do so, if 
> not 
> > and
> > > your environment does not change, no sweat.
> > > 
> > > Hope this helps to clarify the issue. 
> > > 
> > > Best regards, Robert