Lpc2000

skyspyco wrote:
> --- In lpc2000@yahoogroups.com, "Karl Olsen" <kro@...> wrote:
>>
>> --- In lpc2000@yahoogroups.com, "skyspyco" <pperlic@> wrote:
>> >
>> > I recently switched development boards from the Olimex LPC2138
> to the
>> > LPC2148.  Now it seems that the standard Philips Flash Utility
> (ver.
>> > 2.2.0) that I was using for the LPC2138 does not include the
> LPC2148
>> > in its supported devices list.
>> >
>> > What are you using to program the flash on the LPC2148?  Is
> Lpc21isp
>> > the only free Win tool for flash programming on the LPC2148?
>>
>> LPC2000 Flash Utility 2.2.3 supports LPC2148.  Start at "All
> LPC2000
>> Products" at
> http://www.standardics.philips.com/products/lpc2000/all/ ,
>> open a CPU, select Support Docs.
>>
>> I haven't yet found a way from http://www.philips.com to that "All
>> LPC2000 Products" page.
>>
>> Karl Olsen
>>
> 
> Karl, thanks for the link to the new version.  I could not find it
> under the LPC2148 product folder.
> 
> 
> Also noticed that it does not seem to connect to the Olimex LPC2148
> board above the 38.4k baud rate.  My other Olimex LPC2138 board
> works all the way through 115.2k baud.

I guess this is because the LPC2138 board has a 14.something MHz
crystal that is an exact multiple of 115200 so it can generate
the standard bitrates with 0% error.

The LPC2148 probably has a 12.000 MHz crystal (required to generate
the 48 MHz clock for USB), which is not an exact multiple of 115200
so the standard bitrates always have some error. The error is too
big for bitrates above 38k4.

Bertrik