1) For GPS, i have tried to send the "right" command for increase the baudrate, with no sucess....it seems that the GPS receives the command but does not like it :P.
the data sheet for the module should resolve that issue

2) ulcd seems to work with higher baud rate, but i need to configure the delay times for each command. I havent really understand how to increase the baudrate corresponding to delays. The ulcd needs some delay time to accept the command and display it properly. Is it right?
the ulcd data sheet should give you that information

3) SD card with FAT 16 (when i reach that point we will discuss further). At the moment it is clear that up to 2GB fat 16 is required and is not necessary high MCU speed. But i will try to get the maximum from the PIC.
since sd cards use spi [a synchronous data transfer method] cpu osc speed is largely irrelevant as long as it not too fast for the card/mssp combination
when you use the mssp module there are several spi clock options.


a PIC18LF4550 is in my opinion not a good choice , the project calls for a chip with two eusarts.


I would like to apologize for "breaking" the original TOPIC. Is it possible an Admin to move all the discussion i have started from POST #66, in a NEW thread? Thanks.....
I agree, as I have said from the start what you are asking has no relevance to maidenhead in any way shape or form