Brent Brown wrote:
> What do you do when you've run out of program space in a PIC16F88? I'm looking 
> through the Microchip website but can't find anything ideal yet. The perfect solution 
> would be a drop in pin compatible chip with all the same features but 8K words of 
> Flash instead of 4K.
> 
> Features I need are self writable Flash for bootloader, internal RC oscillator, some 
> EEPROM, PWM, USART, 28 pin QFN package, more than 4K words of program 
> space (probably 6-8K). PIC16F886 looks like a contender but it doesn't apprear to 
> be available yet (who knows when?), also not pin-compatible but could do a PCB 
> re-design (don't really want to). Is there another chip out there I just haven't seen 
> yet? eg. What is a PIC16F89 and why can't I find it on the Microhip site? Google 
> finds a few references to it but I have no hard facts.
> 
> For my prototypes I think I can just squeeze in enough of the program to get them  
> running, but there will be some extra features required for production units. I need 
> to add LCD menu's for installer setup options etc, which eats up code space I don't 
> have. Program is written in Hi-Tech PICC, and I'm not blaming that for my code size 
> problems. I'm doing all the things I can think of to minimise space used.
> 
If nothing else presents itself, I would examine the listing to check 
for extra unneeded instructions.  For example, bank switching when it's 
not needed, etc.  But that's a long shot in terms of getting much from 
it.  Maybe factoring the program to eliminate redundant code...

-- 
http://www.piclist.com PIC/SX FAQ & list archive
View/change your membership options at
http://mailman.mit.edu/mailman/listinfo/piclist