> -----Original Message-----
> From: piclist-bounces@mit.edu [mailto:piclist-bounces@mit.edu] On
Behalf
> Of Michael Watterson
> Sent: 04 May 2010 13:27
> To: Microcontroller discussion list - Public.
> Subject: Re: [PIC] More program memory
> 
> Michael Rigby-Jones wrote:
> >
> >> -----Original Message-----
> >>
> >>
> > The 18F parts can execute code directly from external memory,
something
> > that is not possible with an SPI memory solution.
> >
> I thought we were talking about storing/recall  data, not Program.
> 
> The only real reason to use 18F8xJxx for Program memory is if you
exceed
> 128K bytes, then indeed external chips using SPI, I2C, SD card, or
> de-multiplexing a single 8bit port is no use.
> 
> If you need more than 128K byte PROGRAM memory, is the 8 bit PIC a
> correct choice compared to an off the shelf OS + PIC 32 or ARM?

Since the OP specified "Program memory", and has linked to an app-note
explaining the details of extending program memory, I assumed he wanted
more program memory.  I might be wrong...

If continued development of an application has caused the code to exceed
the on-board memory limits, then it's entirely possible that adding
external memory (and probably a larger PIC for the extra pins) would be
cheaper and/or quicker than porting the code to a different architecture
and possibly having to buy all new development tools.

If you were starting from scratch then I'd agree, you are starting with
the wrong device,

Mike

=======================================================================
This e-mail is intended for the person it is addressed to only. The
information contained in it may be confidential and/or protected by
law. If you are not the intended recipient of this message, you must
not make any use of this information, or copy or show it to any
person. Please contact us immediately to tell us that you have
received this e-mail, and return the original to us. Any use,
forwarding, printing or copying of this message is strictly prohibited.
No part of this message can be considered a request for goods or
services.
=======================================================================

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