We solder an 8 pin dip socket to the SMT pads on a few of the SMT boards so
I can plug in JW parts. This works fine for final debugging and other
developement. For the programmer I did buy an adapter for SMT parts.



                    Mark Willis
                    <mwillis@FOXINT        To:     PICLIST@MITVMA.MIT.EDU
                    ERNET.NET>             cc:
                    Sent by: pic           Subject:     Re: 12C508/9, 12CE518/51
9
                    microcontroller        tips & tricks?
                    discussion list
                    <PICLIST@MITVMA
                    .MIT.EDU>


                    10/06/99 12:28
                    PM
                    Please respond
                    to pic
                    microcontroller
                    discussion list






ICSP is good info;  I may go for SMT on these, it'd be pretty simple &
would work.  I don't have an SMT to DIP adapter, I should go ICSP on
those!  I'm planning edge-triggered protocol, long experience has taught
me that timing isn't always dependable, so CRC's and edge triggering are
good habits to get into IMO <G>

  Mark

Jack Shidemantle wrote:
>
> Mark, I have used the 12C509 in a product we produce and used the JW
> version for debugging purposes. Also used the internal oscillator and bit
> banged for a 9600 baud serial output (out only). The only thing I ran
into
> was a difference in oscillator speed between the JW and SMT parts (enough
> to affect the serial out timing). Discovered this was due to a
> manufacturing date series on the SMT parts, reported here on the
piclist,.
> Also use "ICSP" on these and everything seems to be working fine now. Did
> not get into the "A" versions yet.
> Don't know if this helps or not.
>
>                     Mark Willis
>                     <mwillis@FOXINT        To:     PICLIST@MITVMA.MIT.EDU
>                     ERNET.NET>             cc:
>                     Sent by: pic           Subject:     12C508/9,
12CE518/519 tips
>                     microcontroller        & tricks?
>                     discussion list
>                     <PICLIST@MITVMA
>                     .MIT.EDU>
>
>                     10/06/99 11:39
>                     AM
>                     Please respond
>                     to pic
>                     microcontroller
>                     discussion list
>
> Anyone have a good web page with some good 12C508A or 509A hints?
>
> Haven't used these yet, am starting a project.  Need the low cost <G>
> 16C622/JW's just aren't the same as these!  Will plan to use internal
> oscillator, again for low cost.
>
> Making a network of these with a push button apiece, and probably 1-wire
> signalling between them (Push the push button, the appropriate ones
> sound off through a Piezo disk (Differential drive), 9V power off the
> RJ-11 cabling, I'm thinking, 78L05 at each chip, maybe?)  Should be a
> fun little project.  They want some custom sounds, I'll code THOSE on a
> 16F84 or an XT or something, I think, & then move those to the /JW part.
>
> Mainly looking for any "Gotchas", besides the Spec Sheets.  Any problems
> in coding for the 12CE519/JW, then transferring some projects to a
> 12C508A, for example?  (It's a whole buck cheaper <G>)  Client wants 'em
> CHEAP, and ubiquitous.
>
> Due to the EEPRom, may just go with the 12CE519/JW parts, does look like
> these're all reasonably similar (But then, I have -just- started to read
> the Spec sheets in depth!)
>
>   Mark