Searching \ for '[PIC]: Low voltage PIC Programming' in subject line. ()
Make payments with PayPal - it's fast, free and secure! Help us get a faster server
FAQ page: www.piclist.com/techref/microchip/devprogs.htm?key=programming
Search entire site for: 'Low voltage PIC Programming'.

Exact match. Not showing close matches.
PICList Thread
'[PIC]: Low voltage PIC Programming'
2000\09\01@054715 by Michael Rigby-Jones

flavicon
face
Considering the use of the 16LF877 micro combined with 3.3 volt logic in a
product.  We need in circuit programability and we curently use a PRO MATE
with the ICSP module.  Is this going to work for 3.3 volt parts?  It looks
as though Vdd can be adjusted from within the programming dialogue in MPLAB.
Has anyone tried this?

Cheers

Mike

--
http://www.piclist.com hint: The PICList is archived three different
ways.  See http://www.piclist.com/#archives for details.

2000\09\01@094440 by Barry King

flavicon
face
Mike asked:

> We need in circuit programability and we curently use a PRO MATE
> with the ICSP module.  Is this going to work for 3.3 volt parts?

I'm not aware of those parts being 3.3 V only. I thought they were
guaranteed to run at 3.3 V to 5V, in which case you can program them
with Vdd at 5 V.  BUT, this might prove a challenge for in-circuit
programming though, if the rest of the board can't be at 5V.

>  It looks as though Vdd can be adjusted from within the programming dialogue in MPLAB.
> Has anyone tried this?

Well, typically, programming is done at nominal Vdd, and verifies are
performed at both high Vdd and low Vdd to make sure that the
thresholds are all programmed right.  I have used that feature to
make sure that the verifies were done at the right "high" and "low"
voltages for my 16LC76.  I want to make sure it will keep running a
3.3 V, even though I program at 5 V (out of circuit).

Sorry, I don't know how Vdd is set for parts with 5 V only
programming, does the "Vpp" setting change Vdd during programming?
The docs I have use an example with Vpp = 13V!

FWIW,

Barry
------------
Barry King, KA1NLH
NRG Systems "Measuring the Wind's Energy"
http://www.nrgsystems.com
Check out the accumulated (PIC) wisdom of the ages at:
PIC/PICList FAQ: http://www.piclist.org

--
http://www.piclist.com hint: The PICList is archived three different
ways.  See http://www.piclist.com/#archives for details.

2000\09\13@051849 by Michael Rigby-Jones

flavicon
face
> -----Original Message-----
> From: Barry King [SMTP:spam_OUTbarryTakeThisOuTspamNRGSYSTEMS.COM]
> Sent: Friday, September 01, 2000 3:30 PM
> To:   .....PICLISTKILLspamspam@spam@MITVMA.MIT.EDU
> Subject:      Re: [PIC]: Low voltage PIC Programming
>
> Mike asked:
>
> > We need in circuit programability and we curently use a PRO MATE
> > with the ICSP module.  Is this going to work for 3.3 volt parts?
>
> I'm not aware of those parts being 3.3 V only. I thought they were
> guaranteed to run at 3.3 V to 5V, in which case you can program them
> with Vdd at 5 V.  BUT, this might prove a challenge for in-circuit
> programming though, if the rest of the board can't be at 5V.
>
That's exactly my concern, I don't want to pop all the LV logic when I plug
in the programmer!

{Quote hidden}

Guess I shall just have to get out there with a multimeter!!

Cheers

Mike

--
http://www.piclist.com hint: To leave the PICList
piclist-unsubscribe-requestspamKILLspammitvma.mit.edu>

More... (looser matching)
- Last day of these posts
- In 2000 , 2001 only
- Today
- New search...