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'ISP'
1998\03\11@080438 by Mark Lezama

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Where can I find a ISP, I would like design something in PCB that I can
reprogram without take off anything from the board.

Mark Lezama.

1998\03\14@180615 by Alessandro Zummo

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I want to add an ISP connector to my programmer...
what is the most used/standard pinout?
and the most used/standard implementation
on the destination board? (i.e. how to
deal vith Vpp7Vdd connection on the PIC,
with RB6/RB7 conflicts, etc)

--

  - *Alex* -

 http://freepage.logicom.it/azummo/


'ISP'
1998\04\23@072550 by White Horse Design
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What's the easiest way to program a PIC16C74A surface mount device in-circuit?

I have a PICSTart+ but these new devices I'm using will be manufactured and
placed (unprogrammed) by our PCB manufacturer.

Regards

Adrian

WWW    WWW   Adrian Gothard
WWW WW WWW   White Horse Design
WWWWWWWWWW   +44-385-970009 (Mobile/SMS), +44-118-962-8913/4 (voice/fax)
WWWW  WWWW   spam_OUTwhdTakeThisOuTspamzetnet.co.uk, http://www.users.zetnet.co.uk/whd
---
Developers of GPS satellite-based tracking systems

1998\04\23@073805 by tjaart

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White Horse Design wrote:

> What's the easiest way to program a PIC16C74A surface mount device in-circuit?
>
> I have a PICSTart+ but these new devices I'm using will be manufactured and
> placed (unprogrammed) by our PCB manufacturer.

Use a bed of nails to get to 5V,GND,MCLR,RB6 and RB7 pads. It isbetter if you supply your 5V from
the PVB itself.
Don't use a PROMaster for in circuit programming. We've had heaps
of shit with earth loops etc with a few different PROMasters with ISP.
It may be a wonderfull programmer, but it was not designed for ISP.

BTW we ended up designing our own programmer for Mchip and
Motorola (It uses an Intel mcu). It solved all our problems.

--
Friendly Regards

Tjaart van der Walt
.....tjaartKILLspamspam@spam@wasp.co.za

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1998\04\23@123437 by Jerry Meng

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At 12:24 PM 4/23/98 +0100, you wrote:
>What's the easiest way to program a PIC16C74A surface mount device
in-circuit?
>I have a PICSTart+ but these new devices I'm using will be manufactured and
>placed (unprogrammed) by our PCB manufacturer.
Hi Adrian,
PICstart is ok to do the ISP, I have done this with PIC16C73A SOIC package,
use a cable connect PICstart PB7 PB6 RESET and GND, operate just like
normal pragramming.

>Developers of GPS satellite-based tracking systems
It seems we do the same job, I use PIC16C73A to control a Motorola
SM50 mobile radio and send out the Rockwell GPS message.

Good Luck



Jerry Meng, BA1FB

.....ba1fbKILLspamspam.....qsl.net
http://www.qsl.net/ba1fb

1998\04\24@014831 by White Horse Design

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At 00:29 24/04/98 +0900, you wrote:
>At 12:24 PM 4/23/98 +0100, you wrote:
>
>>What's the easiest way to program a PIC16C74A surface mount device
>in-circuit?
>>I have a PICSTart+ but these new devices I'm using will be manufactured and
>>placed (unprogrammed) by our PCB manufacturer.
>
>Hi Adrian,
>PICstart is ok to do the ISP, I have done this with PIC16C73A SOIC package,
>use a cable connect PICstart PB7 PB6 RESET and GND, operate just like
>normal pragramming.

Some messages have suggested putting 470p caps on RB6 and RB7 - but I think
I saw a message a long time ago that said that they'd had to be removed for
reliable (PICstart+ I think) operation.

>>Developers of GPS satellite-based tracking systems
>
>It seems we do the same job, I use PIC16C73A to control a Motorola
>SM50 mobile radio and send out the Rockwell GPS message.

My PIC16C74A is controlling a Motorola GPS too! (with a wireless GSM modem).

Regards

Adrian

WWW    WWW   Adrian Gothard
WWW WW WWW   White Horse Design
WWWWWWWWWW   +44-385-970009 (Mobile/SMS), +44-118-962-8913/4 (voice/fax)
WWWW  WWWW   EraseMEwhdspam_OUTspamTakeThisOuTzetnet.co.uk, http://www.users.zetnet.co.uk/whd
---
Developers of GPS satellite-based tracking systems


'ISP'
1998\06\24@122009 by miked
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.......
> permanently connected between the socket and the header. THe rest of the
> lines (Vdd,Vss,MCLR,and two others which I cannot remember at this point,
> just look at http://www.microchip.com at the programming specifications, the
> first page of the sheet lists them). These lines are switched between the
> header and the IDC connector (going to the programmer). You can determine
> the pinout of the programmer's IDC header by using an ohmmeter to check
> conductivity to each of the 5 pins involved in the programming. If you
> want, I can take a look at the one I built and tell you the pinout, but I
> am at work right now and it would probably be quicker for you to just
> check it with the meter.
>
> I built mine in a day, it cost about $10, and it works great!

Is switching Vss necessary?

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