ivp wrote:
>> We've always programmed (DIP) PIC chips using our PicStart+
>> programmers, but this can be a real pain when debugging code
>> and precludes the use of SMD packages. So, I'm wanting to
>> implement ICSP on all new boards where possible
>>    =20
>
> David,
>
> the PicStart+ is of limited use for ICSP because wasn't designed
> for that, and may not have the Vcc drive to power a whole circuit
>
> There are at least a couple of options
>
> Continue to use the PicStart+ and isolate the PIC with pads that
> can be bridged after programming to connect it to the circuit
>  =20
Joe & Olin,
Sorry, in my haste last night, I left a few points out in my original post.

We have an ICD2 and a PicKit3 to do the ICSP. We will only use the=20
PicStart+ units for older boards with DIP micros.

I want to use the "standard" 6 way SIL header for ICSP and not use any=20
jumpers. This means my guys can simply program the board by holding the=20
ICSP pins up to the board and pressing a button.

The 50mA for the regulator for the current project is very intermittent=20
as it's only powering a 433MHz tx module. That said, we have SOIC=20
versions in stock, so may just use that with a reverse diode.

Olin's page on ICSP did come up in a search last night. I've had a skim=20
but yet to read it in detail though.

One thing is still not perfectly clear - does the ICSP need to cycle Vcc=20
to program the chip? My limited testing showed that it did not, but is=20
this true for all chip families?
David...

--=20
___________________________________________
David Duffy        Audio Visual Devices P/L
Unit 8, 10 Hook St, Capalaba 4157 Australia
Ph: +61 7 38235717      Fax: +61 7 38234717
Our Web Site: www.audiovisualdevices.com.au
___________________________________________

--=20
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