At 06:55 PM 2/11/2008, you wrote:
>I've searched the archives on doing ICSP using pogo pins, and am now
>unclearer on exactly how it is done. Are through-holes used to land the
>pins on the preferred method?   Is a pc board made up to match the holes
>(or chip pins) to hold the pogo pins? What holds the assembly down
>during programming?  Are adapters (i.e. ICSP to pogo pin for SOIC / thin
>DIP chips) available somewhere? TIA!

Usually a custom or semi-custom fixture holds the board relative to the pins,
which are mounted in a plastic plate, and typically have wires going 
to a connector.

You can use either holes or circles on the PCB to mate with the pins..
you'd use different designs of pins depending on how you want to do it.

Eg: http://www.ectinfo.com/files/resource/Technical/dft_guidelinse_revf.pdf
     http://www.testfixtures.com/testfixtures/750.html

For smallish quantities, a header is cheaper.

Best regards,

Spehro Pefhany --"it's the network..."            "The Journey is the reward"
speff@interlog.com             Info for manufacturers: http://www.trexon.com
Embedded software/hardware/analog  Info for designers:  http://www.speff.com



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