We don't want people having to hold some pogo thing against the board; they only have two hands and need to type too. So each board would need fixturing. Now, we just plug a ribbon cable from a jtag pod into the header.
We use reduced pin JTAG 2mm 10 pin SMD 57202-G52-05LF 4mm post about $0.85/100 57202-G51-05LF 2mm post about $0.55/100
Wired up a 10 conductor 2.54mm pitch cable and female IDC to a
2mm pitch IDC female. The 2.54 plugs into the jtag programmer.
I've used this method. The board had holes, and my pins had shoulders so they located in the holes but didn't shoot right down. It was a bit awkward.
If I was doing it again I'd use two actual pins on the pogo fixture to locate it, and have the pins contact topside pads with no holes.
Clifford Heath.
Pretty easy to make this on a bit of PCB, as I said above.
Clifford Heath.
you can also cheat and use regular pin headers that locks in a modified footprint
Why? They should have finished typing, and just need to hit ENTER. Anything beyond that is development, not production programming.
Clifford Heath
The computer may not be in close reach.
And we do development too.
Really, people want to save a dollar and waste expensive people's time.
Alternatively, people who CBF setting up their production area sensibly.
Obviously you'd just solder something in for development.
You can use one of these:
I used them but my problem was board space and these really didn't save anything.
That one has a full shroud (it covers the ends too) the pins seem to be about the same length and girth. The 20Meg contact resistance is hopefully a typo!
plating is gold flash so probably not only good for a few insertion cycles.
TAG Connect.
Tim
Use the card edge if you can. Otherwise the old fashioned (100mil?)pin headers. They tend to be cheapest. samtec is good if you need specific height or stackable thingies, but otherwise too expensive.
Can't they be programmed through their serial port? Might need an extra jumper to hold a boot pin high?
Use standard 20 x 0.1" headers and one of these:
The issue there is all the wasted space at the ends. There's no good reason for all that extra plastic as far as I can tell, and it won't fit the footprint we're using. :(
The NXP LPClink programmer boards use those.
Thanks
Phil Hobbs
I use an 8-pin header, it carries all the pins needed (+power, Gnd, TMS, TDI, TDO and TCLK). Actually, I have 3 grounds, too. I just leave a 2X4
2mm hole pattern on the board and do not stuff it. I have a cable adapter made up for my Xilinx programming pod, and put a through-hole header in the pod's connector. I push the pins of the header into the holes it the board and apply a little sideways pressure during programming. The header is made from the snap-to-length dual-row 2mm header stock from China.I get it from Digi-Key, part # 609-2624. There are probably cheaper lines of this, too.
Jon
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