I recently lost track of my DIY adapter which I put together to allow me to program Atmel (Microchip) ATF1504AS CPLDs for my 65C02 projects, so decided to design my own adapter PCB. It's designed to work with my Atmel ATDH1150USB-K, takes a 10 pin JTAG header, has a 44 pin PLCC socket and is 2 layers (keeps the cost down).
The PCB breaks the pins out from the PLCC socket to two 22 pin headers (pins 1 to 44) for testing purposes, routes all 4 VCC pins toegther and all 4 GND pins together and these route to the JTAG header.
I received the PCBs today (ordered 5 to get the cost down and might sell the others if UK folks at interested in buying - cost price only of PCB, components and postage - let me know).
How it turned out:
1) It works
. I soldered it all together, put it in a breadboard, hooked it up and verified the design in an ATF1504AS.2) It sort of fits in a bread board (if the two 22 pin pin headers are soldered in down wards), but it only just fits with 1 row of holes down each side and it's a squeeze to get wires in due to PCB over lap. I might go for pin headers up on these ones.
3) The pin numbering and VCC/GND pin marking is visible, but a tad too small. If someone has poor eyesight it could well be too difficult to read.
I might get some more made with the following altered, but it's quite expensive to get PCBs made in the UK so I'll have a think on it:
1) Reduce the width of the PCB to allow more room for access to the breadboard holes running down each side
2) Move the 44 pin PLCC socket down and the orientate the JTAG header by 90 degreess so a 10 pin "quick removal" socket can be used (these are too wide for the current design)
Of course, I found my old DIY adapter after I ordered the above (always the way
). THe forth picture below shows them side by side.Here're the picys. Any comments/advice welcome (constructive ones only please
).
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) and time in transit. But at $26 it's very tempting...
