ATF150x JTAG adapter

This board is a plug-in adapter to program ATF150x CPLDs on a J-Link. It supports both 5V and 3.3V variants, and provides testpoints to inject 12V to unlock a locked device.

• Schematic
• IBOM

For parts, see the schematic fields. "BOM" numbers are references to my internal stock keeping system, but you should be able to find equivalents easily. I may have spare PCBs on hand too, just ask.

Powering the board

This board is meant to be powered directly by the J-Link. To enable power delivery, use the command power on from the control utility. If you always want this, try power on perm. Note that power is supplied out a separate pin that is normally not used, so this is generally safe to keep enabled.

Programming the chips

The process needed to program these is pretty unobvious. Here's what I do:

• Create a logic file in WinCUPL. You should get a .JED output.
• Use ATMISP7 (same link) to translate this to a .svf
  • Create a new one-device chain
  • Set the device name appropriately
  • Select "Program/Verify" as the JTAG instruction
  • Select your .JED file as the "JEDEC File"
  • Choose "Write SVF file"
• Program using openocd:

openocd -f /usr/share/openocd/scripts/interface/jlink.cfg \
    -c "adapter speed 400" \
    -c "transport select jtag" \
    -c "jtag newtap ATF1502AS tap -irlen 3 -expected-id 0x0150203f" \
    -c init \
    -c "svf FILENAME.svf" \
    -c "sleep 200" \
    -c shutdown

Note that the chip name and ID in this command don't actually need to match (they may be able to be removed entirely).

License/copyright

Intellectual property is bullshit. This is everyone's design.

Contact me (issue reports, patches, bare board requests)

Send an email to my username at alexisvl.rocks. I suggest mentioning the project name in the subject line.