{"id":6430,"date":"2020-04-16T17:07:14","date_gmt":"2020-04-16T17:07:14","guid":{"rendered":"http:\/\/www.max-sperling.bplaced.net\/?p=6430"},"modified":"2024-02-16T10:50:18","modified_gmt":"2024-02-16T10:50:18","slug":"jtag-adapter-arm-10-pin-arm-20-pin","status":"publish","type":"post","link":"http:\/\/www.max-sperling.bplaced.net\/?p=6430","title":{"rendered":"JTAG Adapter – ARM 10-pin <---> ARM 20-pin"},"content":{"rendered":"

We’ve got a new microcontroller board, which got a 10-pin JTAG interface for external debugging. The problem was that we just owned a J-Link EDU, which got a 20-pin JTAG interface. We needed an adapter between the 10-pin and the 20-pin JTAG.<\/p>\n

\n

Adapter<\/strong><\/p>\n\n\n
\n Schematic<\/u>
\n <\/a><\/p>\n
    \n
  • VCC … Voltage Common Collector<\/li>\n
  • GND … Ground<\/li>\n
  • TMS … Test Mode Select<\/li>\n
  • TCK … Test Clock<\/li>\n
  • TDO … Test Data Out<\/li>\n
  • TDI … Test Data In<\/li>\n
  • RST … Reset<\/li>\n<\/ul>\n<\/td>\n
\n Physical<\/u>
\n <\/a><\/p>\n
    \n
  • 2.54mm single sided perforated board<\/li>\n
  • 10×2 2.54mm straight male box header<\/li>\n
  • 10-pin 1.27mm ribbon cable<\/li>\n
  • 5×2 1.27mm straight female box header 1<\/sup><\/li>\n<\/ul>\n

    (1) I used a 10×2 1.27mm str. fem. box header\n <\/td>\n<\/tr>\n<\/table>\n

    \n

    Connection<\/strong><\/p>\n

    Desktop-PC\/Laptop [USB A (♀)] <--- USB cable ---> [USB B (♀)] J-Link
    \nJ-Link [JTAG 20-pin (♂)] <--- Ribbon cable 20-pin ---> [JTAG 20-pin (♂)] Adapter
    \nAdapter [JTAG 10-pin (♀)] <---> [JTAG 10-pin (♂)] Microcontroller board<\/p>\n

    \n

    Debugging<\/strong><\/p>\n

      \n
    1. J-Link GDB Server<\/li>\n
        \n
      1. Execute (on PC)<\/li>\n
      2. Configure (e.g Target, Protocol)<\/li>\n
      3. Start<\/li>\n<\/ol>\n
      4. GDB<\/li>\n
          \n
        1. Execute (on PC)<\/li>\n
        2. Set Binary<\/li>\n
        3. Connect and Load<\/li>\n
        4. Debug<\/li>\n<\/ol>\n<\/ol>\n","protected":false},"excerpt":{"rendered":"

          We’ve got a new microcontroller board, which got a 10-pin JTAG interface for external debugging. The problem was that we<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"inline_featured_image":false},"categories":[25],"tags":[],"_links":{"self":[{"href":"http:\/\/www.max-sperling.bplaced.net\/index.php?rest_route=\/wp\/v2\/posts\/6430"}],"collection":[{"href":"http:\/\/www.max-sperling.bplaced.net\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/www.max-sperling.bplaced.net\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/www.max-sperling.bplaced.net\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/www.max-sperling.bplaced.net\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=6430"}],"version-history":[{"count":1,"href":"http:\/\/www.max-sperling.bplaced.net\/index.php?rest_route=\/wp\/v2\/posts\/6430\/revisions"}],"predecessor-version":[{"id":16847,"href":"http:\/\/www.max-sperling.bplaced.net\/index.php?rest_route=\/wp\/v2\/posts\/6430\/revisions\/16847"}],"wp:attachment":[{"href":"http:\/\/www.max-sperling.bplaced.net\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=6430"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/www.max-sperling.bplaced.net\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=6430"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/www.max-sperling.bplaced.net\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=6430"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}