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???
09/27/11 17:18
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#183916 - On-board debug probes
Responding to: ???'s previous message
Per Westermark said:
Some (most) of the processors have so simple electrical interfaces to access the debug cells that it is possible to glue a small extra microcontroller to a dev-board, that might translate betweeen the debug port and standard USB. It may be possible to use a SPI interface to connect to the JTAG pins. Or if the SPI port isn't flexible enough, most people will still not run JTAG at higher speeds than what is possible to bit-bang.

Ones I know:

  • Luminary Micro (now TI) use an FTDI chip - which has a USB-to-JTAG mode;

  • ST use another STM32 on their STM32 Discovery boards;

    Dunno about others

  • List of 19 messages in thread
    TopicAuthorDate
    ARM Again            01/01/70 00:00      
       Long life            01/01/70 00:00      
          Really?            01/01/70 00:00      
          It's always moving!            01/01/70 00:00      
          Compiler long life is not import            01/01/70 00:00      
       Tuppence worth            01/01/70 00:00      
       I have worked with, and liked,            01/01/70 00:00      
          s/IAR/ARM/            01/01/70 00:00      
             NXP generally have very nice chips+manuals            01/01/70 00:00      
             thanx            01/01/70 00:00      
          J-Link            01/01/70 00:00      
             JTAG is just electrical if. Magic is in the debug cells            01/01/70 00:00      
                "Debug Probe"            01/01/70 00:00      
                   Yes            01/01/70 00:00      
                      On-board debug probes            01/01/70 00:00      
          That is what the ST Rep said            01/01/70 00:00      
             300 USD Keil JTAG was better than the 25USD ST one            01/01/70 00:00      
                Same with most Keil ULINK versions.            01/01/70 00:00      
             woukln't kniow - but            01/01/70 00:00      

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