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Last Post 17 Aug 2007 09:33 AM by
M5475EVB JTAG ID indicates a MCF5485 CPU
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New Member
New Member

21 Jun 2007 03:09 AM
    We just got a M5475EVB, and are starting to explore, looking at register values, etc. so we can start developing software.

    There is a register "JTAG-ID" at MBAR+0x50 that reports the actual CPU chip, that has the value 0x0800C01D.

    According to the MCF5475 manual, I should see 0x801201D for a MCF5475 part. The value that I read indicates a MCF5485 part!

    The part on the board has "MCF5475ZP266" engraved on it.
    We chose the MCF5475 because of the CPU speed, and don't care about the other peripherals that are different on the various versions.

    I also don't see anything in Motorola's errata about this. I must be missing something obvious here.
    Basic Member
    Basic Member

    17 Aug 2007 09:17 AM

    We have been able to reproduce your issue here. We had a kit that had the same issue as your kit.

    We have a function in our testing that verifies the microprocessor code is correct for the build - no matter what the silk screen says.
    Your board was tested before that verification was in place.

    This should not be an issue on newer kits.

    New Member
    New Member

    17 Aug 2007 09:33 AM
    Thanks for the answer
    The eval board is otherwise working OK, and we are making good progress with our software.

    It's interesting to know that I have one of the first ones built.
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