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kbrown
Visitor II
December 6, 2002
Question

Reserved registers

  • December 6, 2002
  • 2 replies
  • 786 views
Posted on December 06, 2002 at 04:31

Reserved registers

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    2 replies

    K
    kbrownAuthor
    Visitor II
    May 17, 2011
    Posted on May 17, 2011 at 11:33

    Does anyone know if there is there any side effect of reading a register which is not defined? I'm particularly interested in the 92163.

    In order to ensure that I have completely initialized the processor correctly, I want to report the state of all registers once I have completed initialization. It is simpler to just read all registers rather than add code to limit the reads to defined registers. I don't care what undefined registers report, I just want to know if there is any side effect?

    Thanks!
    R
    romain2399
    Visitor II
    May 17, 2011
    Posted on May 17, 2011 at 11:33

    Several Registers have an ''Intrusive Read'' mode, you can see it when you use the Peripheral Register Window in the debugger. That means that you may reset a flag by reading these registers. You should check each one of them.

    I do not think that any hidden register with impredectible impact when read exists.
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