18F46K22 being dyslexic


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  1. #1
    Join Date
    Mar 2003
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    Commerce Michigan USA
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    Default Re: 18F46K22 being dyslexic

    Comwarrior, I have been watching this thread quite closly because I have been using the 18F46K22's for quite some time. I have never noticed a problem with them being "Dyslexic". However, I have never ASSUMED the state of ANY registers of ANY PIC's I have used in the past. How could you assume the state to be as printed in the documentation when there is nothing like a BIOS to set them after a power on sequence or a power disturbance. Poweron states are slightly better than random as far as I have seen in the past so I have ALWAYS set ALL register states after poweron or reset.... You should too..... Never assume anything...
    Dave Purola,
    N8NTA
    EN82fn

  2. #2
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    Default Re: 18F46K22 being dyslexic

    Dave,

    No, All registers have a defined power-on state. And those states are clearly listed in the datasheet. There's nothing random about it.
    I've never seen a chip power-up with in-correct states before, so i would like to see what comwarrior found.

    People should NOT try to initialize every register at the beginning of the program.
    This creates many more problems then it will ever solve, since most people will not bother to read the datasheet to find out what they should set them to.

    comwarrior,
    What revision is the datasheet you are using?
    DT

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