Problems reading MC68HC11A1 with UPA
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  1. #1
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    Default Problems reading MC68HC11A1 with UPA

    Hi friens.
    I have an ECU from Peugeot 406 IAW8P.14
    It uses an MCU 68HC11A1, in Upa PDF it doesnt exists and I am trying to read it like MC68HC11A8 they are equal.
    I am not beig able to read it, allways TXD and RESET error, already lift the pins but the error stills appearing and I cant read it.
    Anyone already has this problem and have a tip how to read it?
    Best Regards to all.
    Nuno

  2. #2
    BATLER
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    i had problem with motorola 2 ,i had lift the pin tha pdf said but with no success ,until dk forum gave me the solution by giving external power TO UPA and lifting rx dx reset only

    :http://www.digital-kaos.co.uk/forums...hc11f1-116103/

    DK POWER 1!!!

  3. The Following User Says Thank You to BATLER For This Useful Post:

    chafik4051 (22nd April, 2017)

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    but that worked in 11f1 MCU, already tried in 11A8 and no sucess.
    I dont know why I am not being able to read it, maybe the MCU is the ECU problem and is damaged.
    I dont know what to do anymore.
    Regards and thanks fo the reply mate.

  5. #4
    DK Veteran MOBILTRONIC's Avatar
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    Try next; connect all pins with wires and then take mcu between four fingers and try reading.That mcu,i have several times successfully programmed in such a way.Regard.

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    thanks mate.
    finally took it out of circuit, connected all the wires and crystal i the pins.
    At first attempt it worked, problem solved.
    But this is strange because already tried again with the same method and it doesnt read again, I must do "read" for 10 times maybe and after a lot of tries it reads.
    Well, it is solved and I think the best way is to take it out of circuit and read.
    Regards,
    Nuno

  7. #6
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    Quote Originally Posted by BATLER View Post
    i had problem with motorola 2 ,i had lift the pin tha pdf said but with no success ,until dk forum gave me the solution by giving external power TO UPA and lifting rx dx reset only

    :http://www.digital-kaos.co.uk/forums...hc11f1-116103/

    DK POWER 1!!!
    READ WITH SUCCESS
    THANKS

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    Default CONNECTION

    peugeot 406 MC68HC11A1.zip

    FINALY READ WITH SUCCESS

  9. The Following User Says Thank You to chafik4051 For This Useful Post:

    mnem (11th December, 2022)

 

 

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