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stc stc89c54rd controller

Discussion in 'Microcontrollers, Programming and IoT' started by chipsfish, Apr 24, 2013.

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  1. chipsfish

    chipsfish

    2
    0
    Apr 24, 2013
    Hi

    We bought a treadmill around two years ago, we hadn't used it much (either too lazy or too busy) so usage was around 6-10 times a year. Anyway the wife decided to go on it but it beeps now when starting up, flashes a date of manufacture on the led display followed by a E01 code.

    I called the company that made the thing with no response so I emailed them and got an email back a few days later, basically I would need to purchase a new board at $270. I took the board to a component store and they couldn't 'fix it'.

    The board has few components on them the main one is a chip "stc89c54rd 40c pdip40"
    All the leds are working, the other capacitors must be working else there wouldn't be any leds lights on.

    I was thinking about getting a bunch of these mcu from china as there only 0.43$ each and then copying the mcu software onto a blank one. But if the chip is encrypted, I wouldn't know what to do.

    Do you think I should just buy the board (what if that goes dolally in two years as well!) or
    attempt to clone it onto another chip?

    I'm a newbie at electronics so I wouldn't know what to purchase to clone it if I went down that route. Do you have any recommendations on software or hardware (that can also copy encrypted chips, if it is)?

    thanks and sorry for the long post.
     
  2. (*steve*)

    (*steve*) ¡sǝpodᴉʇuɐ ǝɥʇ ɹɐǝɥd Moderator

    25,497
    2,838
    Jan 21, 2010
    I wouldn't bet on it being the microcontroller at first. It's far more likely to be something else.

    Post a picture of both sides of the board and let's see what we can see.

    It would be really nice to know what the E01 error means...
     
  3. chipsfish

    chipsfish

    2
    0
    Apr 24, 2013
    thanks Steve,

    My daughter has the camera so when she pops back from university I'll take some pictures of the board.

    I told the support people about the E01 and all they said was it needs a new board. I've tried finding out about the error code online but drew a blank.
     
    Last edited: Apr 24, 2013
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