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J
jl2
Visitor II
April 1, 2005
Question

ST62T60C6

  • April 1, 2005
  • 2 replies
  • 797 views
Posted on April 01, 2005 at 12:55

ST62T60C6

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    2 replies

    J
    jl2Author
    Visitor II
    March 31, 2005
    Posted on March 31, 2005 at 08:35

    We use a ST62T60C6 to measure voltage on its CAN from a photodiode sensitive to infrared light. Sometimes, probably due to electromagnetic interferences, the microcontroller locks in a state in which it consumes something as 180mA. Then it is not able to acomplish any of its tasks, its oscillator doesn't work. Even a reset signal doesn't manage to restart it. It must be turned off before working good again.

    [ Ce message a ete modifié par : : GIELLEM on 31-03-2005 12:08 ]

    J
    joern2
    Visitor II
    April 1, 2005
    Posted on April 01, 2005 at 12:55

    This is probably a latch-up. You are pulling a port pin below Gnd or above Vcc with a higher current. If you do not limit the supply current during this state you destroy your uC.

    Have a look on the maximum ratings in the datasheet.

    Best regards

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