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shermantec
Visitor II
November 28, 2005
Question

ST72F521

  • November 28, 2005
  • 1 reply
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Posted on November 28, 2005 at 12:55

ST72F521

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    shermantecAuthor
    Visitor II
    November 28, 2005
    Posted on November 28, 2005 at 12:55

    Hello

    I used microcontroller ST72F521 in two devices with two different PCB and Routine. Both devices (were manufactured several devices of these kinds) have a very big ADC error. ADC has 16 inputs, three of them don’t work correctly: PD6(AIN6), PD7(AIN7), PF0(AIN8). These inputs have current sources, undefined in the ADC data sheets. For example: I connected the resistor 1k to ADC input and ground in series. In this circuit I got the estimated measure of 0.1 V on ADC input instead of 0 V. I set the Data Direction Register and Option Register of these pins to zero(0), so it isn’t a problem with the program.

    Pl's try to support .

    Thx

    Amir

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