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Thread: HRPWM problem on XMC 4200

  1. #1
    Beginner Beginner fraenky is on a distinguished road
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    HRPWM problem on XMC 4200

    hi,

    I have a problem with the HRPWM unit on a XMC4200.

    The problem is that when I write the values 0x3A or 0x3B into the SCR1 and SCR2 registers, a puls is missing every now and then in the output signal. All other values work fine.

    Any ideas?

    Regards
    Frank

  2. #2

    Infineon Employee
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    P. Yélamos is on a distinguished road
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    Hello,

    in order to fully understand the Problem I Need more Information on your set up? is main clock 80MHz? Do you use set and clear from CCU8 timer? which is the on time programmed in CCU8?

    If you try a higher value than 0x3B, is it working well? do you use APPs or XMC Lib?


    BR
    Pablo
    The views expressed here are my personal opinions, have not been reviewed or authorized by Infineon and do not necessarily represent the views of Infineon.

  3. #3
    Beginner Beginner fraenky is on a distinguished road
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    It shouldn't be a software problem since I ran this code on an XMC4400 without problems.

    I did a few more tests and it seems to be a problem only with one chip. On other chips it worked fine.
    So most likely a hardware problem, maybe esd-damage or production fault, who knows.

    Frank

  4. #4

    Infineon Employee
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    P. Yélamos is on a distinguished road
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    Hello,

    XMC4400 and XMC4200 have typically 2 different main clock frequencies: 120MHz and 80MHz respectively. As the Minimum step width of HRPWM is fixed to 150ps, the maximum number of steps of HR (CR1 or/and CR2) is different in both devices. That might justify your issue.

    BR
    Pablo
    The views expressed here are my personal opinions, have not been reviewed or authorized by Infineon and do not necessarily represent the views of Infineon.

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