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is there difference in Internal clock( PIOSC) in the TIVA C Series A0 and A1 versions?

Sanchit Mehra
Expert 1360 points


Hi,

I observed some difference between the A0 and A1 version of TIVA C Series "Tiva™ C Series TM4C129x"

MCU. One Difference I think is the internal clock of A0 and A1 revisions.

May I have some document mentioning all the differences between A0 and A1 Minor version of TIVA C series MCU ?

Thanks,

Sanchit Mehra

  • 0
    Guru 26105 points

    Hi,

    On the main page of your micro should be not only the data sheet, but also an errata sheet. If not, look in documents tab/pages, you will find out, surely there is.

    If you observed some difference, what is that?

    Petrei

  • 0 in reply to Petrei
    Expert 1360 points

    Yes,

    In the code , I am using the Timer driven by internal oscillator ( PIOSC) .

    The Time Interval is now getting  changed in A1 silicon which was different in silicon revision A0.

    This is what I see in the errata :

    ELEC#03 PIOSC Frequency Variance does not Meet +/- 4.5% Across Voltage and
    Temperature
    Revision(s) Affected: 2 only.
    Description: The measured internal 16-MHz precision oscillator (PIOSC) frequency variance across
    the specified voltage and temperature range when factory calibration is used is +/-6%.
    This is greater than the +/-4.5% that is specified in the data sheet.
    Workaround(s): The PIOSC can be recalibrated at a specific voltage and temperature to get maximum
    frequency variance of 1% at those conditions.

    Does this above points to the similar observation ?

    Thanks,

    Sanchit Mehra

  • 0 in reply to Sanchit Mehra
    Guru 26105 points

    Hi,

    Depends on purpose - you should be that one to decide if will satisfy your requirements. For precise timing of coarse you should use a crystal; for just some delays could be accepted, again depends. 

    And you can, of coarse, do trimming/calibrations...

    Petrei