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TIR1000: External clock timing requirement

Expert 3940 points

Replies: 3

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Part Number: TIR1000

Hello experts,

Does TIR1000 have external clock timing requirement like MCP2122 (datasheet P22)?

I would appreciate if you would give me comment about external clock timing requirement for TIR1000.

Thanks and best regards,
Ryo Akashi
  • Hello Akashi-san,

    The 16X clock input can be at most 2 MHz.  The degree of allowable frequency variation between the local clock and the serial baud rate is not characterized for this device since it is more of a system-level concern related to the UART data strobing.  At the decoder level, frequency mismatches or jitter could result in short-term misinterpretations of the serial bit value.  An example of this is shown in Figure 6 of the datasheet.  Typically if the UART samples at the center of the expected bit period these short-duration glitches can be tolerated.

    Regards,
    Max

  • In reply to Max Robertson:

    Hello Max-san,

    Thank you very much for your reply.
    Let me ask additional question.
    Regarding with "Rise or Fall Time", there is no requirement for TIR1000.
    Is my understanding correct?

    Thanks and best regards,
    Ryo Akashi
  • In reply to Ryo Akashi:

    That is correct.  The nominal output rise/fall times are specified in the Switching Characteristics table, but there is no restriction defined for the input rise/fall times.

    Max

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