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Baud Rate-Timer 1-P89v51RD2

The NXP P89V51RD2 has the ability to choose either Timer1 or Timer2 as the baud rate generator for it's UART.

If I were to use the Timer 1 in mode 2 (auto reload), what is the relation between the baud rate and the crystal frequency in Normal and X2 modes?

I'm using the UART in mode 1(8 bit variable baud rate).

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  • There is no formula in the data sheet
    you are right, i forgot NXP fortunately does not include "biblical" information in the datasheets.

    use the formula in "the bible"

    Erik

    re 'fortunately'; a datasheet is sooooo much easier to use when it is not crowded with 'common stuff'

    Just look at the SILabs 300+ page datasheets, you have to wade through tons of redundant stuff to miss what you need to find. 'miss' is not a typho

Reply
  • There is no formula in the data sheet
    you are right, i forgot NXP fortunately does not include "biblical" information in the datasheets.

    use the formula in "the bible"

    Erik

    re 'fortunately'; a datasheet is sooooo much easier to use when it is not crowded with 'common stuff'

    Just look at the SILabs 300+ page datasheets, you have to wade through tons of redundant stuff to miss what you need to find. 'miss' is not a typho

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