68300

I'm sorry I can't help.
But it's nice to see some action on this group.

On Thursday, May 20, 2004, at 01:01  AM, mygroup111 wrote:

> Hello list,
>
> I am using 68332 TPU UART function and having the problem to use it
> with slow baud, say less than 100 bps. The UART function seems not
> working well with any speed lower than 200 for TPU clock of
> 16777000 / 4. If I slow down the TPU clock to 16777000 / 32, it works
> with 100bps.
>
> The UART document only mentioned the upper limit of the speed, but
> does not tell what is the slowest speed it can be used.
>
> To solve the problem, I tried to switch the clock to lower speed when
> I used it for slow baud and changed it back after the task was done.
> However, I got a problem that the TCR1P and PSCK fields in TPUMCR
> register can only be written once after the reset, hence prevents
> from dynamically changing the TPU clock.
>
> It would be very helpful if anybody can provide answers to the
> following questions:
> 1) What is the low speed limit of UART function?
> 2) How to (or is it possible) to change TPU clock dynamically without
> resetting 68332?
>
> Any advice will be mostly welcome.
>
> Thanks in advance.
>
> John
>
>
>
>
> ---------------------------------------------------To learn more about 
> Motorola Microcontrollers, please visit
> http://www.motorola.com/mcu
>
> learn more about Motorola Microcontrollers, please visit
> http://www.motorola.com/mcu
>
>
>
>
<image.tiff>
>
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>
Tim Flynn
Director of R&D
RMS Welding Systems
Ph.(780)955-3907
http://www.rmsweldingsystems.com


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