Normal flag clearing not working when TFFCA is set (D60A)?

Started by Oliver Betz March 31, 2004
Hello All,

using a timer output compare interrupt, I tried to reset the
corresponding bit in TFLG1 by writing a '1' to it.

This didn't seem to work - only the "fast clear" mechanism worked
(writing TCx).

Is this:

- my error (wrong observation),
- by design (and documentation error),
- a D60A error?

Would be nice if anybody could confirm this.

Oliver
--
Oliver Betz, Muenchen



Oliver,

With the TFFCA bit set, the normal flag clearing mechanism does not work.

Regards,
Gordon

===============================================================
Gordon Doughman Ph: 937-438-6811
Motorola Semiconductor Fax: 937-434-7457
Field Applications Engineer Pager: 800-759-8352 Pin: 1304089
Suite 175
3131 Newmark Drive
Miamisburg, OH 45342

Check out my HC12 book at:
http://www.rtcbooks.com/programming.php
Oliver Betz wrote:

>Hello All,
>
>using a timer output compare interrupt, I tried to reset the
>corresponding bit in TFLG1 by writing a '1' to it.
>
>This didn't seem to work - only the "fast clear" mechanism worked
>(writing TCx).
>
>Is this:
>
>- my error (wrong observation),
>- by design (and documentation error),
>- a D60A error?
>
>Would be nice if anybody could confirm this.
>
>Oliver
>




Gordon Doughman <> wrote:

> With the TFFCA bit set, the normal flag clearing mechanism does not
> work.

Thanks for the confirmation, Gordon.

Reading again "MC68HC912D60A Rev 3.0" I find that this behaviour is
not documented. Do you think it's useful I file a service request, or
do you have better communication channels?

Oliver
--
Oliver Betz, Muenchen



Oliver,

Your best bet is to file a service request.

Regards,
Gordon

===============================================================
Gordon Doughman Ph: 937-438-6811
Motorola Semiconductor Fax: 937-434-7457
Field Applications Engineer Pager: 800-759-8352 Pin: 1304089
Suite 175
3131 Newmark Drive
Miamisburg, OH 45342

Check out my HC12 book at:
http://www.rtcbooks.com/programming.php
Oliver Betz wrote:

>Gordon Doughman <> wrote: >>With the TFFCA bit set, the normal flag clearing mechanism does not
>>work.
>>
>
>Thanks for the confirmation, Gordon.
>
>Reading again "MC68HC912D60A Rev 3.0" I find that this behaviour is
>not documented. Do you think it's useful I file a service request, or
>do you have better communication channels?
>
>Oliver
>