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CLKOUT low (29.4MHz) when boot-loading from parallel

Started by the_believer_1976 September 8, 2003
Hi everyone,

I am having a strange behavior when running my board with
boot via parallel bus.

The programm is completely loaded and running properly, but the
CLKOUT signal is 4 times lower than expected. It was expected
117.6MHz, but there is 29.4MHz.

Note 1: I am using the two internal DSP5407 timers, and they are
generating interruptions as if the clock was 117.6MHz!

Note 2: when debugging with my PC and JTAG interface, CLKOUT runs
at 117.6MHz. So the problem is only when booting from external memory. Any information will be very valuable.

Thank you very much,
Believer




Fixed.
Bits 13 and 14 of BSCR, on the 5407, sets a CLK divider to put on the
CLKOUT pin.
Properly setting both bits to 0 resulted on CLKOUT having the
expected frequency.

Thanks,
Believer

--- In , "the_believer_1976"
<the_believer_1976@y...> wrote:
> Hi everyone,
>
> I am having a strange behavior when running my board with
> boot via parallel bus.
>
> The programm is completely loaded and running properly, but the
> CLKOUT signal is 4 times lower than expected. It was expected
> 117.6MHz, but there is 29.4MHz.
>
> Note 1: I am using the two internal DSP5407 timers, and they are
> generating interruptions as if the clock was 117.6MHz!
>
> Note 2: when debugging with my PC and JTAG interface, CLKOUT runs
> at 117.6MHz. So the problem is only when booting from external
memory.
>
>
> Any information will be very valuable.
>
> Thank you very much,
> Believer