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MSP430F149 MCLK using 32kHz?

Started by Genevieve February 24, 2008
Hi everyone,
Would like to know has anyone tried operating MCLK with only 32kHz
xtal attached? From TI TimerA sample codes, it wrote there MCLK
default uses DCO ~800kHz. However, when I try to trigger the Watchdog
timer (WDT_MRST_32), I don't see it returning to the breakpoint I've
set at the every beginning? Did I miss out anything? Please help.
Thanks! :)

Another qn, I'm trying to find out how big is the code in IAR
Embedded Workbench as I'm using the 4Kb evaluation. How to know
whether the program exceeds 4Kb? Thanks again :)

Thank you all in advance!

Cheers,
Gene

Beginning Microcontrollers with the MSP430

Yes, you certainly can. Read User's Guide and Datasheet.

Be aware that the LFXT takes quite a while to start, and most MSP430
family members do not have oscillator fault detection for LFXT. (And
some have faulty fault detection.)

TimerA usually cannot be driven by MCLK. Nor the WDT.

--- In m..., "Genevieve" wrote:
>
> Hi everyone,
> Would like to know has anyone tried operating MCLK with only 32kHz
> xtal attached? From TI TimerA sample codes, it wrote there MCLK
> default uses DCO ~800kHz. However, when I try to trigger the Watchdog
> timer (WDT_MRST_32), I don't see it returning to the breakpoint I've
> set at the every beginning? Did I miss out anything? Please help.
> Thanks! :)
>
> Another qn, I'm trying to find out how big is the code in IAR
> Embedded Workbench as I'm using the 4Kb evaluation. How to know
> whether the program exceeds 4Kb? Thanks again :)
>
> Thank you all in advance!
>
> Cheers,
> Gene
>