8-bit MicrocontrollersのトピックRe: wake from stop mode2

wake from stop mode2

fignon — Thu, 21 Feb 2008 23:24:39 GMT

Hello,
I have some troubles to exit stop mode 2.

Here is my code (it is just to test stop mode):

#define STOPMODE2 0x03
#define STOPMODE3 0x00

/* Init Stop Mode*/
SPMSC1 = 0x10 ; //disable low-voltage detect to enable stop mode 1 and 2
SPMSC2=STOPMODE3 ;

/* Init RTI Mode*/
SRTISC_RTIACK=1 ;
SRTISC=0x57; /*overflow every 1.024s*/

for( ; ; )
{
asm stop;
}

interrupt void vrti()
{
SRTISC_RTIACK=1 ;
LED2=~LED2 ;
}

This code works with stop mode3, should I modify anything for stop mode 2 ?

Re: wake from stop mode2

allawtterb — Fri, 22 Feb 2008 05:23:18 GMT

Which exact microcontroller are you using?

Re: wake from stop mode2

fignon — Fri, 22 Feb 2008 15:39:24 GMT

I'm using the MC1321x

Re: wake from stop mode2

allawtterb — Fri, 22 Feb 2008 22:57:24 GMT

Take a look at AN2493, it describes the Stop modes for the core used in the MC1321X. This is true except that Stope mode 1 is not allowed for the MC1321X. I think the resolution to your problem can be found on the stop mode 2 section on page 4. The link to the app note is below.

http://www.freescale.com/files/microcontrollers/doc/app_note/AN2493.pdf?fsrch=1