ICS and Port toggling Frequency

Designer11 — Sat, 04 Aug 2012 01:12:00 GMT

Hi All,

I tried to determine whether my bus clock was set correctly at 8Mhz on the QGE32 microcontroller. I wrote a little program to toggle a port and I measured the frequency, 280Khz or 3.57 uSec. My question is how doe this port toggle frequency correlate to whether the bus frequency is 8Mhz or not.

Below is my little program

ICSC2 = 0x20;

ICSC1 = 0x06;

PTBD_PTBD7 = 0x00;

PTBDD_PTBDD7 = 0x01; //Set port B.7 output
for(;
{
PTBD_PTBD7 ^=1;
__RESET_WATCHDOG(); /* feeds the dog */
} /* loop forever */

BR,

Re: ICS and Port toggling Frequency

Designer11 — Sat, 04 Aug 2012 03:02:18 GMT

Thanks, to this thread.

https://community.freescale.com/message/34070#34070

I finally figured out the correlation between bus and port toggle frequency.

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ICS and Port toggling Frequency

Re: ICS and Port toggling Frequency