topic Question about MC9 S08AC128 in 8-bit Microcontrollers

Question about MC9 S08AC128

MarkusWimmer — Sun, 27 Dec 2009 16:01:41 GMT

Hello, i want an external cristall clock with 8Mhz on my MCU init.

What code i must write?

void init_mcu (void){

ICGC1=??

ICGC2=??

while?

}

thanks for help

Markus

Re: Question about MC9 S08AC128

bigmac — Mon, 28 Dec 2009 13:57:21 GMT

Hello Markus,

I assume that you mean the crystal frequency is 8 MHz. You do not mention what bus frequency you require. This will determine whether you select FBE or FEE mode for the ICG module. For FBE mode, the maximum bus frequency would be 4 MHz.

Regards,

Mac