AVR Registers Problem

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Behzad.1947

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Hi dears
I have problem with avr registers.
1. what is the equivalent of
(PCMSK |= (1<<PCINT1); //atTINY13) on the atmega 8 ?

2. how could I set the avr(atmega8 or 16) clock on 9.6Mhz ?

Thanks
 

The interrupt control register names and settings are different on the ATmega8 than on the ATtiny13. The best way to determine the settings you need is to download the ATmega 8 data sheet and refer to the External Interrupts section.

There are a number of clock options available. They are set by the fuses. Refer to System Clock and Clock Options in the data sheet. There are 9.6 Mhz crystals available that could be used for an external oscillator. The maximum internal oscillator is 8 Mhz, but this might be able to be bumped up higher using the OSCCAL register. It would be trial and error, to see if it could be adjusted to 9.6 Mhz, and depend on the accuracy required.
 

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