It is the clocking frequency used by the USBasp programmer while communicating with the ATtiny84A microcontroller. It only applies to that process. It is not setting a clock speed that will be used by ATtiny84A for other processes.
It is the clocking frequency used by the USBasp programmer while communicating with the ATtiny84A microcontroller. It only applies to that process. It is not setting a clock speed that will be used by ATtiny84A for other processes.