Gao Zhengsu wrote: > Hi, everybody: > I have a question about system frequency. When I use an 8 MHz > crystal in > XT2, can I change system frequency from 8MHz to 1MHz simply by divider at run > time without losing anything.
basicaly yes, div 8 is the highest divider you can select in the basic clock module and you can switch it at runtime. switching clocks can be tricky in some cases, e.g. if you want to have a realtime clock running accurately. it's not the same as connecting a lower frequency crystal. in general faster clocks use more current. so using a faster crystal than you need means less battery life. chris
