I met following problem:
Wanted to run my ADuC7026 with max possible freq.
That's why added a pice of code:
POWKEY1 = 0x01;
POWCON = 0x00; //~41MHz
POWKEY2 = 0xF4;
but when this turned on DACs outputs are not updated. I am sure of it because when commented these 3 lines everthing is fine. Can it be because of loosing synchronization ??
+ if yes, can I switch to connected kwarc using:
PLLKEY1 = 0xAA
PLLCON = 0x01 //External 32kHz crystal selection
PLLKEY2 = 0x55