Haodong Wang wrote:
Hi,
I was wondering that is there an easy way to set up the CPU clock
frequency for msp430? We are working on TelosB sensor motes, which
feature the MSP430x1xx CPU. We found that the CPU clock is set to 4MHz
in TinyOS. Is that difficult to change the clock to 8MHz?
Be aware, that maximum CPU clock ist supply voltage dependant! Check
http://focus.ti.com/lit/ds/symlink/msp430f148.pdf page 24. For 3.3V max
ist at about 7.2MHz.
If you do not take these max ratings in account you will get spurious
effects, which will neither be reproducable nor understandable (because
they are random...). I had sometimes problems with JTAG, on some
devices problems with the UART and so on.
Hardy
