MSP430 f DCO & R osc

Development Boards MicroMod
1

For a MSP430F2272, I didn’t manage to find the way to determinate the value of DCO frequency according to external Rosc value when used (DCOR=1). Nor in the user’s guide, nor in the component database. I didn’t find anyway a specific application note.

Thanks for your help.

2

Take a look at page 37 of the [spec sheet. It shows the DCO frequency for ROSC of 100K to 1M.

Hope this helps,

gm](http://focus.ti.com/lit/ds/symlink/msp430f2272.pdf)

3

Thanks for your answer gm.

I already saw the figure on page 37 of the datasht. From it, you can deduce the frequency corresponding to a Rosc value but only for a DCO and a RSEL pair. Ideally, I would like to be able to determinate the DCO frequency for each pair DCO/RSEL in DCOCTL register and also, obviously, for the external Rosc value.