Hi folks,
You got my curiosity up about using the DCO enough that I freed the Rosc
pin. The recommend 1/6W metal film 50ppm resistor looked a bit bulky,
but I found and 0805 25ppm part. It's .1% (unneeded) and 74 cents :(.
The cheaper 1% 0603 parts are all 100ppm.
I assume that this resistor gets connected to GND.
Then, I could not find the relevant doc for the FLL algorithm. I'm using
an MSP430F1611.
Could someone point me to the correct app. note or such.
Thanks,
Garst
[email protected] wrote:
Hi,
You can eliminate DCO jitter using FLL algorithm and a
32Khz crystal! I use this and my rs232 work at 115200
bps.
it depends on the hardware. If the supply voltage is not stable,
e. g. modulated by a opto coupler, that does not work.
And a 8 MHz resonator +int. caps does cost only about 50 cent.
But the main reason why i didn't used FLL algorithm was that with
20 Bytes left it's not possible.
With the newer msps you can use a hardware FLL so you only need the
32768 Hz quartz.
Regards,
Rolf
