I am setting up to use the CC2640 in a very specific application. One function I need it to perform is programmable clock generation. In my previous system, I was using the CC1101. It had an option to bring out a divided clock on one of the GDO pins. I'm trying to implement this same function with the CC2640 but can not find anything in the documentation. Is there a way to do this that I'm not seeing or just has not been documented?
On page 26 of the CC2640 spec (SWRS176 �FEBRUARY 2015) it states that the sensor controller can perform "Waveform generation". I believe this is preformed with the GPT, page 1074 of SWCU117A�February 2015�Revised March 2015, by generating an interrupt or free running value. I think I have to route this to an I/O through the event fabric module, page 238 of SWCU117A. This seems like a very complicated way to just
generate a divide by of the 24 MHz clock. Is there a simpler way???? The only divide by I can find is the 8 bit prescaler for the 16 bit GPT.
It would be nice to implement this with just the sensor controller so that I don't have to have the main CPU running. The other option seems to be to use the SSI in the peripherals. This seems like over kill because I'm using an entire SSI module just to generate a clock. I know from page 29 of
SWRS176 that the 32 KHz clock can be used as a clock source, but can the 24 MHz clock be used and can I divide it down and send to a DIO?
Thanks, Nad
