Because that was what all the SW was written to handle from the beginning and was the frequency that was tested. The other frequency at the time had not been tested. I went with what I knew to work. Sorry if I made a mistake.
Yes, you can add additional cost and use an external oscillator if you choose. Gerald On Wed, Jan 7, 2015 at 2:52 PM, wojtekskulski via BeagleBoard < [email protected]> wrote: > Hello: > is there any particular reason why BBB uses two different crystal > frequencies, 24 MHz for the CPU and 25 MHz for the Ethernet chip? Can the > two be merged into a single 25 MHz frequency? There is a boot mode option > of using 25 MHz for the CPU. Why is it not used? > > Concerning the 12 MHz clock for the TDA12288, from the TDA12288 data sheet > I understand that the OSC_IN on this chip can be driven from a free running > oscillator. There is no timing relation between OSC_IN and the LCD data. > Therefore, the 12 MHz clock does not need to be driven by the CPU. Is my > understanding correct? > > Thank you -- Wojtek > > > > > -- > For more options, visit http://beagleboard.org/discuss > --- > You received this message because you are subscribed to the Google Groups > "BeagleBoard" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to [email protected]. > For more options, visit https://groups.google.com/d/optout. > -- Gerald [email protected] http://beagleboard.org/ http://circuitco.com/support/ -- For more options, visit http://beagleboard.org/discuss --- You received this message because you are subscribed to the Google Groups "BeagleBoard" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. For more options, visit https://groups.google.com/d/optout.
