How can I find out whether the PRU and CPU are driven by the same oscillator? Specifically, a colleague told me that the IEP timer (which I'm reading with the PRU) is driven by a 24 MHz oscillator that's PLL'd so the timer increments at 200 MHz, whereas the CPU is driven by a 25 MHz oscillator PLL'd so that the CPU runs at 1 GHz.
It seems to me that if they're driven by different oscillators, then they could drift apart over time. Page 1177 of the TRM (spruh73n.pdf) mentions a 32-kHz crystal oscillator, but I don't see how that's related. Also, are these oscillators within the Sitara SoC, or somewhere else on the BBB? The SRM just references 24.576 MHz oscillator (pg 70 of e14 BBB_SRM_rev 0.9.pdf), and I'm not sure how that's related to the 24/25 MHz oscillators my colleague mentioned. Thanks for your help. -- 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 beagleboard+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/beagleboard/875190da-997e-47ac-8b0a-0ea93747acb8%40googlegroups.com. For more options, visit https://groups.google.com/d/optout.
