Originally shared by Drew Fustini (pdp7)
Good overview by @Ron_Birkett of the PRU (Programmable Real-time Unit) in @Texas_Instruments processors such as the Sitara AM3358 used in the @BeagleBoard.org BeagleBone. (from ELC 2015)
https://www.youtube.com/watch?v=plCYsbmMbmY