I am trying to understand the flow for using a 1pps input as a way to produce a precise RTC. After searching around the TI E2E community I ran across this post where I found an application that looks similar to what I am trying to do with respect to using 1pps. I just don’t know how this is ultimately used to make the RTC more accurate.
https://e2e.ti.com/support/arm/sitara_arm/f/791/t/262837
From that post and the code that is provided, Timer 7 can be used to generate a clock which can be connected to tclkin. Likewise tclkin can be selected to be an input to the PRCM, but this is where I lose it. It's not obvious that I can connect this tclkin to the RTC IP via the PRCM, and even if I could, it's not the proper frequency. So how does the 1pps input get used to generate a precise RTC? What am I missing here?
