3.2.47 draft

typos, improve appendix

also c2000 doesn't guarantee exact adc early trigger cycles https://e2e.ti.com/support/microcontrollers/c2000-microcontrollers-group/c2000/f/c2000-microcontrollers-forum/612597/tms320f28379d-can-i-read-the-adc-result-just-in-time-in-cpu