TPS650941 PROCHOTB pin

Hi Winnie,

PCH_PWROK is active high, it goes high when the corresponding signals are power good.

RSMRSTB is active low (depending on how you look at it, the B is supposed to indicate active low). The reality is that it goes high when the initial power up sequence is competed and pulled down if either PMICEN is pulled low or if there is any emergency shutdown.

PROCHOTB pin is in the process of being renamed to PROCHOT as it has opposite polarity from that desired by final SoC. This pin is pulled low when PMIC is okay, and released (allowed to pull high) if there is a thermal event. SoC expects a high signal during normal use and pull low if PMIC ever has thermal event. As such, the signal needs to either be not used (it is optional and PMIC overtemp is not expected for our PMIC due to the excellent thermal dissipation and the use of external controllers) or it can be inverted with a simple FET, depending on customer care about.