Other Parts Discussed in Thread: TPS22965,
We are using the PMIC TPS6521902 in our design for powering up AM625x. We require clarification regarding the below queries,
1,We understand that EN/PB/VSENSE is default set to PB in case of TPS6521902.As per datasheet its not recommended to change this setting through I2C.So we want to understand the functionality of this PB pin. Other than to perform a cold reset , what are the other scenarios during which Push button requires to be pressed? TI in one of the calls mentioned that PB needs to be pressed to bring the PMIC from Low power state to Active state. Is this in addition to the ON/OFF I2C request which can be made through software control? Also is a manual intervention required every time to wake up the PMIC by pressing Push button? We require your immediate feedback on this as this is very critical to our design as the application is for a fire panel safety system where manual intervention is not a feasible option to maintain the system active.
2,If the PMIC TPS6521902 is accidentally given +5V input instead of +3.3V (i.e if Vsys= 5V), what would be the implications? Is there a way by which the TPS6521902 is programmed to detect this and accordingly enable or disable the power switch TPS22965? else 5V would be fed to AM62xx on the pins which require 3.3V.
3,Its mentioned in datasheet that RESET pin of PMIC can be configured for both WARM and COLD reset. What is the default configuration and is COLD reset applicable to 02 variant?
4,What is the significant difference between Active and Standby state? Whether any output rails are disabled?