TPS6593-Q1: TPS6593-Q1, To gain a detailed understanding of the RTC wake-up feature

Hello Ismail,

Thank you taking the time to look at the PMIC and it's features.

The RTC needs the crystal portion of the PMIC to be populated to use the RTC feature.

The RTC is considered an ON Event which can be tied to several hardware triggers, the snippets below from the datasheet will show the details.

It should be noted that the PMIC is completely programmable from a state machine, so what the On Event does is dependent on the programming of the PMIC, which for Mindgrove with their SoC would be attractive as there can be split power domains, partial sleep mode, deep sleep with RTC wake up, etc...

If you have questions about defining the programming for such a PMIC, please do ask.

From the datasheet of the TPS6593-Q1:

An example for a PMIC that already has it's state machine defined, note (TPS6594133A is a sister product):

Ismail P said:

Example sequence: Application Board--> Power Down Signal from SoC--> PMIC disable the rails--> Interrupt generate from RTC ( In-build with PMIC)--> PMIC enable the rails.

*Bypass Mode: When Mindgrove App board is power Down, it need to Power up (wake-up ) the board wrt the External switches (ex: Touch display or Push button)

Sequence: Application Board--> Power Down Signal from SoC --> PMIC disable the rails--> Interrupt generate from  Push button ( external one)--> PMIC enable the rails.

This can be achieve from a series of different triggers, but the most important question is the expectation of safety features and would the preregulator be turned off during this Bypass Mode. The expectation from any of the wake-up is that the regulator is up and in a known good state otherwise the power up would encounter errors, otherwise this is possible.

Best Regards,

Nicholas McNamara