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TPS65910: Power down sequece

Part Number: TPS65910

Hi, 

I plan to use the TPS65910 for AM335x. 

The TPS65910 will supply power the AM335x and LTE modules. 

There is an important point when turning off the power in my application. 

If a power switch is pressed, the LTE module is turned off first and then all power is turned off.

But I think the LTE module can be turned off first.

After the switch is pressed, Can the AM335x turn off the LTE module first and then make all powers off?

When the switch is pressed, does all the power immediately turn off?

Best regards

  • Hi,

      Can you please take a look at the document named "TPS65910Ax User's Guide for AM335x Processors" from Ti.com?

      Can you please share us how you do "The TPS65910 will supply power the AM335x and LTE modules"? like a block diagram? 

      

  • Hi, 

    I'm sorry my question is ambiguously.

    I want to know the power off sequence using the PWRON switch.

    I have summarized what I want to know.

    1. What does the PMIC do when it detects a switch press while power on?

    2. How can the processor recognize the switch when the PWRON switch is pressed?

    Best Regards,

  • Hi, 

      Let me try to answer your questions below:

    1. While the PMIC is power on, when the PWRON button is pressed for 6 seconds, it generates an interrupt INT_STS_REG.PWRON_LP_IT; if the application processor doesn't clear this interrupt in 2 seconds, the action is registered as a power-down event, so, power down sequence starts.
    2. Read the bit of INT_STS_REG.PWRON_LP_IT. 

        Please read through the document for more details: TPS65910Ax User's Guide for AM335x Processors (Rev. F)