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DM365 Standby Power Mode

DJH
Intellectual 985 points

I don't think we can use DeepSleep mode to achieve 77mW leakage power, so we're aiming to use the Standby power mode - which isn't a lot different at 79mW.  At least that is what the documentation claims in SPRAB68.pdf. 

It is not made clear how to enter this mode and I am left to think that I simply turn off all the appropriate peripherals myself.  SPRUFG5A.pdf seems to neglect mentioning this power state so clearly mentioned in the DM365 datasheet on table 2.2.

So, here are my two questions:

1.  How do I enter this Standby state (corollary: are there any registers that need to be appropriately handled)?

2.  How do I exit Standby state?

 

Also, can anyone verify the power consumption numbers?

Regards,

David

  • 0
    TI__Expert 5955 points

    Hi David,

    1.  In the standby mode,  the DM365 PLL1 and PLL2 are powered down and disabled, the system is operating in PLL bypass mode with the CLKIN as the system clock. The ARM is in the "wait-for-interrupt" sleep mode and all peripherals are disabled.

    So, to get in the standby mode:

    • Disable all peripherals -  see section 7 of SPRUFG5A
    • Power down/disable both PLL1 and PPL2 - see section 6 of SPRUFG5A
    • Put the ARM in the "wait-for-interrupt" sleep mode - see section 12.4 of SPRUFG5A

    2. To exit the standby state, it needs an external interrupt assertion to wake up the ARM out of the "wait-for-interrupt"sleep mode, enable the PLL1 and PLL2 and enable the needed peripherals.

    Thanks and regards,

    Tai