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TMDSIDK574: Autostart

Sergey Kurushin
Prodigy 10 points
Part Number: TMDSIDK574


I have TMDSIDK574 developement kit and i need to start processor after it powering without pressing any buttons. I found some document (www.ti.com/.../sliu011f.pdf Fig.4) which says me what I must to do with PMIC schematic. Moreover i must set bit AUTODEVON in 1 in PMU_CONFIG register. As I understood I must to use Static platform settings (or not?) and need to do next steps:

1. pin BOOT0 of TPS6590379ZWSR must be tied to VRTC_OUT(LDOVRTC_OUT).
2. pin GPIO_5 and GPIO_7 of TPS6590379ZWSR must be tied to VDD_RTC(LDO9_OUT).
3. relocate resistors R931 to R930 and R933 to 932.

If I wrong and you give me reference design or some notes to realise it i will be happy.

  • 0
    TI__Mastermind 42545 points

    Hi Sergey,

    To have the PMIC start without the button connect GPIO_7 to VRTC_OUT through a pull up resister and remove the pull-up resistor to V3_3D.  If you look at the schematic for the AM571 IDK you will see that both resistors footprints are present with text explaining the possible connections.  This is also discussed in section 2.3 of the users guide.

    Regards, Bill