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TPS65910A1 PMIC for Sitara AM3359 ZCZ

Jure Zaninovich
Prodigy 190 points

I have designed a board which is for the most part a "clone" of the ICE ( http://www.ti.com/tool/tmdxice3359 ) ,

with many other devices as required for our application.

The problem I am facing now is that the PMIC is not getting out of the "OFF" state.

The actual PMIC part is marked:

                                             TPS65910A1

                                             TI   1BK

                                              CPQ9    G4

The most telling symptom is that Vref is stuck at zero Volt 

( NOTE: measured that Pin 18  is not shorted to GND )

Other measurements are:

BOOT1= 1.8V  ;     BOOT0=  0V

0 V    =  SLEEP = NRESPWRON = INT1 = VDDIO = REFGND

1.8 V = VRTC = PWRHOLD

0.1 V = TESTV

5.0 V = PWRON = VCCIO

5.0 V = VCC1 = VCC2 = VCC3 = VCC4 = VCC5 = VCC6 = VCC7 = VBACKUP

Questions:

Is this the right PMIC for this processor ?

Any insight about what may be wrong?

Is there a document indicating how to actually bring up a board such as this,

with the procedures for flashing all the devices with the proper data so that the system will wake up ?

Thanks, Jure Z.

  • 0
    Prodigy 190 points

    I've found that the right PMIC part number is : TPS65910AA1

    I gave some detail in

    http://e2e.ti.com/support/power_management/pmu/f/43/p/185916/671240.aspx#671240

    Please correct the Documentation for the ICE, Schematic and BOM.

    http://www.ti.com/litv/zip/sprr170

    Thanks, Jure Z.

    Thanks, Jure Z.

  • 0 in reply to Jure Zaninovich
    Prodigy 190 points

    For the curious, a few more points to add, answering my own questions.

    I managed to have our custom board operate correctly with CCS.

    We can boot from SPI ,  debug, and also on a reset jump from boot  to APP on uSD card.

    A new boot loader was also built.

    One thing we had to do is to clone the flash configuration from the FTDI device into the blank new one on our board. We used the FTDI utility for this purpose.

    This way we have the three standard devices recognized by the windows device manager.

    There was no need to program the I2C device to get to this point.

    Jure Z.