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TPS65218: nINT always low in a faulty board

Part Number: TPS65218

I am using the TPS65218B1RSLT with the Sitara AM4376BZDND100. Several units are not booting up as we are selecting to boot from the SD card (sysboot[4:0]= 01100b). I am comparing the faulting boards with a fully functional and all the voltage rails are withing the expected values except this signal and the following findings:

Inductor for the DCDC4 is showing a lot of noise on one end as it does not do in the working unit; replaced the inductor with a new one but the noise is still there. 

Pin 42 "nINT" is always low on all the faulty units while it is high in the functional.

Could you provide guidance if the PMIC or the Sitara SoC is faulty?

Thanks

Gabe

  • Hi Gabriel,

    Thanks for the post! Are you able to power the SoC and read the Interrupt registers (reg 0x1h and reg 0x2h)? What are the status of the interrupt registers? After reading the interrupt registers, does the nINT pin return to its high-z state? Let me know what you find out. Thanks!

    Regards,

    Paul Kundmueller