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AM335x power up and power down

Chandrashekar Ishwaramangala Ganeshrao
Intellectual 2370 points

Other Parts Discussed in Thread: TPS54231

The query from the customer is that can there be problem of damage or latch off phenomenon issue with the interface pins in case of following 5 different conditions of power up and power down:

       1.  DC-DC TPS54231 power up after the PMIC’s (TPS65217C) IO supplies of 1.8V and 3.3V and prior to the AM335x reset release.

  1.   DC-DC TPS54231 power up prior to the PMIC’s(TPS65217C) IO supplies of 1.8V and 3.3V.
  2.  DC-DC TPS54231 power up after the AM335x reset release.
  3.   DC-DC TPS54231 power down prior to the AM335x reset.
  4.  DC-DC TPS54231 power down after the AM335x reset and all its associated supplies (TPS65217C) down.

We do know there is significant impact  on AM335x  during powerup and powerdown . 

regards

Chandra