Hi folks,
I am starting to design a new board for a AM3352ZCZ microprocessor.
The power manager should be a TPS65217B.
I want to fix all the LDO outputs to 1V8. By default LDO1=1V8, LDO2,3,4=3V3.
So I have to use the I2C interface to re-program the levels.
Now suppose that my battery level is low, let's say 2V8.
What happens when the system starts? I mean LDO1,2,3 will not reach the expected 3V3, so PGOOD and LDO_PGOOD signals will not be released, the micro will not start and cannot reprogram the TPS65217B via I2C.
Now suppose that my battery level is OK, let's say 3V8.
What happens when the system starts? LDO1,2,3 will reach 3V3 probably breaking some circuitry before I re-program the levels via I2C.
How should I manage such a situation? Is there any of my assumptions wrong?
Many thanks for oyur help.
