Tool/software:
The AM263P4 part requires 3.3 volts and 1.2 volts as inputs. It then makes 1.8 volts from internal Low drop out (LDO) regulators. Which of these power supplies ( if any) need to be up to its valid operating level before I apply a voltage on an A/D input? Note this part has 5 A/Ds with 6 inputs a piece and also 2 shared calibration inputs that are routed to each A/D.
Thank you
Whitney Ballard
Whitney.ballard@collins.com
If A/D inputs were applied to the AM263P4 processor part after 3.3V and 1.2V were present BUT before the 1.8V internal LDOs were ramped up to 1.8 volts, would the part be damaged? Would a conduction path be present within the AM263P4 part that would cause damage unless the 1.8 volts had ramped up? I do see in the AM263P Technical Reference Manual, Section 7.5.2.3.3.1 , (Internal ADC Voltage Reference Buffer Control) that it says
So initially, the 1.8V internal references are disabled.
Also, the only indication I see that indicates that the 1.8V LDO s are ramped up is that the WARM RESET signal has been negated. Please confirm.
Thank you
Whitney Ballard
