Verify the processor pin label
correspond to the correct pin numbers listed in the Pin Attributes
section of the device-specific data sheet.
Verify the supply voltages
connected to the processor power pins are within the recommended operating
condition.
All the pins of the processor (grouped into functions and having separate symbol
blocks) are shown in the schematics to minimize tool related and functional
errors.
Most of the processor IOs are
turned off by default. External pull resistors are recommended to hold inputs of
any attached device in a valid logic state until software initializes the IOs.
Use of pull resistor is attached device dependent.
All Reserved pins of the
processor, are recommended to be named as RSVD and left unconnected (do not
connect signal traces/test points to these processor pads).
For any processor pad (pin) that
has a trace connected and not being used or not being actively driven, an
external pull resistor is recommended.
For board performance
improvement, consider implementing external voltage, current or temperature
monitoring.