Unused Interfaces of AM5728

Hi,

Please check processors.wiki.ti.com/.../AM572x_Schematic_Checklist

Unused Signals

Signals on interfaces that are unused can typically be left as no connect. Many of the IOs have a Pad Configuration Register (see the Control Module chapter of the TRM for more details) which gives control over the input capabilities of the I/O (INPUTENABLE field in each conf_<module>_<pin> register). Software should disable the receivers I/Os which are no connects (ie, INPUTENABLE=0) as soon as possible during initialization. This INPUTENABLE field defaults to "input active" for most signals, which means there is a potential for some leakage during powerup of the chip if the input floats to a mid-supply level before the software can initialize the I/O. This should only be a concern if you are attempting to power up the design with a minimum power consumption. Most designs should be able to tolerate this small amount of leakage in each floating I/O until the software has a chance to disable it. After disabling the receiver of the I/O, no leakage will occur.
Refer to section 4.1 in the Data Manual for specific guidance on certain unused pins.