Input/Output Pins
MPC5746R Hardware Design Guide, Rev. 1
NXP Semiconductors 25
6.2 I/O Pad Block Diagram with analog input (GPIO & Module
Multiplexer Port)
The figure below illustrates the I/O pad internal block diagram with analog inputs. This also illustrates the
internal digital/analog input control, pull-up/pull-down control and module selection. Please refer to the
system integration unit lite2 (SIUL2) chapter of the MPC5746R Reference Manual for more information.
Note: This diagram shows a PAD with full functions. Some Pads do not implement all functions. Refer the MPC5746R reference manual for the details.
Figure 14. I/O pad block diagram with analog inputs
6.3 Unused GPIO Pin Termination
Most microcontrollers are designed to be used in a variety of applications and often a particular
application does not use 100% of the MCU resources. To increase EMC performance, unused clocks,
counters or I/Os, should never be left floating or unconnected.
Following table describes the termination options that the user should follow for the unused pins.
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