Freescale Semiconductor MPC5553 - I;O Power;Ground Segmentation

MPC5553/MPC5554 Microcontroller Reference Manual, Rev. 5
Freescale Semiconductor 2-57
2.3.14.12 External I/O Supply Input
V
DDEn
V
DDE
is the 1.8–3.3 V (10%) external I/O supply input.
2.3.14.13 External I/O Supply Input
V
DDEHn
V
DDEHn
is the 3.3–5.0 V (–10% to +5%) external I/O supply input.
2.3.14.14 Fixed 3.3 V Internal Supply Input
V
DD33
V
DD33
is the 3.3 V ( 10%) internal supply input.
2.3.14.15 Ground
V
SS
V
SS
is the ground reference input.
2.3.15 I/O Power/Ground Segmentation
Table 2-3 gives the preliminary power/ground segmentation of the MPC5553 MCU. Table 2-4 gives the
preliminary power/ground segmentation of the MPC5554 MCU. Each segment provides the power and
ground for the given set of I/O pins and can be powered by any voltage within the allowed voltage range
regardless of the power on the other segments. The power/ground segmentation applies regardless of
whether a particular pin is configured for its primary function or GPIO.