Signal Descriptions
MPC5510 Microcontroller Family Reference Manual, Rev. 1
Freescale Semiconductor
2-35
Preliminary
2.7.12.9
VDD33 — 3.3 V I/O and Flash Read Supply (VFLASH)
VDD33 is the 3.3 V internal supply used for the external I/O control logic. It is intended only for the
connection of bypass capacitors, and must not be connect to load or power. (VFLASH is the on-chip flash
read supply.)
2.7.12.10 VPP — Flash Program/Erase Supply
VPP is the on-chip flash program/erase supply.
2.7.12.11 VDD — Internal Logic Supply and Flash Logic Supply (VDDF)
VDD is the 1.5 V logic and flash supply.
2.7.12.12 VSS — Internal Logic and Flash (VSSF) Ground
VSS is the ground reference for internal logic and the flash.
2.7.12.13 VDDEx — External I/O Supply
VDDEx is the 3.3 V to 5.0 V external I/O supply independently controlling the level for one of three
groups of I/O pins. (x=1,2,3.)
2.7.12.14 VSSEx — External I/O Ground
VSSEx is the external I/O ground for one of three groups of I/O pins. (x=1,2,3.)