Freescale Semiconductor MPC8313E PowerQUICC II Pro Family Reference Manual page 298

System Configuration
Regulator
VDDC VDDAC
MPC8313E Agent
NOTES:
N-FET: ON Semi NTR4501NT1G or similar.
VDDC: Constant VDD for digital I/O, partial SoC digital core region.
VDDAC: Constant VDD for analog I/O, partial SoC analog region.
VDD: Switched VDD for internal digital logic, partial SoC digital core region.
VDDA: Switched VDD for internal analog circuits, partial SoC analog region.
Figure 5-58. Example VDD Control of Device as Agent Using the Optional PMC_PWR_OK Signal
Regulator
VDDC VDDAC
MPC8313E Host
MPC8313E PowerQUICC™ II Pro Integrated Processor Family Reference Manual, Rev. 2
5-90
EXT_PWR_CTRL VDD VDDA
PCI_PME
EXT_PWR_CTRL VDD VDDA
PCI_PME
Figure 5-59. Example VDD Control of Device as Host
5 V provided externally to the PC board
N-FET used to switch off internal core voltage (VDD)
1 V
5 V provided externally to the PC board.
The host can control external power using GPIO
1 V
and a second regulator to support PCI 3.3 VAUX
or other user-defined method.
GPIO VAUX Control
External Host
PCI_PME
External Host
PCI_PME
Freescale Semiconductor