MC9S12NE64CPVE Datasheet, PDF (382/554 Pages) Freescale Semiconductor, Inc – MC9S12NE64 Device Overview

Chapter 13 Penta Output Voltage Regulator (VREGPHYV1)
13.2.2.2 VDDA, VSSA - Regulator Reference Supply
Signals VDDA/VSSA which are supposed to be relatively quiet are used to supply the analog parts
of the regulator. Internal precision reference circuits are supplied from these signals. A chip
external decoupling capacitor (100nF...220nF, X7R ceramic) between VDDA and VSSA can
further improve the quality of this supply.
13.2.2.3 VDD, VSS - Regulator Output1 (Core Logic)
Signals VDD/VSS are the primary outputs of VREG_PHY that provide the power supply for the
core logic. These signals are connected to device pins to allow external decoupling capacitors
(100nF...220nF, X7R ceramic).
In Shutdown Mode an external supply at VDD/VSS can replace the voltage regulator.
13.2.2.4 VDDPLL, VSSPLL - Regulator Output2 (PLL)
Signals VDDPLL/VSSPLL are the secondary outputs of VREG_PHY that provide the power
supply for the PLL and Oscillator. These signals are connected to device pins to allow external
decoupling capacitors (100nF...220nF, X7R ceramic).
In Shutdown Mode an external supply at VDDPLL/VSSPLL can replace the voltage regulator.
13.2.2.5 VDDAUX1,2,3, VSSAUX1,2,3 - Regulator Output3,4,5
Signals VDDAUX1,2,3/VSSAUX1,2,3 are the auxilliary outputs of VREG_PHY. These signals
are connected to device pins to allow external decoupling capacitors (100nF...220nF, X7R
ceramic).
In Shutdown Mode an external supply at VDDAUX1,2,3/VSSAUX1,2,3 can replace the voltage
regulator.
13.2.2.6 VREGEN - Optional Regulator Enable
This optional signal is used to shutdown VREG_PHY. In that case VDD/VSS and
VDDPLL/VSSPLL must be provided externally. Shutdown Mode is entered with VREGEN
being low. If VREGEN is high, the VREG_PHY is either in Full Performance Mode or in Reduced
Power Mode.
For the connectivity of VREGEN see device specification.
NOTE
Switching from FPM or RPM to shutdown of VREG_PHY and vice
versa is not supported while MCU is powered.
MC9S12NE64 Data Sheet, Rev. 1.1
382
Freescale Semiconductor