MC9S12E32CFU FREESCALE [Freescale Semiconductor, Inc], MC9S12E32CFU Datasheet - Page 442

• Manufacturer Part Number: MC9S12E32CFU
• Description: HCS12 Microcontrollers
• Manufacturer: FREESCALE [Freescale Semiconductor, Inc]

Chapter 14 Dual Output Voltage Regulator (VREG3V3V2)
14.2.3
Signals V
logic. These signals are connected to device pins to allow external decoupling capacitors (100 nF...220 nF,
X7R ceramic).
In shutdown mode an external supply at V
14.2.4
Signals V
PLL and oscillator. These signals are connected to device pins to allow external decoupling capacitors
(100 nF...220 nF, X7R ceramic).
In shutdown mode an external supply at V
14.2.5
This optional signal is used to shutdown VREG3V3V2. In that case V
be provided externally. shutdown mode is entered with V
VREG3V3V2 is either in full-performance mode or in reduced-power mode.
For the connectivity of V
14.3
This subsection provides a detailed description of all registers accessible in VREG3V3V2.
14.3.1
Figure 14-2
442
DDPLL
DD
Memory Map and Register Definition
Address
0x0000
Offset
V
V
V
Module Memory Map
provides an overview of all used registers.
/V
DD
DDPLL
REGEN
Switching from FPM or RPM to shutdown of VREG3V3V2 and vice versa
is not supported while the MCU is powered.
SS
/V
, V
are the primary outputs of VREG3V3V2 that provide the power supply for the core
SSPLL
SS
, V
— Optional Regulator Enable
— Regulator Output1 (Core Logic)
are the secondary outputs of VREG3V3V2 that provide the power supply for the
SSPLL
REGEN
see device overview chapter.
— Regulator Output2 (PLL)
VREG3V3V2 Control Register (VREGCTRL)
Table 14-2. VREG3V3V2 Memory Map
MC9S12E128 Data Sheet, Rev. 1.07
DD
DDPLL
/V
SS
/V
NOTE
can replace the voltage regulator.
Use
SSPLL
REGEN
can replace the voltage regulator.
being low. If V
DD
/V
SS
and V
REGEN
Freescale Semiconductor
DDPLL
is high, the
Access
R/W
/V
SSPLL
must