mc9s12xd256 Freescale Semiconductor, Inc, mc9s12xd256 Datasheet - Page 564

• Manufacturer Part Number: mc9s12xd256
• Description: Hcs12x Microcontrollers
• Manufacturer: Freescale Semiconductor, Inc

Chapter 14 Voltage Regulator (S12VREG3V3V5)
14.3.2.6
The Reserved 06 is reserved for test purposes.
14.3.2.7
The Reserved 07 is reserved for test purposes.
14.4
14.4.1
Module VREG_3V3 is a voltage regulator, as depicted in
are the regulator core (REG), a low-voltage detect module (LVD), a control block (CTRL), a power-on
reset module (POR), and a low-voltage reset module (LVR).
14.4.2
Respectively its regulator core has two parallel, independent regulation loops (REG1 and REG2) that differ
only in the amount of current that can be delivered.
The regulator is a linear regulator with a bandgap reference when operated in full peformance mode. It acts
as a voltage clamp in reduced power mode. All load currents flow from input V
reference circuits are supplied by V
14.4.2.1
In full peformance mode, the output voltage is compared with a reference voltage by an operational
amplifier. The amplified input voltage difference drives the gate of an output transistor.
564
Reset
Reset
W
W
R
R
Functional Description
General
Regulator Core (REG)
Reserved 06
Reserved 07
Full Performance Mode
0
0
0
0
7
7
= Unimplemented or Reserved
= Unimplemented or Reserved
0
0
0
0
6
6
DDA
MC9S12XDP512 Data Sheet, Rev. 2.17
0
0
0
0
5
5
Figure 14-8. Reserved 06
Figure 14-9. Reserved 07
and V
SSA
0
0
0
0
4
4
.
Figure
0
0
0
0
3
3
14-1. The regulator functional elements
0
0
0
0
2
2
DDR
to V
Freescale Semiconductor
0
0
0
0
1
1
SS
or V
SSPLL
0
0
0
0
0
0
. The