PXD20RM Datasheet, PDF (1576/1628 Pages) Freescale Semiconductor, Inc – PXD20 Microcontroller

Name
VDDR
VSSR
VRC
Table 48-1. Voltage Regulator External Signals
Type
Supply
Ground
Output
Voltage
3.0 V - 5.5 V
-
-
Description
Power Supply for the voltage regulators
Ground supply for digital core and voltage regulators
Regulator drive for external NPN transistor base
48.3.3 Detailed signal descriptions
48.3.3.1 VDDR
VDDR is the 3.3 V to 5 V supply for the voltage regulators and LVD blocks. See the PXD20
Microcontroller Data Sheet for details of recommended decoupling capacitance on this pin.
48.3.3.2 VRC
VRC is the 1.2 V regulator output that drives the base of the external NPN ballast transistor.
48.4
Memory map and register definition
Table 48-2. Voltage Regulator Memory Map
Address
VREG_BASE + 0x0000
Register
VREG_CTL - Voltage Regulator Control Register
Location
on page 48-4
48.4.1 Voltage Regulator Control Register (VREG_CTL)
Address Offset: 00h
Access: User read/write
0
1
R₀
0
W
Reset ₀
0
2
3
4
5
6
7
8
9
10 11 12 13 14
15
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
16
R₀
W
Reset ₀
17
18
19 20 21 22 23 24 25 26 27 28 29 30
31
0
0
0
0
0
0
0
0
0
0
0
0
0
0 5V_LVD
_MASK
0
0
0
0
0
0
0
0
0
0
0
0
0
0
1
Figure 48-2. Voltage Regulator Control Register (VREG_CTL)
48-4
PXD20 Microcontroller Reference Manual, Rev. 1
Preliminary—Subject to Change Without Notice
Freescale Semiconductor