LP3971_16 Datasheet, PDF (28/52 Pages) Texas Instruments – Power Management Unit for Advanced Application Processors

LP3971
SNVS432V – JANUARY 2006 – REVISED MAY 2013
VOLTAGE CHANGE CONTROL REGISTER 1 (V_CC1) 8H'20 DEFINITIONS
Bit
Access
7
R/W
6
R/W
5
R/W
4
R/W
3:2
—
1
R/W
0
R/W
Name
B3VS
B3GO
B2VS
B2GO
—
B1VS
B1GO
Description
Buck 3 Target Voltage Select
0 = Buck 3 Output Voltage to B3TV1
1 = Buck 3 Output Voltage to B3TV2
Start Buck 3 Voltage Change
0 = Hold Buck 3 Output Voltage at current level
1 = Ramp Buck 3 Output Voltage as selected by B3VS
Buck 2 Target Voltage Select
0 = Buck 2 Output Voltage to B2TV1
1 = Buck 2 Output Voltage to B2TV2
Start Buck 2 Voltage Change
0 = Hold Buck 2 Output Voltage at current level
1 = Ramp Buck 2 Output Voltage as selected by B2VS
Reserved
Buck 1 Target Voltage Select
0 = Buck 1 Output Voltage to B1TV1
1 = Buck 1 Output Voltage to B1TV2
Start Buck 1 Voltage Change
0 = Hold Buck 1 Output Voltage at current level
1 = Ramp Buck 1 Output Voltage as selected by B1VS
BUCK1 TARGET VOLTAGE 1 REGISTER (B1TV1) 8H'23
Bit
7
6
5
4
Designation
Reserved
Reset Value
0
0
0**
0**
3
2
1
Buck 1 Output Voltage (B1OV)**
1**
1**
0**
BUCK1 TARGET VOLTAGE 1 REGISTER (B1TV1) 8H'23 DEFINITIONS
Bit
Access
7:5
—
4:0
R/W
Name
—
B1OV
Reserved
Output Voltage
Data Code
5h'01
5h'02
5h'03
5h'04
5h'05
5h'06
5h'07
5h'08
5h'09
5h'0A
5h'0B
5h'0C
Description
(V)
Data Code
0.80
5h'0D
0.85
5h'0E
0.90
5h'0F
0.95
5h'11
1.00
5h'12
1.05
5h'13
1.10
5h'14
1.15
5h'15
1.20
5h'16
1.25
5h'17
1.30
5h'18
1.35
5h'19
BUCK1 TARGET VOLTAGE 2 REGISTER (B1TV2) 8H'24
Bit
7
6
5
4
Designation
Reserved
Reset Value
0
0
0
0**
3
2
1
Buck 1 Output Voltage (B1OV)**
1**
1**
0**
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0
1**
(V)
1.40
1.45
1.50
1.60
1.65
1.70
1.80
1.90
2.50
2.80
3.00
3.30
0
1**
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