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LP3971_16 Datasheet, PDF (27/52 Pages) Texas Instruments – Power Management Unit for Advanced Application Processors
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LP3971
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Bit
Access
6
R/W
5
R/W
4
R/W
3
R/W
2
R/W
1
R/W
0
—
Name
L4EC
LDO5_EN
LDO4_EN
LDO3_EN
LDO2_EN
LDO1_EN
—
SNVS432V – JANUARY 2006 – REVISED MAY 2013
Description
Connects LDO4 enable to SYS_EN or PWR_EN Logic Control pin
0 = LDO 4 enable connected to PWR_EN
1 = LDO 4 enable connected to SYS_EN
LDO_5 Output Voltage Enable
0 = LDO5 Supply Output Disabled
1 = LDO5 Supply Output Enabled
LDO_4 Output Voltage Enable
0 = LDO4 Supply Output Disabled
1 = LDO4 Supply Output Enabled
LDO_3 Output Voltage Enable
0 = LDO3 Supply Output Disabled
1 = LDO3 Supply Output Enabled
LDO_2 Output Voltage Enable
0 = LDO2 Supply Output Disabled
1 = LDO2 Supply Output Enabled
LDO_1 Output Voltage Enable
0 = LDO1 Supply Output Disabled
1 = LDO1 Supply Output Enabled
Reserved
LDO OUTPUT VOLTAGE STATUS REGISTER (LDOVS) 8H'13
Bit
7
6
5
4
3
2
1
0
Designation LDOS_OK
N/A
LDO5_0K LDO4_OK
LDO3_OK LDO2_OK LDO1_OK
N/A
Reset Value
0
0
0
0
0
0
0
0
LDO OUTPUT VOLTAGE STATUS REGISTER (LDOVS) 8H'13 DEFINITIONS
Bit
Access
Name
Description
7
R
LDO_OK LDO 1–5 Supply Output Voltage Status
0 = (LDO 1–5) output voltage <90% of selected value
1 = (LDO 1–5) output voltage >90% of selected value
6
—
—
Reserved
5
R
LDO5_OK LDO_5 Output Voltage Status
0 = (VCC_LDO5) output voltage <90% of selected value
1 = (VCC_LDO5) output voltage >90% of selected value
4
R
LDO4_OK LDO_4 Output Voltage Status
0 = (VCC_LDO4) output voltage <90% of selected value
1 = (VCC_LDO4) output voltage >90% of selected value
3
R
LDO3_OK LDO_3 Output Voltage Status
0 = (VCC_LDO3) output voltage <90% of selected value
1 = (VCC_LDO3) output voltage >90% of selected value
2
R
LDO2_OK LDO_2 Output Voltage Status
0 = (VCC_LDO2) output voltage <90% of selected value
1 = (VCC_LDO2) output voltage >90% of selected value
1
R
LDO1_OK LDO_1 Output Voltage Status
0 = (VCC_LDO1) output voltage <90% of selected value
1 = (VCC_LDO1) output voltage >90% of selected value
0
—
—
Reserved
VOLTAGE CHANGE CONTROL REGISTER 1 (VCC1) 8H'20
Bit
Designation
Reset Value
7
B3VS
0
6
B3GO
0
5
B2VS
0
4
B2GO
0
3
2
Reserved
0
0
1
B2VS
0
0
B2GO
0
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