LP3972_14 Datasheet, PDF (25/59 Pages) Texas Instruments – Power Management Unit for Advanced Application Processors

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LP3972
SNVS468J – SEPTEMBER 2006 – REVISED AUGUST 2011
OUTPUT VOLTAGE ENABLE REGISTER 2
This 8 bit output register enables and disables the output voltages on the LDOs 2,3,4 supplies.
Output Voltage Enable Register 2 (OVER2) 8h’12
Bit
7
6
5
4 ⁽¹⁾
Designation
Reserved
LDO4_EN
Reset Value
0
0
0
0
(1) One-time factory programmable EPROM registers for default values
Output Voltage Enable Register 2 (OVER2) 8h’12 Definitions
3 ⁽¹⁾
LDO3_EN
0
2 ⁽¹⁾
LDO2_EN
0
1
0
Reserved
0
0
Bit
Access
Name
Description
7
—
—
Reserved
6
—
—
Reserved
5
—
—
Reserved
4
R/W
LDO4_EN
LDO4 Output Voltage Enable
0 = LDO4 Supply Output Disabled, Default
1 = LDO4 Supply Output Enabled
3
R/W
LDO3_EN
LDO3 Output Voltage Enable
0 = LDO3 Supply Output Disabled, Default
1 = LDO3 Supply Output Enabled
2
R/W
LDO2_EN
LDO2 Output Voltage Enable
0 = LDO2 Supply Output Disabled, Default
1 = LDO2 Supply Output Enabled
1
—
—
Reserved
0
—
—
Reserved
OUTPUT VOLTAGE STATUS REGISTER 2
Output Voltage Status Register 2 (OVSR2) 8h’13
Bit
7
6
5
4
3
2
1
0
Designation
LDO_OK
N/A
N/A
LDO4_OK LDO3_OK LDO2_OK
N/A
N/A
Reset Value
0
0
0
0
0
0
0
0
Output Voltage Status Register 2 (OVSR2) 8h’13 Definitions
Bit
Access
Name
Description
7
R
LDO_OK
LDOs 2-4 Supply Output Voltage Status
0 - (LDOs 2-4) output voltage < 90% of selected value
1 - (LDOs 2-4) output voltage > 90% of selected value
6
—
—
Reserved
5
—
—
Reserved
4
R
LDO4_OK
LDO4 Output Voltage Status
0 - (V_CC_LDO4) output voltage < 90% of selected value
1 - (V_CC_LDO4) output voltage > 90% of selected value
3
R
LDO3_OK
LDO3 Output Voltage Status
0 - (V_CC_LDO3) output voltage < 90% of selected value
1 - (V_CC_LDO3) output voltage > 90% of selected value
2
R
LDO2_OK
LDO2 Output Voltage Status
0 - (V_CC_LDO2) output voltage < 90% of selected value
1 - (V_CC_LDO2) output voltage > 90% of selected value
1
—
—
Reserved
0
—
—
Reserved
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