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LP3971 Datasheet(PDF) 23 Page - National Semiconductor (TI)

[Old version datasheet] Texas Instruments acquired National semiconductor. Click here to check the latest version.
Part # LP3971
Description  POWER MANAGEMENT UNIT FOR ADVANCED APPLICATION PROCESSORS
PDF  42 Pages
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Manufacturer  NSC [National Semiconductor (TI)]
Direct Link  http://www.national.com
Logo NSC - National Semiconductor (TI)

LP3971 Datasheet(HTML) 23 Page - National Semiconductor (TI)

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I
2C Register Definitions (Continued)
LDO OUTPUT VOLTAGE ENABLE REGISTER (LDOEN) 8h’12
Bit
7
6
54321
0
Designation
L5EC
L4EC
LDO5_EN
LDO4_EN
LDO3_EN
LDO2_EN
LDO1_EN
Reserved
Reset Value
0
0
11111
0
LDO OUTPUT VOLTAGE ENABLE REGISTER (LDOEN) 8h’12 DEFINITIONS
Bit
Access
Name
Description
7
R/W
L5EC
Connects LDO5 enable to SYS_EN or PWR_EN Logic Control pin
0 = LDO 5 enable connected to PWR_EN
1 = LDO 5 enable connected to SYS_EN
6
R/W
L4EC
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
5
R/W
LDO5_EN
LDO_5 Output Voltage Enable
0 = LDO5 Supply Output Disabled
1 = LDO5 Supply Output Enabled
4
R/W
LDO4_EN
LDO_4 Output Voltage Enable
0 = LDO4 Supply Output Disabled
1 = LDO4 Supply Output Enabled
3
R/W
LDO3_EN
LDO_3 Output Voltage Enable
0 = LDO3 Supply Output Disabled
1 = LDO3 Supply Output Enabled
2
R/W
LDO2_EN
LDO_2 Output Voltage Enable
0 = LDO2 Supply Output Disabled
1 = LDO2 Supply Output Enabled
1
R/W
LDO1_EN
LDO_1 Output Voltage Enable
0 = LDO1 Supply Output Disabled
1 = LDO1 Supply Output Enabled
0
...
...
Reserved
LDO OUTPUT VOLTAGE STATUS REGISTER (LDOVS) 8h’13
Bit
7
6
5
4321
0
Designation
LDOS_OK
N/A
LDO5_0K
LDO4_OK
LDO3_OK
LDO2_OK
LDO1_OK
N/A
Reset Value
0
0
0
0000
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
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