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LP3972 数据表(PDF) 39 Page - National Semiconductor (TI)

[Old version datasheet] Texas Instruments acquired National semiconductor. Click here to check the latest version.
部件名 LP3972
功能描述  Power Management Unit for Advanced Application Processors
PDF  59 Pages
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制造商  NSC [National Semiconductor (TI)]
网页  http://www.national.com
标志 NSC - National Semiconductor (TI)

LP3972 数据表(HTML) 39 Page - National Semiconductor (TI)

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I
2C Compatible Interface (Continued)
OUTPUT ENABLE 3 REGISTER (OEN3) 8H’82
Bit
7
6
5
4**
3
2**
1
0**
Designation
Reserved
B3EN
ENFLAG
B2EN
Reserved
L1EN
Reset Value
0
0
0
1
0
1
0
1
Note: ** denotes one time factory programmable EPROM registers for default values
OUTPUT ENABLE 3 REGISTER (OEN3) 8H’82 DEFINITIONS
Bit
Access
Name
Description
7:5
—
—
Reserved
4
R/W
B3EN
V
CC_Buck3 Supply Output Enabled
0=V
CC_Buck3 Supply Output Disabled
1=V
CC_Buck3 Supply Output Enabled, Default
3
R/W
ENFLAG
Enable for Temperature Flags (BCT)
0 = Temperature Flag Disabled
1 = Temperature Flag Enabled
2
R/W
B2EN
V
CC_Buck2 Supply Output Enabled
0=V
CC_Buck2 Supply Output Disabled
1=V
CC_Buck2 Supply Output Enabled, Default
1
—
—
Reserved
0
R/W
L1EN
LDO_1 (MVT)Output Voltage Enable
0 = LDO1 Supply Output Disabled
1 = LDO1 Supply Output Enabled, Default
STATUS REGISTER 3 (OSR3) 8H’83
Bit
7
6
5
4
3
2
1
0
Designation
BT_OK
B3_OK
B2_OK
LDO1_OK
Reserved
BCT2
BCT1
BCT0
Reset Value
0
0
0
0
0
0
0
0
STATUS REGISTER 3 (OSR3) DEFINITIONS 8H’83
Bit
Access
Name
Description
7
R
BT_OK
Buck 2-3 Supply Output Voltage Status
0 - (Buck 1-3) output voltage < 90% Default value
1 - (Buck 1-3) output voltage > 90% Default value
6
R
B3_OK
Buck 3 Supply Output Voltage Status
0 - (Buck 3) output voltage < 90% Default value
1 - (Buck 3) output voltage > 90% Default value
5
R
B2_OK
Buck 2 Supply Output Voltage Status
0 - (Buck 2) output voltage < 90% Default value
1 - (Buck 2) output voltage > 90% Default value
4
R
LDO1_OK
LDO_1 Output Voltage Status
0-(V
CC_LDO1) output voltage < 90% of selected value
1-(V
CC_LDO1) output voltage > 90% of selected value
3
—
—
Reserved
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