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LP3971 数据表(PDF) 22 Page - National Semiconductor (TI)

[Old version datasheet] Texas Instruments acquired National semiconductor. Click here to check the latest version.
部件名 LP3971
功能描述  POWER MANAGEMENT UNIT FOR ADVANCED APPLICATION PROCESSORS
PDF  42 Pages
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制造商  NSC [National Semiconductor (TI)]
网页  http://www.national.com
标志 NSC - National Semiconductor (TI)

LP3971 数据表(HTML) 22 Page - National Semiconductor (TI)

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I
2C Register Definitions (Continued)
BUCKS OUTPUT VOLTAGE ENABLE REGISTER (BOVEN) 8h’10
Bit
7
6
543210
Designation
Reserved
B2ENC
Reserved
B3EN
Reserved
B2EN
Reserved
B1EN
Reset Value
0
1
0
1
0
1
0
1
BUCKS ENABLE REGISTER (BOVEN) 8h’10 DEFINITIONS
Bit
Access
Name
Description
7
...
...
Reserved
6
R/W
B2ENC
Connects Buck 2 enable to SYS_EN or PWR_EN Logic Control pin
0 = Buck 2 enable connected to PWR_EN
1 = Buck 2 enable connected to SYS_EN
5
...
...
Reserved
4
R/W
B3EN
VCC_Buck3 Supply Output Enabled
0 = VCC_Buck3 Supply Output Disabled
1 = VCC_Buck3 Supply Output Enabled
3
...
...
Reserved
2
R/W
B2EN
VCC_Buck2 Supply Output Enabled
0 = VCC_Buck2 Supply Output Disabled
1 = VCC_Buck2 Supply Output Enabled
1
...
...
Reserved
0
R/W
B1EN
VCC_Buck1 Supply Output Enabled
0 = VCC_Buck2 Supply Output Disabled
1 = VCC_Buck2 Supply Output Enabled
BUCK STATUS REGISTER (BOVSR) 8h’11
Bit
7
6
5
4
3
2
1
0
Designation
BT_OK
Reserved
Reserved
B3_OK
Reserved
B2_OK
B1_OK
Reset Value
0
0
0
0
0
0
0
0
BUCK STATUS REGISTER (BOVSR) 8h’11 DEFINITIONS
Bit
Access
Name
Description
7
R
BT_OK
Buck 1–3 Supply Output Voltage Status
0 = (Buck 1–3) output voltage <90% Default value
1 = (Buck 1–3) output voltage >90% Default value
6:5
...
...
Reserved
4
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
3
...
...
Reserved
2
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
1
...
...
Reserved
0
R
B1_OK
Buck 1 Supply Output Voltage Status
0 = (Buck 1) output voltage <90% Default value
1 = (Buck 1) output voltage >90% Default value
www.national.com
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