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LP3971 数据表(PDF) 24 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) 24 Page - National Semiconductor (TI)

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I
2C Register Definitions (Continued)
Bit
Access
Name
Description
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
7654
3
2
10
Designation
B3VS
B3GO
B2VS
B2GO
Reserved
B2VS
B2GO
Reset Value
0000
0
0
00
VOLTAGE CHANGE CONTROL REGISTER 1 (VCC1) 8h’20 DEFINITIONS
Bit
Access
Name
Description
7
R/W
B3VS
Buck 3 Target Voltage Select
0 = Buck 3 Output Voltage to B1TV1
1 = Buck 3 Output Voltage to B1TV2
6
R/W
B3GO
Start Buck 3 Voltage Change
0 = Hold Buck 3 Output Voltage at current level
1 = Ramp Buck 3 Output Voltage as selected by B3VS
5
R/W
B2VS
Buck 2 Target Voltage Select
0 = Buck 2 Output Voltage to B2TV1
1 = Buck 2 Output Voltage to B2TV2
4
R/W
B2GO
Start Buck 2 Voltage Change
0 = Hold Buck 2 Output Voltage at current level
1 = Ramp Buck 2 Output Voltage as selected by B2VS
3:2
...
...
Reserved
1
R/W
B1VS
Buck 1 Target Voltage Select
0 = Buck 2 Output Voltage to B1TV1
1 = Buck 2 Output Voltage to B1TV2
0
R/W
B1GO
Start Buck 1 Voltage Change
0 = Hold Buck 3 Output Voltage at current level
1 = Ramp Buck 3 Output Voltage as selected by B1VS
www.national.com
24



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