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LP3972 bảng dữ liệu(PDF) 25 Page - National Semiconductor (TI)

[Old version datasheet] Texas Instruments acquired National semiconductor. Click here to check the latest version.
tên linh kiện LP3972
Giải thích chi tiết về linh kiện  Power Management Unit for Advanced Application Processors
PDF  59 Pages
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LP3972 bảng dữ liệu(HTML) 25 Page - National Semiconductor (TI)

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I
2C Compatible Interface (Continued)
OUTPUT VOLTAGE ENABLE REGISTER 1
This register enables or disables the low voltage supplies LDO1 and Buck1. See details below.
Output Voltage Enable Register 1 (OVER1) 8h’10
Bit
76543
2
1
0
Designation
Reserved
S_EN
Reserved
A_EN
Reset Value
00000
1
0
1
Output Voltage Enable Register 1 (OVER1) 8h’10 Definitions
Bit
Access
Name
Description
7-3
—
—
Reserved
2
R/W
S_EN
V
CC_SRAM (LDO5) Supply Output Enabled
0=V
CC_SRAM (LDO5) Supply Output Disabled
1=V
CC_SRAM (LDO5) Supply Output Enabled
1
—
—
Reserved
0
R/W
A_EN
V
CC_APPS (Buck1) Supply Output Enabled
0=V
CC_APPS (BUCK1) Supply Output Disabled
1=V
CC_APPS (BUCK1) Supply Output Enabled
OUTPUT VOLTAGE STATUS REGISTER
This 8 bit register is used to indicate the status of the low voltage supplies. By polling each of the specify supplies is within its
specified operating range.
Output Voltage Status Register 1 (OVSR1) 8h’11
Bit
7
6543
2
1
0
Designation
LP_OK
Reserved
S_OK
Reserved
A_OK
Reset Value
0
0000
0
0
0
Output Voltage Status Register 1 (OVSR1) 8h’11 Definitions
Bit
Access
Name
Description
7
R
LP_OK
Low Voltage Supply Output Voltage Status
0-V
CC_APPS (Buck1) & VCC_SRAM (LDO5) output voltage < 90% of
selected value
1-V
CC_APPS (Buck1) & VCC_SRAM (LDO5) output voltage > 90% of
selected value
6:3
—
—
Reserved
2
R
S_OK
V
CC_SRAM Supply Output Voltage Status
0-V
CC_SRAM (LDO5) output voltage < 90% of selected value
1-V
CC_SRAM (LDO5) output voltage > 90% of selected value
1
—
—
Reserved
0
R
A_OK
V
CC_APPS Supply output Voltage Status
0-V
CC_APPS(BUCK1) output voltage < 90% of selected value
1-V
CC_APPS(BUCK1) output voltage > 90% of selected value
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