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LP3972 Arkusz danych(PDF) 25 Page - National Semiconductor (TI)

[Old version datasheet] Texas Instruments acquired National semiconductor. Click here to check the latest version.
Numer części LP3972
Szczegółowy opis  Power Management Unit for Advanced Application Processors
PDF  59 Pages
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Producent  NSC [National Semiconductor (TI)]
Strona internetowa  http://www.national.com
Logo NSC - National Semiconductor (TI)

LP3972 Arkusz danych(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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