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LP3971 Folha de dados(PDF) 20 Page - National Semiconductor (TI)

[Old version datasheet] Texas Instruments acquired National semiconductor. Click here to check the latest version.
Nome de Peças LP3971
Descrição Electrónicos  POWER MANAGEMENT UNIT FOR ADVANCED APPLICATION PROCESSORS
PDF  42 Pages
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Fabricante Electrônico  NSC [National Semiconductor (TI)]
Página de início  http://www.national.com
Logo NSC - National Semiconductor (TI)

LP3971 Folha de dados(HTML) 20 Page - National Semiconductor (TI)

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I
2C Register Definitions (Continued)
BACKUP BATTERY CHARGER CONTROL REGISTER (BBCC) 8h’0B
Bit
7
6
5
4
3
2
1
0
Designation
NBUB
CNBFL
nBFLT
BUCEN
IBUC
Reset Value
0
0
0
1
0
0
0
1
BACKUP BATTERY CHARGER CONTROL REGISTER (BBCC) 8h’0B DEFINITIONS
Bit
Access
Name
Description
7
R/W
NBUB
No back-up battery default setting. Logic will not allow switch over to back-up battery.
0 = Back up Battery Enabled
1 = Back up Battery Disabled
6
R/W
CNBFL
Control for nBATT_FLT output signal
0 = nBATT_FLT Enabled
1 = nBATT_FLT Disabled
5:3
R/W
BFLT
nBATT_FLT monitors the battery voltage and can be set to the De-assert voltages listed
below.
Data Code
Asserted
De-Asserted
3h’00
2.4
2.6
3h’01
2.6
2.8
3h’02
2.8
3.0
3h’03
3.0
3.2
3h’04
3.2
3.4
3h’05
3.4
3.6
2
R/W
BUCEN
Enables backup battery charger
0 = Back up Battery Charger Disabled
1 = Back up Battery Charger Enabled
1:0
R/W
IBUC
Charger current setting for back-up battery
Data Code
BU Charger I (µA)
2h’00
260
2h’01
190
2h’02
325
2h’03
390
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