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LP3972 Datasheet(PDF) 37 Page - Texas Instruments

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Part # LP3972
Description  Power Management Unit for Advanced Application Processors
PDF  59 Pages
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Manufacturer  TI1 [Texas Instruments]
Direct Link  http://www.ti.com
Logo TI1 - Texas Instruments

LP3972 Datasheet(HTML) 37 Page - Texas Instruments

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LP3972
www.ti.com
SNVS468J – SEPTEMBER 2006 – REVISED AUGUST 2011
Bit
Access
Name
Description
1
R
WUPT
TEST_JIG Pin Wake Up Status
0 = No wake up event
1 = Wake up event
0
R
WUPS
SPARE Pin Wake Up Status
0 = No wake up event
1 = Wake up event
BACKUP BATTERY CHARGER CONTROL REGISTER (BCCR)
This register specifies the status of the main battery supply. NBUB bit
Backup Battery Charger Control Register (BCCR) 8h’89
Bit
7(1)
6
5(1)
4(1)
3(1)
2
1
0
Designation
NBUB
CNBFL
nBFLT
BUCEN
IBUC
Reset Value
0
0
0
1
0
0
0
1
(1)
One time factory programmable EPROM registers for default values
Backup Battery Charger Control Register (BCCR) 8h’89 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, Default
1 = Back up Battery Disabled
6
R/W
CNBFL
Control for nBATT_FLT output signal
0 = nBATT_FLT Enabled
1 = nBATT_FLT Disabled
nBATT_FLT monitors the battery voltage and can be set to the Assert voltages
listed below.
Data Code
Asserted
De-Asserted
3h’01
2.6
2.8
5:3
R/W
BFLT
3h’02
2.8
3.0 (Default)
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
Charger current setting for back-up battery
Data Code
BU Charger I (µA)
2h’00
260
1:0
R/W
IBUC
2h’01
190 (Default)
2h’02
325
2h’03
390
MARVELL PXA INTERNAL 1 REVISION REGISTER (II1RR) 8H’8E
Bit
7
6
5
4
3
2
1
0
Designation
II1RR
Reset Value
0
0
0
0
0
0
0
0
MARVELL PXA INTERNAL 1 REVISION REGISTER (II1RR) 8H’8E DEFINITIONS
Bit
Access
Name
Description
7:0
R
II1RR
Intel internal usage register for revision information.
Copyright © 2006–2011, Texas Instruments Incorporated
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Product Folder Links: LP3972



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