LP3972 datasheet(33/59 Pages) TI1

33 / 59 page

LP3972

www.ti.com

SNVS468J – SEPTEMBER 2006 – REVISED AUGUST 2011

Bit

Access

Name

Description

R/W

BPTR

Bypass LDO_RTC Output Voltage to LDO3 Output Voltage Tracking

0 - LDO_RTC3 Tracking enabled

1 - LDO_RTC3 Tracking disabled, Default

R/W

WUP3

Spare Wakeup control input

0 - Active High

1 - Active Low

3:2

R/W

GPIO2

Configure direction and output sense of GPIO2 Pin

Data Code

GPIO2

2h’00

Hi-Z

2h’01

Output Low

2h’02

Input

2h’03

Output high

1:0

R/W

GPIO1

Configure direction and output sense of GPIO1 Pin

Data Code

GPIO1

2h’00

Hi-Z

2h’01

Output Low

2h’02

Input

2h’03

Output high

OUTPUT ENABLE 3 REGISTER (OEN3) 8H’82

Bit

4(1)

2(1)

0(1)

Designation

Reserved

B3EN

ENFLAG

B2EN

Reserved

L1EN

Reset Value

(1)

One time factory programmable EPROM registers for default values

OUTPUT ENABLE 3 REGISTER (OEN3) 8H’82 DEFINITIONS

Bit

Access

Name

Description

7:5

—

Reserved

R/W

B3EN

VCC_Buck3 Supply Output Enabled

0 = VCC_Buck3 Supply Output Disabled

1 = VCC_Buck3 Supply Output Enabled, Default

R/W

ENFLAG

Enable for Temperature Flags (BCT)

0 = Temperature Flag Disabled

1 = Temperature Flag Enabled

R/W

B2EN

VCC_Buck2 Supply Output Enabled

0 = VCC_Buck2 Supply Output Disabled

1 = VCC_Buck2 Supply Output Enabled, Default

—

Reserved

R/W

L1EN

LDO1 (MVT)Output Voltage Enable

0 = LDO1 Supply Output Disabled

1 = LDO1 Supply Output Enabled, Default

STATUS REGISTER 3 (OSR3) 8H’83

Bit

Designation

BT_OK

B3_OK

B2_OK

LDO1_OK

Reserved

BCT2

BCT1

BCT0

Reset Value

STATUS REGISTER 3 (OSR3) DEFINITIONS 8H’83

Bit

Access

Name

Description

BT_OK

Bucks 2-3 Supply Output Voltage Status

0 - (Bucks 1-3) output voltage < 90% Default value

1 - (Bucsk 1-3) output voltage > 90% Default value

Submit Documentation Feedback

Product Folder Links: LP3972

LP3972 Datasheet(PDF) 33 Page - Texas Instruments

LP3972 Datasheet(HTML) 33 Page - Texas Instruments

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59

Datasheet Download

Link URL