WM8325 datasheet(5/254 Pages) WOLFSON

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Production Data

WM8325

PD, February 2012, Rev 4.0

14.1

GENERAL DESCRIPTION ............................................................................... 50

14.2

ICE AND OTP MEMORY DEFINITION ............................................................ 50

14.3

BOOTSTRAP (START-UP) FUNCTION........................................................... 51

14.3.1

START-UP FROM OTP MEMORY ......................................................................................51

14.3.2

START-UP FROM ICE MEMORY (DEVELOPMENT MODE)..............................................52

14.3.3

START-UP FROM DCRW REGISTER SETTINGS .............................................................52

14.3.4

EXTERNAL ICE MEMORY CONNECTION .........................................................................52

14.4

OTP / ICE MEMORY CONTROL...................................................................... 53

14.4.1

ENTERING / EXITING THE PROGRAM STATE .................................................................54

14.4.2

OTP / ICE READ COMMAND ..............................................................................................54

14.4.3

OTP WRITE COMMAND .....................................................................................................55

14.4.4

OTP VERIFY COMMAND ....................................................................................................55

14.4.5

OTP FINALISE COMMAND .................................................................................................56

14.4.6

OTP CONTROL REGISTER ................................................................................................56

14.5

OTP / ICE INTERRUPTS ................................................................................. 58

14.6

DCRW MEMORY CONTENTS......................................................................... 58

14.6.1

DCRW PAGE 0 ....................................................................................................................58

14.6.2

DCRW PAGE 1 ....................................................................................................................59

14.6.3

DCRW PAGE 2 ....................................................................................................................59

14.6.4

DCRW PAGE 3 ....................................................................................................................60

14.6.5

DCRW PAGE 4 ....................................................................................................................62

POWER MANAGEMENT ............................................................................ 63

15.1

GENERAL DESCRIPTION ............................................................................... 63

15.2

DC-DC CONVERTER AND LDO REGULATOR ENABLE ............................... 63

15.3

TIMESLOT CONTROL AND HARDWARE ENABLE (GPIO) CONTROL......... 64

15.4

OPERATING MODE CONTROL ...................................................................... 65

15.4.1

DC-DC SYNCHRONOUS BUCK CONVERTERS................................................................65

15.4.2

LDO REGULATORS ............................................................................................................65

15.5

OUTPUT VOLTAGE CONTROL ...................................................................... 65

15.5.1

DC-DC SYNCHRONOUS BUCK CONVERTERS................................................................65

15.5.2

LDO REGULATORS 1-10 ....................................................................................................66

15.5.3

LDO REGULATOR 11..........................................................................................................66

15.6

DC-DC SYNCHRONOUS BUCK CONVERTER CONTROL............................ 66

15.6.1

DC-DC3 / DC-DC4 DUAL MODE .........................................................................................67

15.7

LDO REGULATOR CONTROL ........................................................................ 68

15.8

HARDWARE CONTROL (GPIO)...................................................................... 68

15.9

FAULT PROTECTION...................................................................................... 69

15.10 MONITORING AND FAULT REPORTING ....................................................... 69

15.11 POWER MANAGEMENT REGISTER DEFINITIONS ...................................... 70

15.11.1

DC-DC CONVERTER AND LDO REGULATOR ENABLE ...................................................70

15.11.2

DC-DC SYNCHRONOUS BUCK CONVERTER CONTROL................................................70

15.11.3

LDO REGULATOR CONTROL ............................................................................................77

15.11.4

EXTERNAL POWER ENABLE (EPE) CONTROL................................................................86

15.11.5

MONITORING AND FAULT REPORTING...........................................................................87

15.12 POWER MANAGEMENT INTERRUPTS ......................................................... 87

15.13 POWER GOOD INDICATION .......................................................................... 88

15.14 DC-DC SYNCHRONOUS BUCK CONVERTER OPERATION ........................ 90

15.14.1

OVERVIEW..........................................................................................................................90

15.14.2

DC-DC SYNCHRONOUS BUCK CONVERTERS................................................................90

15.15 LDO REGULATOR OPERATION..................................................................... 94

15.15.1

OVERVIEW..........................................................................................................................94

15.15.2

LDO REGULATORS ............................................................................................................95

RESERVED ................................................................................................. 96

POWER SUPPLY CONTROL ..................................................................... 97

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