WM8321 datasheet(5/253 Pages) CIRRUS

5 / 253 page

Production Data

WM8321

PD, February 2012, Rev 4.0

14.1

GENERAL DESCRIPTION ............................................................................... 49

14.2

ICE AND OTP MEMORY DEFINITION ............................................................ 49

14.3

BOOTSTRAP (START-UP) FUNCTION........................................................... 50

14.3.1

START-UP FROM OTP MEMORY ......................................................................................50

14.3.2

START-UP FROM ICE MEMORY (DEVELOPMENT MODE)..............................................51

14.3.3

START-UP FROM DCRW REGISTER SETTINGS .............................................................51

14.3.4

EXTERNAL ICE MEMORY CONNECTION .........................................................................51

14.4

OTP / ICE MEMORY CONTROL...................................................................... 52

14.4.1

ENTERING / EXITING THE PROGRAM STATE .................................................................53

14.4.2

OTP / ICE READ COMMAND ..............................................................................................53

14.4.3

OTP WRITE COMMAND .....................................................................................................54

14.4.4

OTP VERIFY COMMAND ....................................................................................................54

14.4.5

OTP FINALISE COMMAND .................................................................................................55

14.4.6

OTP CONTROL REGISTER ................................................................................................55

14.5

OTP / ICE INTERRUPTS ................................................................................. 57

14.6

DCRW MEMORY CONTENTS......................................................................... 57

14.6.1

DCRW PAGE 0 ....................................................................................................................57

14.6.2

DCRW PAGE 1 ....................................................................................................................58

14.6.3

DCRW PAGE 2 ....................................................................................................................58

14.6.4

DCRW PAGE 3 ....................................................................................................................59

14.6.5

DCRW PAGE 4 ....................................................................................................................61

POWER MANAGEMENT ............................................................................ 62

15.1

GENERAL DESCRIPTION ............................................................................... 62

15.2

DC-DC CONVERTER AND LDO REGULATOR ENABLE ............................... 62

15.3

TIMESLOT CONTROL AND HARDWARE ENABLE (GPIO) CONTROL......... 63

15.4

OPERATING MODE CONTROL ...................................................................... 64

15.4.1

DC-DC SYNCHRONOUS BUCK CONVERTERS................................................................64

15.4.2

LDO REGULATORS ............................................................................................................64

15.5

OUTPUT VOLTAGE CONTROL ...................................................................... 64

15.5.1

DC-DC SYNCHRONOUS BUCK CONVERTERS................................................................64

15.5.2

LDO REGULATORS 1-10 ....................................................................................................65

15.5.3

LDO REGULATOR 11..........................................................................................................65

15.6

DC-DC SYNCHRONOUS BUCK CONVERTER CONTROL............................ 65

15.6.1

DC-DC3 / DC-DC4 DUAL MODE .........................................................................................66

15.7

LDO REGULATOR CONTROL ........................................................................ 67

15.8

HARDWARE CONTROL (GPIO)...................................................................... 67

15.9

FAULT PROTECTION...................................................................................... 68

15.10 MONITORING AND FAULT REPORTING ....................................................... 68

15.11 POWER MANAGEMENT REGISTER DEFINITIONS ...................................... 69

15.11.1

DC-DC CONVERTER AND LDO REGULATOR ENABLE ...................................................69

15.11.2

DC-DC SYNCHRONOUS BUCK CONVERTER CONTROL................................................69

15.11.3

LDO REGULATOR CONTROL ............................................................................................76

15.11.4

EXTERNAL POWER ENABLE (EPE) CONTROL................................................................84

15.11.5

MONITORING AND FAULT REPORTING...........................................................................85

15.12 POWER MANAGEMENT INTERRUPTS ......................................................... 86

15.13 POWER GOOD INDICATION .......................................................................... 87

15.14 DC-DC SYNCHRONOUS BUCK CONVERTER OPERATION ........................ 89

15.14.1

OVERVIEW..........................................................................................................................89

15.14.2

DC-DC SYNCHRONOUS BUCK CONVERTERS................................................................89

15.15 LDO REGULATOR OPERATION..................................................................... 93

15.15.1

OVERVIEW..........................................................................................................................93

15.15.2

LDO REGULATORS ............................................................................................................94

RESERVED ................................................................................................. 95

POWER SUPPLY CONTROL ..................................................................... 96

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