Production Data
WM8325
GENERAL DESCRIPTION............................................................................... 50
ICE AND OTP MEMORY DEFINITION ............................................................ 50
BOOTSTRAP (START-UP) FUNCTION........................................................... 51
14.1
14.2
14.3
14.3.1
14.3.2
14.3.3
14.3.4
START-UP FROM OTP MEMORY ......................................................................................51
START-UP FROM ICE MEMORY (DEVELOPMENT MODE)..............................................52
START-UP FROM DCRW REGISTER SETTINGS .............................................................52
EXTERNAL ICE MEMORY CONNECTION .........................................................................52
14.4
OTP / ICE MEMORY CONTROL...................................................................... 53
14.4.1
14.4.2
14.4.3
14.4.4
14.4.5
14.4.6
ENTERING / EXITING THE PROGRAM STATE .................................................................54
OTP / ICE READ COMMAND..............................................................................................54
OTP WRITE COMMAND .....................................................................................................55
OTP VERIFY COMMAND....................................................................................................55
OTP FINALISE COMMAND.................................................................................................56
OTP CONTROL REGISTER................................................................................................56
14.5
14.6
OTP / ICE INTERRUPTS ................................................................................. 58
DCRW MEMORY CONTENTS......................................................................... 58
14.6.1
14.6.2
14.6.3
14.6.4
14.6.5
DCRW PAGE 0 ....................................................................................................................58
DCRW PAGE 1 ....................................................................................................................59
DCRW PAGE 2 ....................................................................................................................59
DCRW PAGE 3 ....................................................................................................................60
DCRW PAGE 4 ....................................................................................................................62
15 POWER MANAGEMENT ............................................................................ 63
15.1
15.2
15.3
15.4
GENERAL DESCRIPTION............................................................................... 63
DC-DC CONVERTER AND LDO REGULATOR ENABLE ............................... 63
TIMESLOT CONTROL AND HARDWARE ENABLE (GPIO) CONTROL......... 64
OPERATING MODE CONTROL ...................................................................... 65
15.4.1
15.4.2
15.5
DC-DC SYNCHRONOUS BUCK CONVERTERS................................................................65
LDO REGULATORS ............................................................................................................65
OUTPUT VOLTAGE CONTROL ...................................................................... 65
15.5.1
15.5.2
15.5.3
DC-DC SYNCHRONOUS BUCK CONVERTERS................................................................65
LDO REGULATORS 1-10....................................................................................................66
LDO REGULATOR 11..........................................................................................................66
15.6
DC-DC SYNCHRONOUS BUCK CONVERTER CONTROL............................ 66
15.6.1
DC-DC3 / DC-DC4 DUAL MODE.........................................................................................67
LDO REGULATOR CONTROL ........................................................................ 68
HARDWARE CONTROL (GPIO)...................................................................... 68
FAULT PROTECTION...................................................................................... 69
15.7
15.8
15.9
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
16 RESERVED................................................................................................. 96
17 POWER SUPPLY CONTROL ..................................................................... 97
PD, February 2012, Rev 4.0
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WOLFSON [ WOLFSON MICROELECTRONICS PLC ]
