Production Data
WM8321
GENERAL DESCRIPTION............................................................................... 49
ICE AND OTP MEMORY DEFINITION ............................................................ 49
BOOTSTRAP (START-UP) FUNCTION........................................................... 50
14.1
14.2
14.3
14.3.1
14.3.2
14.3.3
14.3.4
START-UP FROM OTP MEMORY ......................................................................................50
START-UP FROM ICE MEMORY (DEVELOPMENT MODE)..............................................51
START-UP FROM DCRW REGISTER SETTINGS .............................................................51
EXTERNAL ICE MEMORY CONNECTION .........................................................................51
14.4
OTP / ICE MEMORY CONTROL...................................................................... 52
14.4.1
14.4.2
14.4.3
14.4.4
14.4.5
14.4.6
ENTERING / EXITING THE PROGRAM STATE .................................................................53
OTP / ICE READ COMMAND..............................................................................................53
OTP WRITE COMMAND .....................................................................................................54
OTP VERIFY COMMAND....................................................................................................54
OTP FINALISE COMMAND.................................................................................................55
OTP CONTROL REGISTER................................................................................................55
14.5
14.6
OTP / ICE INTERRUPTS ................................................................................. 57
DCRW MEMORY CONTENTS......................................................................... 57
14.6.1
14.6.2
14.6.3
14.6.4
14.6.5
DCRW PAGE 0 ....................................................................................................................57
DCRW PAGE 1 ....................................................................................................................58
DCRW PAGE 2 ....................................................................................................................58
DCRW PAGE 3 ....................................................................................................................59
DCRW PAGE 4 ....................................................................................................................61
15 POWER MANAGEMENT ............................................................................ 62
15.1
15.2
15.3
15.4
GENERAL DESCRIPTION............................................................................... 62
DC-DC CONVERTER AND LDO REGULATOR ENABLE ............................... 62
TIMESLOT CONTROL AND HARDWARE ENABLE (GPIO) CONTROL......... 63
OPERATING MODE CONTROL ...................................................................... 64
15.4.1
15.4.2
15.5
DC-DC SYNCHRONOUS BUCK CONVERTERS................................................................64
LDO REGULATORS ............................................................................................................64
OUTPUT VOLTAGE CONTROL ...................................................................... 64
15.5.1
15.5.2
15.5.3
DC-DC SYNCHRONOUS BUCK CONVERTERS................................................................64
LDO REGULATORS 1-10....................................................................................................65
LDO REGULATOR 11..........................................................................................................65
15.6
DC-DC SYNCHRONOUS BUCK CONVERTER CONTROL............................ 65
15.6.1
DC-DC3 / DC-DC4 DUAL MODE.........................................................................................66
LDO REGULATOR CONTROL ........................................................................ 67
HARDWARE CONTROL (GPIO)...................................................................... 67
FAULT PROTECTION...................................................................................... 68
15.7
15.8
15.9
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
16 RESERVED................................................................................................. 95
17 POWER SUPPLY CONTROL ..................................................................... 96
PD, February 2012, Rev 4.0
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WOLFSON [ WOLFSON MICROELECTRONICS PLC ]
