wm8351 Wolfson Microelectronics plc, wm8351 Datasheet - Page 6

• Manufacturer Part Number: wm8351
• Description: Wolfson Audioplus? Stereo Codec With Power Management
• Manufacturer: Wolfson Microelectronics plc

WM8351
14
15
16
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14.1
14.2
14.3
14.4
14.5
14.6
14.7
14.8
14.9
15.1
15.2
16.1
16.2
13.12.1
13.12.2
13.12.3
13.12.4
13.12.5
13.12.6
13.12.7
POWER MANAGEMENT SUBSYSTEM....................................................106
14.2.1
14.3.1
14.3.2
14.3.3
14.3.4
14.3.5
14.3.6
14.4.1
14.4.2
14.4.3
14.5.1
14.5.2
14.5.3
14.6.1
14.6.2
14.6.3
14.6.4
14.6.5
14.7.1
14.7.2
14.7.3
14.7.4
14.8.1
14.8.2
14.8.3
CURRENT LIMIT SWITCH ........................................................................144
15.2.1
15.2.2
15.2.3
CURRENT SINKS (LED DRIVERS) ..........................................................147
16.2.1
16.2.2
16.2.3
16.2.4
GENERAL DESCRIPTION ........................................................................... 106
POWER MANAGEMENT OPERATING STATES ......................................... 106
POWER SEQUENCING AND CONTROL .................................................... 108
DEVELOPMENT MODE ............................................................................... 112
CUSTOM MODES ........................................................................................ 117
CONFIGURING THE DC-DC CONVERTERS .............................................. 127
CONFIGURING THE LDO REGULATORS .................................................. 135
DC-DC CONVERTER OPERATION ............................................................. 140
LDO REGULATOR OPERATION ................................................................. 143
GENERAL DESCRIPTION ........................................................................... 144
CONFIGURING THE CURRENT LIMIT SWITCH......................................... 144
GENERAL DESCRIPTION ........................................................................... 147
CONSTANT-CURRENT SINK ...................................................................... 147
HIBERNATE STATE SELECTION ..................................................................................... 107
STARTUP .......................................................................................................................... 108
POWER-UP SEQUENCING .............................................................................................. 109
SHUTDOWN...................................................................................................................... 109
POWER CYCLING ............................................................................................................ 110
REGISTER RESET ............................................................................................................ 110
RESET SIGNALS............................................................................................................... 111
CONTROL INTERFACE REDIRECTION........................................................................... 112
STARTING UP IN DEVELOPMENT MODE ....................................................................... 113
CONFIGURING THE WM8351 IN DEVELOPMENT MODE .............................................. 114
CONFIGURATION MODE 01 ............................................................................................ 118
CONFIGURATION MODE 10 ............................................................................................ 121
CONFIGURATION MODE 11 ............................................................................................ 124
DC-DC CONVERTER ENABLE ......................................................................................... 127
CLOCKING ........................................................................................................................ 127
DC-DC BUCK (STEP-DOWN) CONVERTER CONTROL.................................................. 128
DC-DC BOOST (STEP-UP) CONVERTER CONTROL...................................................... 131
INTERRUPTS AND FAULT PROTECTION ....................................................................... 133
LDO REGULATOR ENABLE ............................................................................................. 135
LDO REGULATOR CONTROL .......................................................................................... 136
INTERRUPTS AND FAULT PROTECTION ....................................................................... 138
ADDITIONAL CONTROL FOR LDO1 ................................................................................ 139
OVERVIEW........................................................................................................................ 140
DC-DC STEP DOWN CONVERTERS ............................................................................... 141
DC-DC STEP UP CONVERTER........................................................................................ 142
CURRENT LIMIT SWITCH ENABLE ................................................................................. 144
CURRENT LIMIT SWITCH BULK DETECTION CONTROL .............................................. 145
INTERRUPTS AND FAULT PROTECTION ....................................................................... 145
ENABLING THE SINK CURRENT ..................................................................................... 147
PROGRAMMING THE SINK CURRENT............................................................................ 147
FLASH MODE.................................................................................................................... 148
ON/OFF RAMP TIMING..................................................................................................... 150
HEADPHONE JACK DETECT ......................................................................................... 99
MICROPHONE DETECTION ......................................................................................... 100
MID-RAIL REFERENCE (VMID) .................................................................................... 101
ANTI-POP CONTROL.................................................................................................... 102
UNUSED ANALOGUE INPUTS/OUTPUTS ................................................................... 103
ZERO CROSS TIMEOUT .............................................................................................. 105
INTERRUPTS AND FAULT PROTECTION ................................................................... 105
PD, June 2009, Rev 4.1
Production Data
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