wm8352 Wolfson Microelectronics plc, wm8352 Datasheet - Page 6

• Manufacturer Part Number: wm8352
• Description: Wolfson Audioplus? Stereo Codec With Power Management
• Manufacturer: Wolfson Microelectronics plc

WM8352
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
13.12.2
13.12.3
13.12.4
13.12.5
13.12.6
13.12.7
POWER MANAGEMENT SUBSYSTEM....................................................108
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 ........................................................................146
15.2.1
15.2.2
15.2.3
CURRENT SINKS (LED DRIVERS) ..........................................................149
16.2.1
16.2.2
16.2.3
16.2.4
16.2.5
GENERAL DESCRIPTION ........................................................................... 108
POWER MANAGEMENT OPERATING STATES ......................................... 108
POWER SEQUENCING AND CONTROL .................................................... 110
DEVELOPMENT MODE ............................................................................... 114
CUSTOM MODES ........................................................................................ 119
CONFIGURING THE DC-DC CONVERTERS .............................................. 128
CONFIGURING THE LDO REGULATORS .................................................. 137
DC-DC CONVERTER OPERATION ............................................................. 142
LDO REGULATOR OPERATION ................................................................. 145
GENERAL DESCRIPTION ........................................................................... 146
CONFIGURING THE CURRENT LIMIT SWITCH......................................... 146
GENERAL DESCRIPTION ........................................................................... 149
CONSTANT-CURRENT SINKS.................................................................... 149
HIBERNATE STATE SELECTION ..................................................................................... 109
STARTUP .......................................................................................................................... 110
POWER-UP SEQUENCING .............................................................................................. 111
SHUTDOWN...................................................................................................................... 111
POWER CYCLING ............................................................................................................ 112
REGISTER RESET ............................................................................................................ 112
RESET SIGNALS............................................................................................................... 113
CONTROL INTERFACE REDIRECTION........................................................................... 114
STARTING UP IN DEVELOPMENT MODE ....................................................................... 115
CONFIGURING THE WM8352 IN DEVELOPMENT MODE .............................................. 117
CONFIGURATION MODE 01 ............................................................................................ 119
CONFIGURATION MODE 10 ............................................................................................ 122
CONFIGURATION MODE 11 ............................................................................................ 125
DC-DC CONVERTER ENABLE ......................................................................................... 128
CLOCKING ........................................................................................................................ 129
DC-DC BUCK (STEP-DOWN) CONVERTER CONTROL.................................................. 129
DC-DC BOOST (STEP-UP) CONVERTER CONTROL...................................................... 132
INTERRUPTS AND FAULT PROTECTION ....................................................................... 134
LDO REGULATOR ENABLE ............................................................................................. 137
LDO REGULATOR CONTROL .......................................................................................... 138
INTERRUPTS AND FAULT PROTECTION ....................................................................... 140
ADDITIONAL CONTROL FOR LDO1 ................................................................................ 141
OVERVIEW........................................................................................................................ 142
DC-DC STEP DOWN CONVERTERS ............................................................................... 143
DC-DC STEP UP CONVERTERS...................................................................................... 144
CURRENT LIMIT SWITCH ENABLE ................................................................................. 146
CURRENT LIMIT SWITCH BULK DETECTION CONTROL .............................................. 147
INTERRUPTS AND FAULT PROTECTION ....................................................................... 147
ENABLING THE SINK CURRENT ..................................................................................... 149
PROGRAMMING THE SINK CURRENT............................................................................ 150
FLASH MODE.................................................................................................................... 150
ON/OFF RAMP TIMING..................................................................................................... 152
INTERRUPTS AND FAULT PROTECTION ....................................................................... 152
MICROPHONE DETECTION ......................................................................................... 102
MID-RAIL REFERENCE (VMID) .................................................................................... 103
ANTI-POP CONTROL.................................................................................................... 104
UNUSED ANALOGUE INPUTS/OUTPUTS ................................................................... 105
ZERO CROSS TIMEOUT .............................................................................................. 107
INTERRUPTS AND FAULT PROTECTION ................................................................... 107
PD, June 2009, Rev 4.1
Production Data
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