WM8351CGEB/RV WOLFSON [Wolfson Microelectronics plc], WM8351CGEB/RV Datasheet - Page 6

• Manufacturer Part Number: WM8351CGEB/RV
• Manufacturer: WOLFSON [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
13.12.2
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
16.2.5
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
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
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
INTERRUPTS AND FAULT PROTECTION ....................................................................... 150
PD, April 2012, Rev 4.5
Production Data
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