AS3658
Data Sheet Confidential - Applications
Table of Contents
1 General Description ..............................................................................................................................1
2 Key Features .........................................................................................................................................1
3 Applications ...........................................................................................................................................2
4 Pin Assignments ...................................................................................................................................6
4.1 Pin Description ...............................................................................................................................................7
5 Absolute Maximum ratings ..................................................................................................................12
6 Electrical Characteristics .....................................................................................................................13
7 Typical Operating Characteristics .......................................................................................................14
8 Detailed Description-Power Management Functions ..........................................................................15
8.1 Step Up DC/DC Converters .........................................................................................................................15
8.2 Current Sinks ...............................................................................................................................................25
8.3 General Purpose Input / Output (CURR1_GPIO1 … CURR4_GPIO4) .......................................................30
8.4 Backup Battery Charger ..............................................................................................................................38
8.5 Smooth switchover Power Management Overview .....................................................................................41
8.6 Battery switch SINT (Vsupply, Battery) ........................................................................................................42
8.7 External Step Down/Linear Charger ............................................................................................................44
8.8 USB Charger ...............................................................................................................................................48
8.9 Battery Charge Controller ............................................................................................................................51
8.10 Charger supervision functions ...................................................................................................................63
8.11 Step Down DC/DC Converters ...................................................................................................................67
8.12 Low Dropout Regulators (LDO) .................................................................................................................78
8.13 5V Charge Pump .......................................................................................................................................85
9 Detailed Description- Audio Functions ................................................................................................87
9.1 Audio Paths .................................................................................................................................................87
9.2 Common mode voltage generation of HP_CM, LINE_CM ...........................................................................89
9.3 Audio Setup Registers .................................................................................................................................90
9.4 ADC, DAC and Digital Audio Input ...............................................................................................................91
9.5 I2S master mode and PCM Mode ...............................................................................................................95
9.6 Line Input .....................................................................................................................................................98
9.7 Five Band Equalizer ....................................................................................................................................99
9.8 Microphone Input ......................................................................................................................................105
9.9 Audio Output Mixer ....................................................................................................................................108
9.10 Line Output .............................................................................................................................................109
9.11 Headphone Output ...................................................................................................................................112
9.12 SPDIF output ...........................................................................................................................................115
10 Detailed Description - System Functions ........................................................................................116
10.1 2C Serial Interface ...................................................................................................................................116
10.2 Reset generator and XON-Key ................................................................................................................118
10.3 Interrupt Controller ...................................................................................................................................124
10.4 Startup ......................................................................................................................................................129
10.5 Protection Functions ................................................................................................................................134
10.6 Watchdog ................................................................................................................................................135
10.7 General Purpose 10 Bit ADC ...................................................................................................................136
10.8 Internal References (V, I, fclk) ..................................................................................................................139
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