AS3658F-BCTP datasheet(5/158 Pages) AMSCO

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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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