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AS3542 3v2
Data Sheet, Strictly Confidential - A p p l i c a t i o n s
Contents
1 General Description ............................................................................................................................1
2 Key Features
.......................................................................................................................................1
3 Applications
........................................................................................................................................2
4 Pinout ...................................................................................................................................................6
4.1 Pin Assignment
..............................................................................................................................................6
4.2 Pin Description
...............................................................................................................................................6
5 Absolute Maximum Ratings ...............................................................................................................9
6 Electrical Characteristics
................................................................................................................. 11
6.1 Audio Specification
......................................................................................................................................13
7 Typical Operating Characteristics ...................................................................................................14
8 Detailed Description - Audio Functions ..........................................................................................15
8.1 Audio Line Input
...........................................................................................................................................15
8.2 Microphone Input
.........................................................................................................................................16
8.3 Line Output
..................................................................................................................................................18
8.4 Headphone Output
.......................................................................................................................................19
8.5 DAC, ADC and I2S Digital Audio Interface
..................................................................................................22
8.6 Audio Output Mixer
......................................................................................................................................25
8.7 2-Wire-Serial Control Interface
....................................................................................................................26
9 Detailed Description - Power Management Functions
..................................................................29
9.1 Low Drop Out Regulators
............................................................................................................................29
9.2 DCDC Step-Down Converter (2x)
................................................................................................................32
9.3 15V Step-Up DCDC Converter
....................................................................................................................36
9.4 Charger
........................................................................................................................................................38
9.5 Battery Switch
..............................................................................................................................................41
10 Detailed Description - SYSTEM Functions
...................................................................................42
10.1 SYSTEM
....................................................................................................................................................42
10.2 Hibernation
................................................................................................................................................44
10.3 Supervisor
..................................................................................................................................................45
10.4 Interrupt Generation
...................................................................................................................................45
10.5 Real Time Clock
.........................................................................................................................................47
10.6 10-Bit ADC
.................................................................................................................................................47
10.7 GPIO Pins
..................................................................................................................................................48
10.8 12-24MHz Oscillator
..................................................................................................................................49
10.9 Unique ID Code (64 bit OTP ROM)
...........................................................................................................49
11 Register Definition
..........................................................................................................................50
12 Application Information ..................................................................................................................82
13 Package Drawings and Markings
..................................................................................................83
14 Ordering Information
......................................................................................................................85