AMS AS3518 User guide

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AS3518 Application Note V0.1

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1 Key Features

• On chip DCDC Converter

• On chip step down charge pump

• 6 On-chip high performance voltage

regulators

• 18 Bit stereo DAC

• Stereo speaker audio amplifier

• Stereo Headphone audio amplifier

• Line output

• 1x Microphone input

• 3x Line input

• Audio Mixer

• 20 Bit stereo ADC

• Li-Io Charger

• 15V Back-light step up converter

• RTC

• 10 Bit ADC

2 Applications

• Audio front-end for cellular phones

• Stand alone MP3 player

• CD and DVD player

• PDAs

PREL

IMINARY APPLICATION

NOTE

AS3518

Eval Board V1.0

APPLICATION NOTE #01

CONFIDENTIAL

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3 Table of Contents

1 Key Features ___________________________________________________1

2 Applications ____________________________________________________1

3 Table of Contents _______________________________________________2

4 Revision Status _________________________________________________3

5 Demo kit contents _______________________________________________3

6 Getting started__________________________________________________4

6.1 AS3515 Demo Software________________________________

_____________ 4

7 Connector, Jumper and Device loactions ___________________________4

7.2 Configuration Jumper Overview ______________________________________ 5

7.2.1 J67 – Supply source _____________________________________________________6

7.2.2 J59 – Boost converter activation ___________________________________________6

7.2.3 J58 – Backlight booster mode _____________________________________________6

7.2.4 J60, J63 – Voltage controlled mode _________________________________________6

7.2.5 J32 – Power LED enable _________________________________________________6

7.2.6 J55, J56, J57 – FVDD supply ______________________________________________6

7.2.7 J61 – LDO supply _______________________________________________________6

7.2.8 J43 – RTC supply ____________________________________

___________________6

7.2.9 J15, J16, J17, J18 – Boot sequence ________________________________________6

7.2.10 J13, J23, J24 – Headphone power supply __________________________________6

7.2.11 J35, J71 – Microphone select ____________________________________________6

7.3 Voltage and Current Measurement Jumper Overview _____________________ 7

7.4 Audio Measurement Jumper Overview _________________________________ 8

7.5 J70 – Audio Test Interface___________________________________________ 8

7.6 J30 – I2S Interface_________________________________________________ 8

7.7 J31 – Audio Precision Interface_______________________________________ 9

7.8 J29 – I2C Interface ________________________________________________ 9

8 Application Board Schematic ___________________________________ 10

9 Layout _______________________________________________________ 14

9.9 Default Jumper Settings ___________________________________________ 16

10 Ordering information __________________________________________ 17

11 Copyright ____________________________________________________ 17

12 Contact Info __________________________________________________ 17

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4 Revision Status

AS3518 Datasheet Rev.: 0.5

AS3518 Application Note (this document) Rev.: 0.1

AS3518 Eval Board schematic Rev.: 1.0

AS3518 Eval Board layout Rev.: 1.0

AS3518 Software Version Rev.: 1.2.1

AS3518 Install Shield Rev.: 1.3

5 Demo kit contents

The available AS3515 application-kit contains the following parts:

• AS3518 Application Board

• USB-Interface Box for Windows Software control

• Demo Software Installation CD

• I2S Source Board

• USB A-MiniB cable

• Two ribbon cables

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6 Getting started

6.1 AS3518 Demo Software

No demo software available now, will be done when the software is available.

7 Connector, Jumper and Device locations

Listed below are the various connectors and jumpers.

Figure1: Connector and part locations TOP

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7.2 Configuration Jumper Overview

Jumper

Pin No Pin Name Function

1, 2 LiIon Source Eval board sourced via LiIon Battery J67

3, 4 Single Cell Source Eval board sourced via single cell battery (in conjunction with J59)

1, 2 Single Cell Source Boost converter active (in conjunction with J67) J59

2, 3 LiIon Source Boost converter inactive (in conjunction with J67)

1, 2 FB Select - voltage Backlight LED booster selected for voltage feedback

(in conjunction with J63 and J60)

J58

2, 3 FB Select – current Backlight LED booster selected for current feedback

J60 1, 2 FB via Z-Diode Backlight booster feedback via reference diode

J63 1, 2 FB via resistor Backlight booster feedback via resistor divider

J32 1, 2 Power LED enable Power LED enabled, disable for runtime measurements

J55 1, 2 DVDD for FVDD FVDD is sourced from DVDD

J56 1, 2 CVDD2 for FVDD FVDD is sourced from CVDD2

J57 1, 2 CVDD1 for FVDD FVDD is sourced from CVDD1

1, 2 LDO source CVDD2 LDO’s sourced via CVDD2 J61

2, 3 LDO source BVDD LDO’s sourced via BVDD

1, 2 RTC backup enable RTC supplied via backup capacitor C23 J43

2, 3 RTC backup disable RTC supplied via BVDD directly

J15 1, 2 Boot sequence select Selects the boot sequence

J16 1, 2 Boot sequence select Selects the boot sequence

J17 1, 2 Boot sequence select Selects the boot sequence

J18 1, 2 Boot sequence select Selects the boot sequence

J13 1, 2 HPH supply BVDD HPH amplifier supplied via BVDD

J23 1, 2 HPH supply AVDD HPH amplifier supplied via AVDD

J24 1, 2 HPH supply CVDD2 HPH amplifier supplied via CVDD2

J71 1, 2 MICN enable Enables the on board microphone (in conjunction with J35)

J35 1, 2 MICP enable Enables the on board microphone (in conjunction with J71)

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7.2.1 J67 – Supply source

The jumper J67 determines the power source of the eval board. Pins 1 – 2 short selects the LiIon battery, pins 3 – 4 short

selects the single cell battery. When single cell is selected the boost converter must be activated with J59

7.2.2 J59 – Boost converter activation

Jumper J59 activates the boost converter which is used to generate BVDD (3.6V) out of a single cell battery. Pin 1 – 2 short

activates the boost converter, pins 2 – 3 short deactivates the boost converter for a LiIon battery.

7.2.3 J58 – Backlight booster mode

The backlight booster supports current controlled mode for white LED backlight and voltage controlled mode for OLED displays.

Pins 1 – 2 short voltage mode is selected (there are two modes which are determined by J63 and J60), pins 2 – 3 short current

mode is selected.

7.2.4 J60, J63 – Voltage controlled mode

When the backlight booster is set to voltage controlled mode via J58, the exact mode is set by J60 and J63. When J60 is set,

the the feedback is controlled by a reference zener diode, the output voltage is the value of D11 plus 0.8V. Setting J63 selects

the feedback via a resistor divider. The output voltage is 0.8 x (1+ R36/R40). The selected output voltage must not be set to

more than 15V.

7.2.5 J32 – Power LED enable

When this jumper is set, the power LED is on, when the board is powered. When the jumper is open, the power LED is disabled,

this can be necessary when doing runtime measurements, because the LED draws about 5mA.

7.2.6 J55, J56, J57 – FVDD supply

These jumpers determine the power supply of FVDD, which is the supply of the ADC/DAC digital circuitry. The FVDD can be

sourced via BVDD (J55 set), CVDD1 (J57 set) or CVDD2 (J56 set).

7.2.7 J61 – LDO supply

The LDO’s have a separate supply pin. This pin can be switched to CVDD2 (pins 1, 2 short) or BVDD (pins 2, 3 short).

7.2.8 J43 – RTC supply

The RTC can be supplied direct through BVDD (pins 2, 3 short) or via a backup capacitor (pins 1, 2 short). Note that the backup

capacitor is not mounted by default.

7.2.9 J15, J16, J17, J18 – Boot sequence

The setting of these jumpers determine the sequencing and voltage of the power supplies (BVDD, CVDD1, CVDD2, PVDD1).

J15 set: BVDD @ 3.6V  PVDD1 @ 3.0V  CVDD2 @ 1.8V  CVDD1 @ 1.2V

J16 set: BVDD @ 3.6V  CVDD1 @ 1.2V  CVDD2 @ 1.8V  PVDD1 @ 3.0V

J17 set: BVDD @ 3.6V  CVDD2 @ 3.0V  PVDD1 @ 1.8V  CVDD1 @ 1.2V

J18 set: BVDD @ 3.6V  CVDD1 @ 1.2V  PVDD1 @ 1.8V  CVDD2 @ 2.8V

All open: BVDD @ 3.6V  CVDD2 @ 3.0V  CVDD1 @ 1.2V

7.2.10 J13, J23, J24 – Headphone power supply

The supply of the headphone amplifier is set with the jumpers J13 (BVDD), J23 (AVDD) or J24 (CVDD2)

7.2.11 J35, J71 – Microphone select

The on board microphone can be enabled when these jumpers are set.

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7.3 Voltage and Current Measurement Jumper Overview

Jumper

Pin No Pin Name Function

J49,

J41

1 – 3 PVSS Power ground

J48,

J40

1 – 3 DVSS Digital ground

J47,

J39

1 – 3 AVSS Analog ground

1 CVDD1 CVDD1 output voltage

2 CVDD2 CVDD2 output voltage

3 PVDD1 PVDD1 output voltage

4 PVDD2 PVDD2 output voltage

5 AVDD AVDD output voltage

6 DVDD DVDD output voltage

7 RVDD RVDD output voltage

8 DCDC15 Backlight booster output voltage

9 ISINK Backlight booster reference voltage

J69

10 BVDD3V Single cell booster output voltage

J68 1-10 GND Ground

J42 1, 2 I_CHG_CHGIN charger input current

J36 1, 2 I_CHG_USB USB jack input current

J38 1, 2 I_CHG_EXT External charger input current

J37 1, 2 I_CHG_DC Wall socket charger input current

J34 1, 2 I_CHGOUT charger output current to LiIon battery

J10 1, 2 I_Booster booster output current

J65 1, 2 I_BVDDL booster inductor current (default: shorted by R41)

J66 1, 2 I_DCDC15L backlight booster inductor current (default: shorted by R42)

J45 1, 2 I_L1 CVDD1 buck converter inductor current (default: shorted by R32)

J33 1, 2 I_CVDD1 CVDD1 buck converter output current

J44 1, 2 I_L2 CVDD2 buck converter inductor current (default: shorted by R37)

J28 1, 2 I_CVDD2 CVDD2 buck converter output current

J51 1, 2 I_PVDD1 PVDD1 LDO output current

J46 1, 2 I_PVDD2 PVDD2 LDO output current

J53 1, 2 I_DVDD DVDD LDO output current

J64 1, 2 I_AVDD AVDD LDO output current

J54 1, 2 I_RTC RTC input current

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7.4 Audio Measurement Jumper Overview

Jumper

Pin No Pin Name Function

1, 6 AVSS Audio Ground

2 HPH_R Headphone Output Right

3, 4 HPH_CM Headphone Common Mode Buffer Output

J7

5 HPH_L Headphone Output Left

1 LOUT_R Line Output Right

2, 3 AVSS Audio Ground

J2

4 LOUT_L Line Output Left

1 LIN1_R Line In 1 Right

2, 3 AVSS Audio Ground

J1

4 LIN1_L Line In 1 Left

1 LIN2_R Line In 2 Right

2, 3 AVSS Audio Ground

J3

4 LIN2_L Line In 2 Left

1 LIN3_R Line In 3 Right

2, 3 AVSS Audio Ground

J5

4 LIN3_L Line In 3 Left

7.5 J70 – Audio Test Interface

This is a connector for testing purpose, it’s intended to ease the procedure of testing.

Function Pin Number Function

Line In 1 Right 1 2 Headphone Right

Audio Ground 3 4 Headphone Left

Line In 1 Left 5 6 Headphone Common Mode Buffer

Line In 2 Right 7 8 Line Out Right

Audio Ground 9 10 Audio Ground

Line In 2 Left 11 12 Line Out Left

Line In 3 Right 13 14 Audio Ground

Audio Ground 15 16

Line In 3 Left 17 18

Microphone Plus (Mic supply)

Audio Ground 19 20 Microphone Minus

7.6 J30 – I2S Interface

This interface is used to connect the I2S bitstream source board.

Function Pin Number Function

PVDD1 1 2 DVDD

SDO 3 4 SDI

SCLK 5 6 LRCLK

Digital Ground 7 8 PWGD

CSCL 9 10 CSDA

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7.7 J31 – Audio Precision Interface

This Interface can be used with Audio Precision

Function Pin Number Function

1 2 SCLK

3 4 LRCLK

5 6 SDO

7 8 SDI

Digital Ground

9 10 PWGD

7.8 J29 – I2C Interface

This interface is used to connect the USB box for debugging purposes.

Function Pin Number Function

XRES 1 2 HBT

XIRQ 3 4 PWRUP

PWGD 5 6 CSCL

Digital Ground 7 8 CSDA

Q32K 9 10 Not connected

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8 Application Board Schematic

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9 Layout

Top Layer

Ground Plane Layer

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Power Supply Layer

Bottom Layer

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9.9 Default Jumper Settings

Please find below a list with the default jumper settings for AS3518 Eval Board.

Jumper Pin Name Function

J67 1, 2 LiIon battery enabled

J59 1, 2 Boost converter disabled

J58 2, 3 Current controlled mode for backlight booster enabled

J34 1, 2 Current measurement for charger output

J33 1, 2 Current measurement CVDD1

J20 1, 2 Current measurement CVDD2

J51 1, 2 Current measurement PVDD1

J46 1, 2 Current measurement PVDD2

J32 1, 2 Power LED enabled

J55 1, 2 DVDD supplies FVDD

J10 1, 2 Current measurement single cell booster

J53 1, 2 Current measurement DVDD

J37 1, 2 Current measurement DC input charger

J61 1, 2 CVDD2 supplies LDO’s

J43 2, 3 RTC supplied by BVDD

J16 1, 2 Boot sequence select (BVDD @ 3.6V  CVDD1 @ 1.2V  CVDD2 @ 1.8V  PVDD1 @ 3.0V)

J64 1, 2 Current measurement AVDD

J71 1, 2 On board mic enabled

J35 1, 2 On board mic enabled

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10 Ordering information

Devices sold by austriamicrosystems AG are covered by the warranty and patent identification provisions appearing in its Term

of Sale. austriamicrosystems AG makes no warranty, express, statutory, implied, or by description regarding the information set

forth herein or regarding the freedom of the described devices from patent infringement. austriamicrosystems AG reserves the

right to change specifications and prices at any time and without notice. Therefore, prior to designing this product into a system,

it is necessary to check with austriamicrosystems AG for current information. This product is intended for use in normal

commercial applications. Applications requiring extended temperature range, unusual environmental requirements, or high

reliability applications, such as military, medical life-support or life-sustaining equipment are specifically not recommended

without additional processing by austriamicrosystems AG for each application.

11 Copyright

Schloss Premstaetten, A-8141 Unterpremstaetten,

translated, stored, or used without the prior written consent of the copyright owner.

The information furnished here by austriamicrosystems AG is believed to be correct and accurate. However,

austriamicrosystems AG shall not be liable to recipient or any third party for any damages, including but not limited to personal

injury, property damage, loss of profits, loss of use, interruption of business or indirect, special, incidental or consequential

damages, of any kind, in connection with or arising out of the furnishing, performance or use of the technical data herein. No

obligation or liability to recipient or any third party shall arise or flow out of austriamicrosystems AG rendering of technical or

other services.

12 Contact Info

austriamicrosystems AG

Business Unit Communications

A 8141 Schloss Premstätten, Austria-EU

T. +43 (0) 3136 500-0

F. +43 (0) 3136 500-5692

info@austriamicrosystems.com

For local Sales Offices please see:

www.austriamicrosystems.com

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AMS AS3518 User guide

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