CM102S+ - C-Media Electronics, Inc.

Best USB Audio Single Chip for PC Speakers Solution

CM102-A+/102S+

USB 2CH Audio Controller for Speaker

Datasheet

Version 1.01

C-MEDIA ELECTRONICS INC.

TEL: 886-2-8773-1100 FAX: 886-2-8773-2211

6F, 100, Sec. 4, Civil Boulevard, Taipei, Taiwan 106, R.O.C.

For detailed product information, please contact sales@cmedia.com.tw

CM102-A+/102S+

USB Stereo Audio Chip for Speaker Integrated

Date: 09/25/2005 Version: 1.01

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NOTICES

THIS DOCUMENT IS PROVIDED “AS IS” WITH NO WARRANTIES WHAT SO EVER,

INCLUDING ANY WARRANTY OF MERCHANT ABILITY, NONINFRINGEMENT, FITNESS FOR

ANY PARTICULAR PURPOSE, OR ANY WARRANTY OTHERWISE ARISING OUT OF ANY

PROPOSAL, DOCUMENT OR SAMPLE.

TRANSMITTED IN ANY FORM OR BY ANY MEANS, ELECTRONIC OR MECHANICAL,

INCLUDING INFORMATION STORAGE AND RETRIEVAL SYSTEMS, WITHOUT

PERMISSION IN WRITING FROM C-MEDIA ELECTRONICS, INC.

UCOPYRIGHT

icons, images, audio clips, digital downloads, data compilations, and software, is either the

exclusive property of C-Media Electronics Inc., its affiliates (collectively, "C-Media"), its content

suppliers, or its licensors and protected by Republic of China and international copyright laws.

UTRADEMARKS

C-Media, the C-Media Logo, Xear 3D, Xear 3D Logo, Speaker Shifter, Smart Jack, and Smart

Audio Jack are trademarks of C-Media Electronics Inc. in Republic of China and/or other

countries. All other brand and product names listed are trademarks or registered trademarks of

their respective holders and are hereby recognized as such.

*C-Media reserves the right to modify the specifications without further notice*

CM102-A+/102S+

USB Stereo Audio Chip for Speaker Integrated

Date: 09/25/2005 Version: 1.01

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TABLE OF CONTENTS

1. DESCRIPTIONS AND OVERVIEW 5

2. FEATURES 6

3. PIN/SIGNAL DESCRIPTIONS 7

3.1 PIN ASSIGNMENT BY PIN NUMBER 7

3.2 PIN-OUT DIAGRAM 7

3.3 PIN SIGNAL DESCRIPTIONS 8

4. BLOCK DIAGRAM 10

5. ORDERING INFORMATION 11

6. FUNCTION DESCRIPTIONS 12

6.1 USB INTERFACE 12

6.1.1 DEVICE DESCRIPTOR 12

6.1.2 CONFIGURATION DESCRIPTOR 13

6.1.3 USB AUDIO TOPOLOGY DIAGRAM 13

6.2 DYNAMIC RANGE CONTROL (DRC) 14

7. ELECTRICAL CHARACTERISTICS 15

7.1 ABSOLUTE MAXIMUM RATING 15

7.2 OPERATION CONDITIONS 15

7.3 SPERKER IMPEDANCE V.S. OUTPUT POWER (PER CHANNEL) 16

7.4 AUDIO PERFORMANCE 16

8. AUDIO PERFORMANCE CURVES 18

8.1 FREQUENCY RESPONSE (10K OHM LOADING) 18

8.1.1 FREQUENCY RESPONSE @ 44.1 KS/SEC 18

CM102-A+/102S+

USB Stereo Audio Chip for Speaker Integrated

Date: 09/25/2005 Version: 1.01

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8.1.2 FREQUENCY RESPONSE @ 48 KS/SEC 18

8.2 PASSBAND RIPPLE (10K OHM LOADING) 19

8.2.1 PASSBAND RIPPLE @ 44.1 KS/SEC 19

8.2.2 PASSBAND RIPPLE @ 48 KS/SEC 19

9. REFERENCE APPLICATION CIRCUIT 20

10. REFERENCE 20

CM102-A+/102S+

USB Stereo Audio Chip for Speaker Integrated

Date: 09/25/2005 Version: 1.01

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1. DESCRIPTIONS AND OVERVIEW

CM102-A+/102S+ series is a highly integrated single chip for USB stereo speakers application.

Minimum external components are needed for building an USB speaker system, which makes

CM102-A+/102S+ a simple and very cost-effective solution. Since no driver is necessary for

audio playback on all major OS. CM102-A+/102S+ provides a truly plug-and-play feature for

external digital audio playback.

For energy saving, USB suspend mode and resume is supported by CM102-A+/102S+. With

power amplifier enable pin and volume control VR input pin, a traditional speaker front panel

design can be built. This new single chip not only support 44.1KHz and 48KHz sampling rate

playback but also with X2 modulation for hi-frequency quality. Better yet, simplify anti-pop noise

solution was embedded on chip for general pop noise issues. All of the functions have been

approved by USB IF certification program. More flexible and customized design is possible with

GPIO pin, which is accessible by USB vendor specific request.

This one chip solution not only embedded USB transceiver, ADC, DAC component but also

integrated digital control power amplifier function for USB digital sound application. The Dynamic

Range Control function can support high efficiency volume output to get loudness sound effect

similar D class amplifier capability. Vender can just using single chip to saving external amplifier

component and getting a better listen experience when listen to a music source with wide

dynamic range.

Moreover, customers can use C-Media USB Audio Driver with Xear 3D functions to show up

digital speaker features and upgrade PC multi-media stereo function to be a CE like devices.

Xear 3D can support 10 band Equalizer, EnvironmentFX sound effects and virtual 7.1CH

speaker shifter. This driver is optional for free bundle.

Best USB Audio Chip for Digital Stereo Speakers Solution

CM102-A+/102S+

USB Stereo Audio Chip for Speaker Integrated

Date: 09/25/2005 Version: 1.01

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2. FEATURES

 USB 2.0 Full Speed Compatible and USB IF Certification

 USB audio device class specification v1.0 Compatible

 USB bus powered 500mA operation with suspend mode support

 USB audio function topology has 1 input terminal, 1 output terminal, and 1 feature unit

 Embedded high performance 16 bit stereo audio DAC

 Embedded Digital Control Power Amplifier for Speaker Driving

 Embedded power on reset block and Power amplifier enable / disable control pin

 Embedded X2 Modulation for Higher Audio Quality

 Embedded Anti-Pop Circuit with Internal Feedback Structure

 Embedded 5V to 3.3V Regulator with Voltage Level Detector for Single 5V External

Power Supply

 Alternate zero bandwidth setting for releasing bandwidth on USB bus during inactive

operation

 Single 12MHz crystal input with on-chip PLL and embedded USB transceiver

 Support Dynamic Range Control (DRC) Feature to Provide a Better Listen Experience

 Volume control input with simple external VR circuit

 Isochroous transfer using adaptive synchronization with internal PLL

 High performance 16-Bit St ereo, 48 / 44.1 KHz Sampling Rate for Audio Playback

 3.3V IO with 5V tolerance; 3.3V core logics design

 GPIO pin for application specific usage

 Support S/PDIF output interface

 LED Indicator Pin During Playback

 Compatible with Win 98SE / Win ME / Win 2000 / Win XP, and Mac OS 9 / OS X

without additional driver

 USB Software Drive Xear 3D Sound Technology With HRTF 3D, EAXTM, Speake

r

Shifter and Virtual 7.1CH effects for free bundle

 Compact 18 pin PDIP and SOP package

CM102-A+/102S+

USB Stereo Audio Chip for Speaker Integrated

Date: 09/25/2005 Version: 1.01

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3. PIN/SIGNAL DESCRIPTIONS

3.1 PIN ASSIGNMENT BY PIN NUMBER

Pin # Signal Name Pin # Signal Name

1 PAEN 10 TEST

2 GPIO 11 VREF

3 XO 12 VOLADJ

4 XI 13 AVDD

5 DVDD5V 14 LOL

6 REGV 15 LOR

7 USBDP 16 AVSS

8 USBDM 17 SPDIFO

9 DVSS 18 PDSW

3.2 PIN-OUT DIAGRAM

CM102-A+/102S+

USB Stereo Audio Chip for Speaker Integrated

Date: 09/25/2005 Version: 1.01

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3.3 PIN SIGNAL DESCRIPTIONS

Pin # Symbol Type Description

1 PAEN DI, ST

Power Amplifier Control Input, Connect to a Switch or

Pull-High in Normal Operation.

H: Enable Power Amplifier (Normal Mode)

L: Disable Power Amplifier

2 GPIO DIO, 8mA, ST,

SR, PD GPIO Pin, Controlled via Vender Specific Command

3 XO AO Output Pin for 12MHz Oscillator

4 XI AI Input Pin for 12MHz Oscillator

5 DVDD5V P 5V Power Supply

6 REGV AO Regulator output 3.3v

7 USBDP AIO USB Data D+

8 USBDM AIO USB Data D-

9 DVSS P Digital Ground

10 TEST DI, ST, PD Test Mode Select Pin, Pull-Down in normal Operation

11 VREF AO

Connecting to External Decoupling Capacitor for

Embedded Bandgap Circuit; 2.25V Output

12 VOLADJ AI

Analog Volume Control Input from external VR circuit.

0 ~ 2.25V: +12 dB ~ 3 dB / mute

3.5 ~ 5V: 0 dB

13 AVDD P 5V Power Supply for Analog Circuit

14 LOL AO Line Out Left Channel

15 LOR AO Line Out Right Channel

CM102-A+/102S+

USB Stereo Audio Chip for Speaker Integrated

Date: 09/25/2005 Version: 1.01

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16 AVSS P Analog Ground

17 SPDIFO

DO, 8mA, SR S/PDIF Data Output

18 PDSW

DO, 8mA, SR

Power Down Switch Control Signal Output

1: Normal Mode

0: Power Down Mode (Suspend Mode)

*NoteU:DI / DO / DIO – Digital Input / Output / Bi-Directional Pad

AI / AO / AIO – Analog Input / Output / Bi-Directional Pad

P – Power Pin

SR – Slew Rate Control

ST – Schmitt Trigger

PD / PU – Pull Down / Pull Up

5VT – 5 Volt Tolerant (3.3V Pad)

CM102-A+/102S+

USB Stereo Audio Chip for Speaker Integrated

Date: 09/25/2005 Version: 1.01

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4. BLOCK DIAGRAM

Block Diagram Of CM102-A+/102S+

CM102-A+/102S+

USB Stereo Audio Chip for Speaker Integrated

Date: 09/25/2005 Version: 1.01

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5. ORDERING INFORMATION

Model Number Package Operating Ambient

Temperature Supply Range

18-Pin PDIP 0 o C to +70 o C DVdd = 5V, AVdd = 5V

CM102-A+/102S+ 18-Pin SOP 0 o C to +70 o C DVdd = 5V, AVdd = 5V

Outline of Dimensions Dimensions shown in inches and (mm)

18- Plastic dual-in-line packaging (PDIP)

18- Pin SOP

Mechanical Dimension of CM102-A+

Mechanical Dimension of CM102S+

CM102-A+/102S+

USB Stereo Audio Chip for Speaker Integrated

Date: 09/25/2005 Version: 1.01

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6. FUNCTION DESCRIPTIONS

6.1 USB INTERFACE

6.1.1 DEVICE DESCRIPTOR

Offset Field Size Value

(Hex) Description

0 bLength 1 12

Total 18 Bytes

1 bDescriptorType 1 01

Device Descriptor

2 bcdUSB 2 0110

USB 1.1 compliant.

4 bDeviceClass 1 00

5 bDeviceSubClass 1 00

6 bDeviceProtocol 1 00

7 bMaxPacketSize0 1 08

Endpoint Zero Size = 8 bytes

8 idVendor 2 0D8C

Vendor ID

10 idProduct 2 0103

Product ID

12 bcdDevice 2 0010

Device Release Number

14 iManufacturer

1 01

Index of string descriptor describing

manufacturer -> “C-Media INC.”

15 iProduct

1 02

Index of string descriptor describing

product -> "C-Media USB Audio "

16 iSerialNumber

1 00

Index of string descriptor describing the

device’s serial number

17 bNumConfigurations 1 01 Configurations number = 1

CM102-A+/102S+

USB Stereo Audio Chip for Speaker Integrated

Date: 09/25/2005 Version: 1.01

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6.1.2 CONFIGURATION DESCRIPTOR

Offset Field Size Value

(Hex) Description

0 bLength 1 09

Total 9 Bytes

1 bDescriptorType 1 02

Configuration Descriptor

2 wTotalLength

2 008D

Total length of data returned for this

configuration.

4 bNumInterfaces

1 03

Number of interfaces supported by this

Configuration.

5 bConfigurationValue 1 01

6 iConfiguration 1 00

7 bmAttributes 1 80

Self-powered without Remote Wakeup

8 bMaxPower

2 FA

Maximum power consumption of the

USB. 0xFA=500 mA

6.1.3 USB AUDIO TOPOLOGY DIAGRAM

USB streaming

ID = 01 Feature Unit

(Volume) (Mute)

ID = 0D

Speaker

ID = 03

CM102-A+/102S+

USB Stereo Audio Chip for Speaker Integrated

Date: 09/25/2005 Version: 1.01

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6.2 DYNAMIC RANGE CONTROL (DRC)

CM102-A+/102S+ include a new feature called Dynamic Range Control (DRC), and with a

default ON setting (Users can still turn it off within the Windows audio advance control

panel)

Dynamic range is defined as the difference, in decibels (dB), between the loudest and

quietest sounds in any particular piece of audio content. Classical music is a good example,

with ranges from piano (soft) to forte to FFF (for extremely loud). Movies also typically have

a wide dynamic range, which may cause you to have to turn the volume up and down as

scenes change. For example, when watching a movie at home, you may be forced to turn

up volume to hear the dialog in a quiet scene, and then quickly turn it down again during a

car chase scene that follows. In this way, there may be times in a home theater environment

when it would be useful to be able to control the dynamic range.

With Dynamic Range Control enabled, the full dynamic range (A) of the program is reduced

(B).

+10dB

0dB

-10dB

-20dB

-30dB

-40dB

-50dB

-60dB

+20dB

Lower Levels Raised

Peaks Reduced

A

B

DRC

Peaks Reduced

Lower Levels Raised

Peaks Clipped

Lower Levels

hard to heard

A

B

CM102-A+/102S+

USB Stereo Audio Chip for Speaker Integrated

Date: 09/25/2005 Version: 1.01

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7. ELECTRICAL CHARACTERISTICS

7.1 ABSOLUTE MAXIMUM RATING

Symbol Parameter Value Unit

Dvmin Min Digital Supply Voltage – 0.3 V

Dvmax Max Digital Supply Voltage + 6 V

Avmin Min Analog Supply Voltage – 0.3 V

Avmax Max Analog Supply Voltage + 6 V

Dvinout Voltage on any Digital Input or Output Pin –0.3 to +5.5 V

A vinout Voltage on any Analog Input or Output Pin –0.3 to +5.5 V

TBstgB Storage Temperature Range -40 to +125 P

0

PC

ESD (HBM) ESD Human Body Mode 2000 V

ESD (MM) ESD Machine Mode 200 V

Latchup Latch Up Test 200 mA

7.2 OPERATION CONDITIONS

Min Typ Max Unit

Analog Supply Voltage 4.5 5.0 5.5 V

Digital Supply Voltage 4.5 5.0 5.5 V

Total Power Consumption - - 500 mA

Suspend Mode Power

Consumption - - 320 uA

Operating ambient

temperature 0 - 70

P

o

PC

CM102-A+/102S+

USB Stereo Audio Chip for Speaker Integrated

Date: 09/25/2005 Version: 1.01

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7.3 SPERKER IMPEDANCE VS. OUTPUT POWER (PER CHANNEL)

Loading (Ohm)

Items 4 Ohm 8 Ohm 32 Ohm 10K Ohm

Vpp 3.14 3.4 3.635 3.722

Vrms 1.11 1.202 1.285 1.316

W(rms/sin wave) 308 mW 181 mW 52 mW 0.17 mW

W(rms/square wave) 616 mW 361 mW 103 mW 0.35 mW

W(PMPO) 2460 mW 1450 mW 410 mW 1 mW

*Note1: Test Condition @ 25oC, 5 Volt +- 10%

*Note2: Typical Output with THD+N < 1% ; Maximal Output with THD+N < 10%

7.4 AUDIO PERFORMANCE

Min Typ Max Unit

Resolution -- 16 -- Bits

Frequency response @ 48KHz 20 -- 20K Hz

Frequency Response @ 44.1KHz 20 -- 20K Hz

Passband Ripple @ 48 KHz 40 -- 9.6K Hz

Passband Ripple @ 44.1 KHz 40 -- 8.8K Hz

DAC (10K Ohm Loading)

SNR -- 97.75 -- dB

Dynamic Range -- 96.27 -- dB

THD + N -- -67.97 -- dB

Output Voltage (rms) - 1.316 - Vrms

CM102-A+/102S+

USB Stereo Audio Chip for Speaker Integrated

Date: 09/25/2005 Version: 1.01

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DAC (32 Ohm Loading)

SNR -- 97.68 -- dB

Dynamic Range -- 95.99 -- dB

THD + N -- -57.82 -- dB

Output Voltage (rms) - 1.285 - Vrms

DAC (8 Ohm Loading)

SNR -- 97.67 -- dB

Dynamic Range -- 96.03 -- dB

THD + N -- -53.28 -- dB

Output Voltage (rms) - 1.202 - Vrms

DAC (4 Ohm Loading)

SNR -- 97.45 -- dB

Dynamic Range -- 95.89 -- dB

THD + N -- -52.76 -- dB

Output Voltage (rms) - 1.11 - Vrms

CM102-A+/102S+

USB Stereo Audio Chip for Speaker Integrated

Date: 09/25/2005 Version: 1.01

- 18 -

8. AUDIO PERFORMANCE CURVES

8.1 FREQUENCY RESPONSE (10K OHM LOADING)

8.1.1FREQUENCY RESPONSE @ 44.1 KS/SEC

C-MEDIA 05/31/05 14:10:33Digital Playbac k (PC-D-A) f or Line Output Frequency

Response

WL-Multitone-44k.at2c

ColorSweep Trace Line Style Thick Data Axis Comment

1 1 Cyan Solid 3 Fasttest.Ch.1 Ampl!Normalize Left

1 2 Yellow Sol id 3 Fasttest.Ch.2 Ampl!Normalize Left

-6

+1

-5

-4

-3

-2

-1

+0

d

B

r

A

20 10k50 100 200 500 1k 2k 5k

Hz

8.1.2 FREQUENCY RESPONSE @ 48 ks/sec

C-MEDIA 05/31/05 14:07:22Digital Playback (PC-D-A) for Line Output Frequency

Response

WL-Multitone-48k.at2c

ColorSweep T race Line S tyle Thick Data Axis Comment

1 1 Cyan Solid 3 Fasttest.Ch.1 Ampl!Normalize Left

1 2 Yellow Sol id 3 Fasttest.Ch.2 Ampl!Normalize Left

-6

+1

-5

-4

-3

-2

-1

+0

d

B

r

A

30 10k50 100 200 500 1k 2k 5k

Hz

CM102-A+/102S+

USB Stereo Audio Chip for Speaker Integrated

Date: 09/25/2005 Version: 1.01

- 19 -

8.2 PASSBAND RIPPLE (10K OHM LOADING)

8.2.1 PASSBAND RIPPLE @ 44.1 ks/sec

C-ME DIA 05/31/05 14:11:07Digital Playback (PC-D-A) for Line Output Passband

Ripple @44.1ks/sec

WL-PassbandRipple-M44k.at2c

ColorSweep Trace Line Style Thick Data Axis Comment

1 1 Cyan Solid 3 Fasttes t.Ch.1 Ampl!Normalize Left

1 2 Yellow Solid 3 Fasttest.Ch.2 Ampl!Normalize Left

-0.4

+0.4

-0.2

-0

+0.2

d

B

40 8k50 100 200 500 1k 2k 5k

Hz

8.2.2 PASSBAND RIPPLE @ 48 ks/sec

C-MEDIA 05/31/05 14:09:08Digital Playback (PC-D-A) for Line Output Passband

Ripple @48ks/sec

WL-PassbandRipple-M48k.at2c

ColorSweep Trace Line Style Thick Data Axis Comment

1 1 Cyan Solid 3 Fasttest.Ch.1 Ampl!Normalize Left

1 2 Yellow Solid 3 Fasttest.C h.2 Ampl!Normalize Le ft

-0.4

+0.4

-0.2

-0

+0.2

d

B

40 9k50 100 200 500 1k 2k 5k

Hz

CM102-A+/102S+

USB Stereo Audio Chip for Speaker Integrated

Date: 09/25/2005 Version: 1.01

- 20 -

9. REFERENCE APPLICATION CIRCUIT

CM102-A+/102S+

USB Stereo Audio Chip for Speaker Integrated

Date: 09/25/2005 Version: 1.01

- 21 -

10. REFERENCE

♦ Universal Serial Bus Specification, Version 2.0

♦ Universal Serial Bus Device Class Definition for Audio Devices, Version 1.0.

♦ Universal Serial Bus Device Class Definition for Human Interface Devices (HID), Version

1.11

－End of Specifications－

C-MEDIA ELECTRONICS INC.

6F., 100, Sec. 4, Civil Boulevard, Taipei, Taiwan 106 R.O.C.

TEL:886-2-8773-1100

FAX:886-2-8773-2211

E-mail：sales@cmedia.com.tw URL：http://www.cmedia.com.tw