The Best USB Audio Single Chip for
Stereo Digital Control Speakers Application
CM103+
16-Bit Stereo USB Audio Controller
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
TU
UT
CM103+
USB Stereo Audio Chip for Digital Speakers Application
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.
ALL RIGHTS RESERVED. NO PART OF THIS DOCUMENT MAY BE REPRODUCED OR
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.
U
COPYRIGHT
Copyright (c) 2005-2007 C-Media Electronics Inc.
All rights reserved. All content included on this document, such as text, graphics, logos,
button 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.
U
TRADEMARKS
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*
Date: 09/25/2005
-2-
Version: 1.01
CM103+
USB Stereo Audio Chip for Digital Speakers Application
TABLE OF CONTENTS
1. DESCRIPTIONS AND OVERVIEW
2. FEATURES
3. PIN DESCRIPTIONS
3.1
PIN ASSIGNMENT BY PIN NUMBER
3.2
PIN-OUT DIAGRAM
3.3
PIN SIGNAL DESCRIPTIONS
4. BLOCK DIAGRAM
5. ORDERING INFORMATION
6. FUNCTION DESCRIPTIONS
6.1
USB INTERFACE
6.1.1
6.1.2
6.1.3
DEVICE DESCRIPTOR
CONFIGURATION DESCRIPTOR
USB AUDIO TOPOLOGY DIAGRAM
5
5
7
7
7
8
11
12
13
13
13
14
14
15
16
16
16
18
19
19
19
20
20
Version: 1.01
-3-
6.2
EEPROM (93C46) CONTENT FORMAT
6.3
HID FEATURE
6.3.1
6.3.2
WHAT’S HID
HID DESCRIPTOR
6.4
DYNAMIC RANGE CONTROL (DRC)
7. ELECTRICAL CHARACTERISTICS
7.1
ABSOLUTE MAXIMUM RATING
7.2
OPERATION CONDITIONS
7.3
SPERKER IMPEDANCE VS. OUTPUT POWER CONSUMPTION
7.4
AUDIO PERFORMANCE
Date: 09/25/2005
CM103+
USB Stereo Audio Chip for Digital Speakers Application
8.
AUDIO PERFORMANCE CURVES
22
22
22
22
23
23
23
24
25
8.1
FREQUENCY RESPONSE (10K OHM LOADING)
8.1.1
8.1.2
FREQUENCY RESPONSE @ 44.1 KS/SEC
FREQUENCY RESPONSE @ 48 KS/SEC
8.2
PASSBAND RIPPLE (10K OHM LOADING)
8.2.1
8.2.2
PASSBAND RIPPLE @ 44.1 KS/SEC
PASSBAND RIPPLE @ 48 KS/SEC
9. REFERENCE APPLICATION CIRCUIT
10.
REFERENCE
Date: 09/25/2005
-4-
Version: 1.01
CM103+
USB Stereo Audio Chip for Digital Speakers Application
1. DESCRIPTIONS AND OVERVIEW
CM103+ is a highly integrated single chip for USB digital control speaker application. It is a
truly plug-and-play USB audio device and provided high quality digital sound playback. 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.
Minimum external components are needed for building a high-end 2CH USB speaker
system, which makes CM103+ a simple and very cost-effective solution. Since no driver is
necessary for audio playback on all major OS.
The innovation technology DRC feature was integrated on CM103+. This 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 listening experience when listen to a music source
with wide dynamic range.
Customers can use an EEPROM to define vendor specific VID / PID / Product String, and
even special hardware configuration. More flexible and customized design is possible with
GPIO pin, which is accessible by USB vendor specific request. For energy saving, USB
suspend mode and resume is supported by CM103+. With power amplifier enable pin and
volume control VR input pin, a traditional speaker front panel design can be built. Moreover,
CM103+ support USB standard HID Interface which provide Vol_up / Vol_dn / Play_mute
Buttons and Rotary Encoder for pure digital volume control.
2. FEATURES
USB 2.0 Full Speed Compatible and USB IF certification
USB Audio Devices Class Specification Ver1.0 Compatible
USB Bus Powered 500mA, without External Power Supply
High performance 16-Bit Stereo, 48 / 44.1 KHz Sampling Rate for Audio Playback
S/PDIF Output Interface
Embedded USB Transceiver
Embedded High Performance 16-Bit Audio DAC
Date: 09/25/2005
-5-
Version: 1.01
京公网安备 11010802033920号
Copyright © 2005-2026 EEWORLD.com.cn, Inc. All rights reserved
电子工程世界
