CM102-A+/102S+
USB 2CH Audio Controller for Speaker
BLOCK DIAGRAM
DESCRIPTION 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. 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
DACS/PDIF output interface
? 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
Cmedia Agnet Tel 180******** QQ 791592110
Cmedia Agnet Tel 180******** QQ 791592110
TABLE OF CONTENTS
1Description and Overview (3)
2Features (3)
3Pin/Signal Description (5)
3.1Pin Assignment by Pin Number (5)
3.2Pin-Out Diagram (5)
3.3Pin Signal Description (6)
4Block Diagram (7)
5Ordering Information (8)
6Function Description (9)
6.1USB Interface (9)
8.2.1Device Descriptor (9)
8.2.2Configuration Descriptor (10)
8.2.3USB Audio Topology Diagram (10)
6.2Dynamic range control (DRC) (11)
7Electrical Characteristics (12)
7.1Absolute Maximum Rating (12)
7.2Operation Conditions (12)
7.3Speaker Impedance VS. Output Power (Per Channel) (13)
7.4Audio Performance (14)
8Audio Performance Curves (15)
8.1Frequency Response (10 ohm loading) (15)
8.1.1Frequency Response @ 44.1 ks/sec (15)
8.1.2Frequency Response @ 48 ks/sec (15)
8.2Passband Ripple (8 ohm loading) (16)
8.2.1Passband Ripple @ 44.1 ks/sec (16)
8.2.2Passband Ripple @ 48 ks/sec (16)
9Reference (17)
1Description 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.
2Features
?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 Stereo, 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 / Vista, and Mac OS X without additional driver ?USB Software Drive Xear 3D Sound Technology With Speaker Shifter and Virtual 7.1CH effects for free
bundle
?Compact 18 pin PDIP and SOP package
3Pin/Signal Description
3.1Pin Assignment by Pin Number
3.2 Pin-Out Diagram
3.3Pin Signal Description
*Note
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)
4Block Diagram
Block Diagram Of CM102-A+/102S+
5Ordering Information
Outline of Dimensions Dimensions shown in inches and (mm)
◆18- Plastic dual-in-line packaging (PDIP)
Mechanical Dimension of CM102-A+
◆18- Pin SOP
Mechanical Dimension of CM102S+
6Function Description
6.1USB Interface
6.1.1Device Descriptor
6.1.2 Configuration Descriptor
6.1.3 USB Audio Topology Diagram
USB streaming
ID = 01
Feature Unit (Volume) (Mute)
ID = 0D
Speaker ID = 03
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).
-60dB
+20dB
7Electrical Characteristics
7.1Absolute Maximum Rating
7.2Operation Conditions
7.3Speaker Impedance VS. Output Power (Per Channel)
*Note1: Test Condition @ 25o *C, 5 Volt +- 10%
Note2: Typical Output with THD+N < 1%; Maximal Output with THD+N < 10%
7.4Audio Performance
8 Audio Performance Curves
8.1 Frequency Response (10 ohm loading)
8.1.1 Frequency Response @ 44.1 ks/sec
8.1.2 Frequency Response @ 48 ks/sec
C-MEDIA
05/31/05 14:10:33
Digital Playback (PC-D-A) for Line Output Frequency
Response
WL-Multitone-44k.at2c
d B r A
20
10k
50
100
200
5001k 2k 5k Hz
C-MEDIA
05/31/05 14:07:22
Digital Playback (PC-D-A) for Line Output Frequency
Response
WL-Multitone-48k.at2c
d B r A
30
10k
50
100
200
500
1k 2k 5k Hz
8.2 Passband Ripple (8 ohm loading)
8.2.1 Passband Ripple @ 44.1 ks/sec
8.2.2 Passband Ripple @ 48 ks/sec
C-MEDIA
05/31/05 14:11:07
Digital Playback (PC-D-A) for Line Output Passband
Ripple @44.1ks/sec
WL-PassbandRipple-M44k.at2c
d B
40
8k
50
100
200
500
1k 2k 5k Hz
C-MEDIA
05/31/05 14:09:08
Digital Playback (PC-D-A) for Line Output Passband
Ripple @48ks/sec
WL-PassbandRipple-M48k.at2c
d B
409k
50
100
200
500
1k 2k 5k Hz
9Reference
?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.
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TEL:+886-2-8773-1100
FAX:+886-2-8773-2211
E-MAIL:sales@https://www.sodocs.net/doc/8811063700.html,
Disclaimer:
Information furnished by C-Media Electronics Inc. is believed to be accurate and reliable. However, no responsibility is assumed by C-Media Electronics Inc. for its use, nor for any infringements of patents or other rights of third parties that may result from its use. Specifications subject to change without notice. No license is granted by implication or otherwise under any patent or patent rights of C-Media. Trademark and registered trademark are the property of their respective owners.