CM103+ C-Media Electronics, Inc., CM103+ Datasheet - Page 5

• Manufacturer Part Number: CM103+
• Description: 16-Bit Stereo USB Audio Controller
• Manufacturer: C-Media Electronics, Inc.

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.
Date: 09/25/2005
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
USB Stereo Audio Chip for Digital Speakers Application
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Version: 1.01
CM103+