CM103 查看數據表（PDF） - C-Media Electronics

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CM103

16-Bit Stereo USB Audio Controller

C-Media Electronics 

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

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Version: 1.01

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