DESCRIPTION

The CM6637 is a USB 2.0 high speed audio controller that complaints with USB Audio Device Class 2.0.The CM6637 provides standard I2S and S/PDIF digital audio interface.The maximum outputs are 12 channels separate to I2S,TDM,HDA and S/PDIF.The maximum inputs are 12 channels as well and separate to I2S,TDM,HDA and S/PDIF.

The first I2S out interface can be used to transfer PCM and DSD audio data.Moreover,the CM6637 supports I2C,SPI and GPIOs to communicate with external device.

The CM6637 is embedded with 8051 MCU and 512KB flash makes it is very flexible to change the USB topology or communicate with external device by changing internal flash code.

FEATURES

?Compliant with USB 2.0 high-speed

?Compliant with USB Audio Device Class 2.0/1.0

?Compliant with USB Human Interface Device(HID)Class 1.1

?Supports USB suspend/resume/reset functions

?Supports control,interrupt,bulk,and isochronous data transfers

?Input and output support I2S/TDM/HDA and SPDIF digital audio interfaces

?The first I2S output supports up to 768KHz/32bits PCM

?The first I2S supports both DoP and Native DSD

?DoP up to 11.2MHz,DSD256

?Native DSD up to 22.4MHz,DSD512

?3 stereo I2S serial audio input interfaces

?The first I2S input supports up to 384KHz/32bits

?S/PDIF input and output up to 192KHz/24bits

?1 I2C master,1 I2C slave,6 SPI master,24 GPIOs