USB 2.0 audio chip w/ integrated Tri-Colors PWM LED

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The CM6533/X1/DH is a USB 2.0 audio chip built-in 8051 for flexible applications. With integrated Tri-Colors PWM LED driver and two (2)-channel ADC/DAC and S/PDIF interface that makes it suitable for headset, docking, speaker and microphone applications. The internal 8051 can also be developed to a lot of different applications, such as Microsoft™ Lync/Skype/VoIP device, Android Phone or Tablet/Slate docking device. The CM6533/X1/DH is compatible with USB audio Class 1.0 and USB 2.0 full-speed, thus it can plug & play without any additional software installation on major operating systems. The internal DAC and ADC support from 8 ~ 96 KHz sampling rate and 16/24 bits resolution.

The CM6533/X1/DH integrates equalizer on both playback and recording paths to compensate the frequency response of microphone and headphone.

The CM6533/X1/DH also integrates 32KB flash and crystal but requires few passive components to make a finish product. Thus, it can save the total BOM cost and PCB area can be smaller.

Symmetry Electronics (and its e-commerce division: is an authorized Cmedia distributor.


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2.1 USB Compliance
USB 2.0 full-speed compliant
USB Audio Class 1.0 compliant
USB Human Interface Device (HID) Class 1.1 compliant
Supports USB suspend/resume/reset functions
Supports control, interrupt, bulk, and isochronous data transfers and overview
2.2 Integrated 8051 Microprocessor
Embedded 8051 micro-processor to handle the command/protocol transactions
Embedded 32KB SPI Flash
32K RAM for firmware extension and plug-in
HID interrupts/buttons/functions can be implemented via firmware codes
Provides maximum hardware configured flexibility with firmware code upgrade
VID/PID/Product String can program by firmware


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