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USB 2.0 audio chip with integrated 8051

The cmedia CM6500B is a USB 2.0 audio chip with integrated 8051 for flexible applications. With an internal 2-channel ADC and DAC and S/PDIF interface makes the CM6500B suitable for Headset, Docking, Speaker and Mic applications. The internal 8051 can be also developed for a lot of different applications, such as Lync device, iDevice docking or even Android Phone or Tablet/Slate docking device.

CM6500B is compatible with USB audio Class 1.0, and can plug & play without additional software installation on the major operation systems. The internal DAC/ADC and S/PDIF out interface support 48K/44.1KHz sampling rate and 16bit resolution.

Features
  • USB 2.0 full-speed compliant
  • USB Audio Class 1.0 compliant
  • USB Human Interface Device (HID) Class 1.1 compliant
  • 2 channel DAC for audio output interface
  • 2 channel ADC for audio input interface
  • Build in 48K/44.1KHz and 16bit S/PDIF transmitter
  • Build in AGC on recording path
  • Support USB suspend/resume/reset functions
  • Support control, interrupt, bulk, and isochronous data transfers
  • Embedded  8051
  • Master I2C control interface for external audio devices or EEPROM access
  • 14 GPIO pins
Product features
  • 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
Audio I/O
  • Playback Streams:
  • -Stereo DAC
  •  *Sample Rates: 8K/11.025K/16K/22.05K/32K/44.1K/48K 
  •  *Supports Bit Length: 16 bit
  • -Builds in S/PDIF transmitter 
  •  *Sample Rates: 44.1K/48K
  •  *Supports Bit Length: 16 bits
  • Recording Streams:
  • -Stereo ADC
  •  *Sample Rates: 8K/11.025K/16K/22.05K/32K/44.1K/48K
  • lSupports Bit Length: 16 bits
Integrated 8051 Microprocessor
  • Embedded 8051 micro-processor to handle the comment/protocol transactions
  • Connects to an external EEPROM memory for firmware codes
  • HID interrupts can be implemented via firmware codes
  • Provides maximum HW configuration flexibility with firmware code upgrade
  • VID/PID/Product String can be customized via firmware code programming
  • Control Interface
  • Master I2C control interface for external audio devices or EEPROM access
  • Max. 14 GPIO pins can be configured via firmware programming
  • GPIOs are configured as HID key and LED indicators
General
  • Hardware pins for mode configuration including Headset, Speaker, Docking and Mic
  • Hardware pin for A-A path enable/disable
  • Only single 12MHz crystal input is required (embedded PLL function)
  • Single 5V power supply (embedded 5V to 1.8V regulator for digital core, 5V to 3.3V regulator for digital IO, 5V to 3.5V regulator for analog codec)
  • 3.3V digital I/O pads with 5V tolerance
  • Industrial standard LQFP-48 package (7x7mm)
Next USB Audio Product
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