CM6502 Eval Board

Manufacturer:
MFG Part #:

CM6502-EVB

Part #:
CM6502-EVB
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Product Information

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For new designs, the Cmedia CM6533 is highly reomended. The CM6533 integrates FLASH and Xtal which reduces BOM cost.
    
Evaluation board for the CM6502B audio chip build.
   
CM6502B is a USB 2.0 audio chip builds in 8051 for flexible applications. With internal 2-channel ADC and DAC and S/PDIF interface makes it suits for Headset, Docking, Speaker and Mic applications. The internal 8051 can be also developed to a lot of different applications, such as Lync device, iDevice docking or even Android Phone or Tablet/Slate docking device.
  
CM6502 integrates the Equalizer on both playback and recording paths to compensate the frequency response of mic and headphone.CM6502B is compatible with USB audio Class 1.0, thus it 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. 
Product Benefits: 
  • 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
  • Supports Digital Mic interface
  • Built in 48K/44.1KHz and 16bit S/PDIF transmitter
  • Built in Equalizer on both playback and recording paths
  • Built in AGC on recording path
  • Supports USB suspend/resume/reset functions
  • Supports control, interrupt, bulk, and isochronous data transfers
  • Embedded 1T 8051
  • Master I2C control interface for external audio devices or EEPROM access
  • 14 GPIO pins

Block Diagram

Block diagram

 

Features

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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 Stream:
Stereo DAC:
Sample Rates: 8K/11.025K/16K/22.05K/32K/44.1K/48K
Supports Bit Length: 16 bit
Gain Range is -62 ~ 0dB, 1dB/step
Built in S/PDIF transmitter:
Sample Rates: 44.1K/48K
Supports Bit Length: 16 bits
Recording Stream:
Stereo ADC:
Sample Rates: 8K/11.025K/16K/22.05K/32K/44.1K/48K
Supports Bit Length: 16 bits
Microphone gain range is 4 ~ 34dB, 1dB/step by default, the range can be programmed by external eeprom from -18 ~ 49dB.
A-A Stream:
Stereo A-A path playback:
Can be programmed by external eeprom to mono microphone input and duplicate to stereo playback
The Microphone playback gain range is -15 ~ 22dB, 1dB/step by default, and can be programmed by external eeprom from -14 ~ 32dB.
Integrated 8051 Micro-processor:
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)
 

Previously Viewed Products

CM6502 Eval Board
Part #: CM6502-EVB
CM6502 Eval Board