CM6502B Datasheet, PDF (5/40 Pages) C-Media Electronics – USB Audio Sound Chip

CM6502 / CM6502B
USB Audio Sound Chip
1 Description and Overview
CM6502 / CM6502B are a USB 2.0 audio chip builds in 8051 for flexible applications. With internal
2-channel ADC and DAC 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 / 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 48 K/44.1KHz sampling rate
and 16 bit resolution. CM6502 / CM6502B integrate the Equalizer on both playback and recording paths to
compensate the frequency response of microphone and headphone.
2 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 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
 Builds 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.
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