CM6502B Datasheet, PDF (1/40 Pages) C-Media Electronics – USB Audio Sound Chip

CM6502 / CM6502B
USB Audio Sound Chip
DESCRIPTION
CM6502 / CM6502B are 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 / 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.
CM6502 / CM6502B integrates the Equalizer on
both playback and recording paths to compensate
the frequency response of mic and headphone.
BLOCK DIAGRAM
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
 Support Digital Mic interface
 Build in 48K/44.1KHz and 16bit S/PDIF
transmitter
 Build in Equalizer on both playback and recording
paths
 Build in AGC on recording path
 Support USB suspend/resume/reset functions
 Support control, interrupt, bulk, and isochronous
data transfers
 Embedded 1T 8051
 Master I2C control interface for external audio
devices or EEPROM access
 14 GPIO pins
USB
Interface
Crystal
EEPROM
AGC
SRAM(16KB)
ROM(18KB)
MCU
5-Band EQ
ADC
5-Band EQ
DAC
4 ~ 34dB
1dB/step
Microphone In
-15 ~ 22dB
1dB/step
-62 ~ 0dB
1dB/step
Speaker/
Heaphone
SPDIF Out
GPIO x 14
Uart, I2C
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Rev. 1.02 ︱ Page 1