CM6502B Datasheet, PDF (6/40 Pages) C-Media Electronics – USB Audio Sound Chip

CM6502 / CM6502B
USB Audio Sound Chip
 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)
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Rev. 1.02 ︱ Page 6