CM6502B数据手册Cmedia中文资料规格书

描述 Description

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.
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 integrates the Equalizer on both playback and recording paths to compensate the frequency response of mic and headphone.

特性 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.
·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)