骅讯 CM108B 无晶体USB音频单芯片解决方案
Features
Supports USB 2.0 full speed operation
Compliant with USB audio device class specification 1.0
Supports USB suspend/resume modes and remote wakeup with volume control pins
On-chip oscillator that provides reference sources for PLL and embedded USB transceiver
Support Xear™ audio driver for multimedia sound effects in Windows OS, for further information please refer to CM108B Xear'™ Audio Center Driver User's Manual
Jumper pin for speaker mode (playback only) or headset mode (playback plus recording)
For headset mode, USB audio function topology has 2 input terminals, 2 output terminals, 1 mixer unit, 1 selector unit and 3 feature units
Jumper pin allows for mixer unit enable/disable when in headset mode
For speaker mode, the USB audio topology has 1 input terminal, 1 output terminal and 1 feature unit
Supports one control endpoint, one isochroous OUT endpoint, one isochroous IN endpoint, and one interrupt IN endpoint
Alternate zero bandwidth setting for releasing playback bandwidth on USB Bus when device is inactive
Anti-pop noise design for device plugged and vice-versa, while A-A path is off
Supports AES/EBU, IEC60958,S/PDIF consumer formats for stereo PCM data at S/PDIF output
Volume up, volume down, and playback mute pins support USB HID for host control synchronization
Record mute pin with LED indicator for record mute status
Includes external EEPROM Interface for Vendor Specific USBVID,PID,Product String,Manufacture String, and max/min/initial volumes
3 GPIO pins with read/write viaHID interface
Jumper pin to set the power mode (100mA or 500mA, Bus-powered or self-powered)
lsochronous transfer uses adaptive mode with internal PLL for synchronization
48K/44.1KHz sampling rate for both playback and recording
Soft mute function
USB Audio Single Chip
Embedded 16-bit ADC input with microphone boost
Embedded power-on reset block
Embedded 5V to 3.6V/3.3V/1.8V regulators for single external 5V power
48-pin LQFP package