新批次 CM119A 骅讯USB音频单芯片解决方案

　　Description and Overview

　　The CM119is a highly integrated, crystal-free USB audio single chip solution optimized for USB headset, headphone, and dongle applications such as VolP (Voice over Internet Protocol).All essential analog modules were embedded in the CM119including dual DAC and earphone driver,ADC, microphone booster,PLL, regulator, and USB transceiver. lt also supports 8GPIO pins. In addition, audio adjustments can be easily controlled via specific HID compliant volume control pins. Many features are programmable with jumper pins or external EEPROM. Vendors can customize unique USB VID/PID/Product String/Manufacture String and max/min/initial volumes to EEPROM. The CM119provides 12C interface for external MCU controls of GPIOs. lt also comes with an anti-pop noise circuits design and internal oscillator which can operate without an external crystal oscillator.