骅讯USB音频单芯片 CM118B 采用LQFP-48封装

　　DESCRIPTION

　　The CM118B is a highly integrated, crystal-less USB audio single chip solution optimized for USB headset,headphone, dongle,microphone and application such as VolP (voice over Internet protocol).

　　All essential analog modules are embedded in the CM118B, including dual DAC and ADC，earphone driver,microphone booster,PLL, regulator, and USB transceiver. It also supports 3 GPIO pins. In addition, audio adjustment can be easily controlled via specificHID compliant volume control pins. Many features such as headset, headphone and microphone only topologies are programmable withjumper pins. Vender can customize unique USB VID / PID / Product String / Manufacture String and min/max/initial volumes to the external EEPROM. The CM118Balso offers anti-pop noise circuits design and internal oscillator which can operate without an external crystal oscillator.