Service Hotline: 13823761625

Support

Contact Us

You are here:Home >> Support >> Technology

Technology

CM119 USB Headphone Microphone Speaker Speaker Solution

Time:2023-08-28 Views:721
1、 The origin of CM119:
    CM119 is a highly integrated single-chip USB audio controller specifically designed for VoIP (Voice over Internet Protocol) applications. All important analog modules are embedded in CM119, including dual DAC and headphone driver, ADC, microphone booster, phase-locked loop, voltage regulator, and USB transceiver. Eight GPIO pins can form a 24 key matrix that directly supports keyboard control functions without the need for an MCU. It also supports VoIP applications with buzzer output pins. In addition, audio adjustment can be easily controlled through specific HID compatible volume control pins. Many functions are associated with programmable jumpers or external EEPROMs. Manufacturers can customize unique USB VID/PID as EEPROM for VoIP software certification. In addition, it is possible for each device to store an individual unique phone number through a serial number in an external EEPROM. In addition, CM119 provides I2C interface and advanced functionality for LCM integration with MCU applications. VoIP applications are becoming increasingly popular, and VoIP can provide free or low-cost services that appeal to the world. The experience of providing VoIP is due to the use of PC audio, which is related to the use of ordinary phones and poverty alleviation call quality. The integrated C-Media has a developed CM119 USB controller, which connects an ordinary phone, handheld device, or headphone to a USB port on a computer. C-media OEM manufacturers can quickly launch a series of low-cost and high-quality VoIP products into the market.
2、 Overview of the functions of CM119:
    Compliant with USB 2.0 full speed operation
    Complies with USB audio device class specification V1.0
    Supports USB suspend/resume mode and remote wake-up, with volume control pins
    Single 12MHz crystal oscillator input with on-chip PLL and embedded USB transceiver
    Jumper speaker mode (dedicated for playback) or headphone mode (playback+recording)
    For headphone mode, the topology of USB audio function has 2 input terminals, 2 output terminals, 1 hybrid unit, 1 selection unit, and 3 unit functions
    Jumper operating system hybrid unit enable/disable in headphone mode
    For speaker mode, the topology of USB audio function has 1 input terminal, 1 output terminal, and 1 set of functions
    Supports one control endpoint, 1 Isochroous OUT endpoint, 1 Isochroous at endpoint, and one interrupted endpoint
    Release the bandwidth of the USB bus and play the alternative zero bandwidth setting
    When the device is in an inactive volume state, lowering the volume and mute playback support USB HID host control synchronization
    Record the mute status of the mute pin with LED indicator light
    For supplier specific USB VID, PID, and external serial EEPROM interfaces
    Supports AES/EBU, IEC60958, S/PDIF consumer format PCM stereo
    Output data in S/PDIF
    8 GPIO pins and read/write through HID
    Built-in buzzer function, controlled by registers, integrated with external MCU supporting I2C interface
    Jumper output voltage swing (3.5V or 2.5V)
    Power mode setting for jumper pins
    Isochroous transmission adopts adaptive mode and internal PLL synchronization with a sampling rate of 48K/44.1KHz for playback and recording soft mute function
    Embedded high-performance 16 bit audio DAC and headphone phone buffer
    Host side data loss noise reduction function
    Built in 16 bit ADC input, microphone gain
    Power-on reset module embedded power supply
    Embedded 5V to 3.3V voltage regulator, compatible for single external 5V operation
    Win98/WIN ME/Win 2000/Win XP and Mac OS9/OS X
    No additional drivers required
    48 pin LQFP package
    Support hardware SDK tools, third-party software or softphone development



 












   
      
      
   
   


    Disclaimer: This article is transferred from other platforms and does not represent the views and positions of this site. If there is any infringement or objection, please contact us to delete it. thank you!
    矽源特科技ChipSourceTek