CMI8786
INTRODUCTION
CMI8768 series is the first high performance PCI integrated sound single-chip in the world which provide 8 channel output with upto 48K / 16 bit. Beside basic I/O supports, CMI8768+ supports Dolby Digital Live 5.1 (AC-3) real-time interactive content encoder. Dolby Digital Live encodes all digital audio sources on PC such as 3D game audio, VCD, MP3, WMA, Internet radio into 5.1CH Dolby Digital stream transmitted via consumer standard S/PDIF link to external decoder/receiver and even Home Theater system. With Dolby Digital Live encoder feature, users can easily connect PC audio to consumer sound system by S/PDIF interface. It realizes Digital Home Entertainment PC in the living room.

Addition to CMI9768+ with Dolby Digital Live 5.1 (AC-3) supported, CMI8770 also provides DTS Connect (DTS NEO:PC, DTS Interactive)   real-time interactive content encoder. DTS Neo:PC turns any 2channel audio into 7.1 channel surround sound. DTS Interactive encodes all audio streams into DTS bit stream transmitted through S/PDIF interface.

Integrated S/PDIF transmitter can also pass through 5.1 Dolby Digital/DTS, or 6.1/7.1 Dolby Digital Surround EX/DTS ES DVD audio stream to the external receiver satisfying audio enthusiasts and pioneers.

On the software side, CMI-8768 series supports Cmedia Xear Living and Cmedia Xear Voice with Windows Drivers. Linux driver is also available in most Linux OS versions.

 
PRODUCT FEATURES
  • PCI 2.2 interface with bus mastering and burst modes
  • Only one 24.576MHz oscillator is needed
  • 4 synchronous I2S output data stream pairs within 1 flexible output DMA
  • Programmable channel routing mechanism among the 4 I2S output pairs
  • 1 synchronous I2S input data stream pairs.
  • An alternatively multi-channel AC-link can support 1 AC97 codec
  • Programmable HW monitoring routing from I2S inputs to outputs.
  • All I2S I/O pairs support 24-bit high-definition PCM data transfer and adjustable sample rate up to 96KHz
  • Integrated 192k/24-bit S/PDIF transmitter with 1 dedicated S/PDIF OUT DMA
  • Integrated 192k/24-bit S/PDIF receiver with 1 dedicated S/PDIF IN DMA
  • S/PDIF IN supports digital loop back path for transforming between optical and RCA connection
  • A 48k/16-bit front panel DMA for AC97 codec
  • 2-wire master serial bus or 4-wire SPI (serial port interface) to control I2S codecs
  • Interrupt pin to inform external MCU to retrieve the data that system driver wants to pass out
  • One MPU-401 MIDI UART port
  • EEPROM control interface
  • 6 GPI phone jack detection pins to distinguish if a cable is plugged in the jack
  • 9 direct access GPIO pins
  • 128-pin LQFP high-quality thin package
 
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