CMI8787
INTRODUCTION
The CMI8787 and CMI8788 is a high quality PCI 32-bit multi-channel audio processor that can be built into home audio electronics or personal computers to provide high fidelity sound playback and processing for high-end audio applications. It supports up to 8 output channels which enables 7.1-channel suround sound with High-Definition 192k / 24bit audio joyfulness from only personal computers. Besides, the CMI8787 also provide diverse audio I/O such as S/PDIF (32 bits, 2 channels, 192K), front panel (16 bits, 2 channels, 48K) and MIDI (MPU-401) port. The 8-input-channels architecture of recording is a unique point of the CMI8787 that enables very flexible recording options for users.
 
PRODUCT FEATURES
  • PCI 2.2 interface with bus mastering and burst modes
  • 4 synchronous I2S output pairs
  • 4 synchronous I2S input pairs
  • Multi-channel AC-link can support 2 AC97 codecs
  • All I2S I/O pairs support 32-bit high-definition PCM data transfer and adjustable sample rate up to 192KHz
  • Integrated 192k/24-bit S/PDIF transmitter
  • Integrated 192k/24-bit S/PDIF receiver
  • S/PDIF IN supports digital loop back path for transforming between optical and RCA connection
  • Serial bus to communicate with micro control unit (MCU)
  • MPU-401 MIDI UART port support
  • EEPROM control interface
  • 9 direct access GPIO pins
  • 128-pin LQFP high-quality thin package
  • Optional: Front panel design available with ac97 codec
 
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