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
BLOCK DIAGRAM