CMI8787 Datasheet, PDF (6/28 Pages) C-Media Electronics – High Performance PCI Audio Processor

C-Media High Performance PCI Audi o Processor
Oxygen^TM HD CMI8787 Datasheet v0.5
1. Features and General Description
1.1 Hardware Features
n PCI 2.2 interface with bus mastering and burst modes
n Only one 24.576MHz oscillator is needed
n 4 synchronous I²S output data stream pairs within 1 flexible output DMA
n Programmable channel routing mechanism among the 4 I²S output pairs
n 4 synchronous I²S input data stream pairs spread in 3 input DMA’s (for Dolby
pro-audio applications)
n Optionally, a multi-channel AC- link can support 2 AC97 codecs
n Programmable HW monitoring routing from I²S inputs to outputs
n All I²S I/O pairs support 32-bit PCM data transfer and adjustable sample rate (up to
192KHz)
n Integrated 192k/24-bit S/PDIF transmitter with 1 dedicated S/PDIF OUT DMA
n Integrated 192k/24-bit S/PDIF receiver in recording DMA
n S/PDIF IN supports digital loopback path for switching between optical and RCA
connections
n 48k/16-bit front panel DMA for AC97 codec
n 2-wire master serial bus or 4-wire SPI (Serial Peripheral Interface) bus to control
I²S codecs
n 2-wire slave serial bus to communicate with microcontroller unit (MCU)
n Interrupt pin to inform external MCU to retrieve the data from the system driver
n One MPU-401 MIDI UART port
n EEPROM control interface
n 6 GPI phone jack detection pins
n Advanced device-sensing technology indicates whether a speaker or a headphone
is plugged in the jack
n 9 direct-access GPIO pins
n 3 bonding-option bits for 8 identification possibilites
n 128-pin LQFP thin high-quality package
5
C-MEDIA CONFIDENTIAL