Datasheet > CMI8788_17

CMI8788_17

更新时间： 2022-02-26 14:27:04

品牌	Logo	应用领域
CK-COMPONENTS		PC
页数	文件大小	规格书
25页	902K
描述
High Performance PCI Audio Processor

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CMI8788_17 数据手册

Oxygen^TMHD CMI8788

High Performance PCI Audio Processor

1 Description and Overview

The 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. It supports up to

12 output channels and 8 input channels. The 12 output channels are composed of 3 playback DMA’s,

which are multi-channel DMA (32 bits, 8 channels, 192k), S/PDIF DMA (32 bits, 2 channels, 192k), and front

panel DMA (16 bits, 2 channels, 48k). The 8 input channels are spread across 3 recording DMA’s (32 bits,

192k) - recording A, B, and C DMA’s. The architecture of recording is a unique point of CMI8788 that

enables very flexible recording options for the user. The details of the recording mode selection will be

explained in the later sections.

The CMI8788 is compatible with all the popular codecs, from I2S codecs with over 120dB quality to the

usual AC97 codecs. This ability gives customers the flexibility to design their products exactly the way they

want them. The I2S, AC-Link, 2-wire master bus, and SPI interfaces are used to transfer audio data and

control data between the CMI8788 and codecs. To facilitate the connection with existing home audio

electronics, the CMI8788 has incorporated the S/PDIF transmitter and receiver with 192k sampling rate.

An EEPROM interface is built for the CMI8788 in connection with the EEPROM to store and retrieve the

non-evaporable data for customer applications, such as board configuration, sub-vendor and sub-system

IDs of the PCI configuration, or any dynamic data that customers want to restore at the next power-on.

The CMI8788 has an independent 2-wire slave bus to communicate with the micro control unit (MCU). This

interface is used as a medium for the system driver and the MCU to exchange data. One of the applications

of the 2-wire slave bus is to transmit the control data from the remote controller to the system driver. The

MPU-401 MIDI UART is also integrated in the CMI8788.

There are six GPI phone jack detect pins in CMI8788, which can be used to distinguish if a cable is plugged

in the phone jack. There are 9 GPIO pins on the chip, however some of them are shared with other

functions. The C-Media’s unique device sensing technology is implemented in CMI8788, which can indicate

whether a speaker or a headphone is plugged in the jack. Then according to this information, the system

driver can decide to turn on the C-Media’s X-ear 3D audio technology if appropriate.

2 Features

2.1 Hardware 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

4 synchronous I2S input data stream pairs spread in 3 input DMA’s (for Dolby pro-audio applications)

Optionally, a multi-channel AC-link can support 2 AC97 codecs 8 channel DAC output with 16 bit

resolution

www.cmedia.com.tw

Rev. 1.2 ︱ Page 4/25

1 2 345 6 7...25

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与CMI8788_17相关器件

型号	品牌	描述	获取价格	数据表
CMI-9605-0580T	CUI	MAGNETIC BUZZER INDICATOR	获取价格
CMI-9605-1280T	CUI	MAGNETIC BUZZER INDICATOR	获取价格
CMI-9653S-SMT-TR	CUI	AUDIO MAGNETIC IND 2-5V SMD	获取价格
CMI-9705-0380-SMT-TR	CUI	MAGNETIC BUZZER INDICATOR	获取价格
CMI-9705-0580-SMT-TR	CUI	MAGNETIC BUZZER INDICATOR	获取价格
CMI9738	ETC	Integrated Multi-channel AC97	获取价格
CMI9761A	ETC	C-Media CMI9761A / 9761A+ 6 Channel AC97 2.3 Audio Codec	获取价格
CMIDSH1-3	CENTRAL	CMJ0130_CMJH180	获取价格
CMIDSH1-3TR	CENTRAL	Rectifier Diode, Schottky, 1 Element, 1A, 30V V(RRM), Silicon, SOD-323FL, 2 PIN	获取价格
CMIDSH1-4	CENTRAL	1A,40V Surface mount Rectifier-Schottky (>=1A) Single	获取价格
CMIDSH1-6	CENTRAL	1A,60V Surface mount Rectifier-Schottky (>=1A) Single	获取价格
CMIS-019-01-C-D	SAMTEC	Board Connector, 38 Contact(s), 2 Row(s), Female, Straight, Surface Mount Terminal, Socket	获取价格
CMIS-038-01-C-D	SAMTEC	Board Connector, 76 Contact(s), 2 Row(s), Female, Straight, Surface Mount Terminal, Socket	获取价格
CMIS-057-01-C-D	SAMTEC	Board Connector, 114 Contact(s), 2 Row(s), Female, Straight, Surface Mount Terminal, Socke	获取价格
CMIS-076-01-C-D	SAMTEC	Board Connector, 152 Contact(s), 2 Row(s), Female, Straight, Surface Mount Terminal, Socke	获取价格
CMIS-095-01-C-D	SAMTEC	Board Connector, 190 Contact(s), 2 Row(s), Female, Straight, Surface Mount Terminal, Socke	获取价格
CMIS-114-01-C-D	SAMTEC	Board Connector, 228 Contact(s), 2 Row(s), Female, Straight, Surface Mount Terminal, Socke	获取价格
CMIS-133-01-C-D	SAMTEC	Board Connector, 266 Contact(s), 2 Row(s), Female, Straight, Surface Mount Terminal, Socke	获取价格
CMIT-019-02-C-D	SAMTEC	Board Connector, 38 Contact(s), 2 Row(s), Male, Straight, Surface Mount Terminal,	获取价格
CMIT-019-02-C-D-K	SAMTEC	Board Stacking Connector, 38 Contact(s), 2 Row(s), Male, Straight, Surface Mount Terminal	获取价格

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