CM8888DHT 骅讯PCI快速音频处理器 货源充足

　　Description and Overview

　　The Oxygen Express"-series HD CM8888 is a high- quality PCI Express multi-channel audio processor with an Intel HD Audio specification-compatible audio chip. It is also a controller that can link HDA codecs or bridge high-quality 125 codecs. The CMB8B8 can be built into home audio elec tronics or personal computers to provide high-fidelity sound, providing a professional audio processing center, It supports up to 14 outgoing channels and 12 ingoing channels. The 14 outgoing channels are compased of 4 playback DMA's, including a multi-channel DMA (32 bits, 8 channels, 192k), a S/PDIF &HDMI DMA (each 32 bits, 2 channels, 192k), and a RTC (real.time communication) DMA (32 bits,2 channels, 192k) channels.

　　The 12 ingoing channels are spread out in 3 recording DMAs (up to 32 bits, 192k). The Oxygen Express"-series HD CMB888 is a MCU.based audio processor that can link all the currently popular codecs, from 125 codecs with over 120dB quality to regular HDAcodecs. The audio topology for HDA specifications is flexible only by changing the firmware. The flexibility to change the firmware gives customers added flexibility when designing their products. The 12S, HDA-Link, 2-wire master bus, and SPI

　　interfaces are used to transfer audio data and control data between the CM8888 and codecs. To facilitate the connection with the existing home audio electronics, the CM8888 has incorporated an 5/PDIF transmitter and receiver with a 192k sampling rate.

　　built-in master 12C interface connects to the serial EEPROM to store and retrieve non-evaporable data for firmware code and the customer applications, including as board configuration, sub-vender and sub-system 1Ds, or any dynamic data that customers want to save and restore on system power up.

　　The Oxygen Express™HD CM8888 series has an independent 2-wire slave bus to communicate with the MCU. Strictly speaking, this interface is used as a medium system driver and MCU communication. An MPU-401 MDI UART is also integrated. There are eight GPl phone jack detect pins, which can be used to distinguish if a device is plugged into a phone jack. In total there are 10 GPIO pins, however, some of them are shared with other functions.