CM8888 Datasheet, PDF (1/25 Pages) California Micro Devices Corp – CMOS INTEGRATED DTMF TRANCEIVER

Oxygen^TM Express-series CM8888
High-Performance PCI Express Audio Processor
DESCRIPTION
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 I2S codecs. The
CM8888 can be built into home audio electronics 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
composed 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).
FEATURES
 Compatible with PCI Express 1.1 interface, with
bus mastering and burst modes
 Embedded 8051-based MCU transcodes HD Audio
commands to link various external I2S codecs
(external 4 or 8KB serial EEPROM is required)
 Built-in HD Audio and I2S controllers
 I2S interface sample rate supports
192K/176.4K/96K/88.2K/48K/44.1K and
16/24/32-bit resolutions
 Integrated 192K/176.4K/96K/88.2K/48K/44.1K
and 16/24-bit S/PDIF transmitter/receiver
 Supports SPI/I2C control interface
 24.576MHz crystal input required with embedded
PLL for adaptive clock rate
Block Diagram
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