CM6631A数据手册Cmedia中文资料规格书

描述 Description

Cmedia CM6631A is a USB2.0 true high-speed audio processor that can support the latest  USB Audio Class 2.0 and high-definition audio processing capability up to 192KHz/32bit. CM6631A provides the industrial standard I2S and HDA audio interface and also integrates 192KHz/24bit S/PDIF transmitter/receiver and MIDI I/O device. It’s suitable for versatile, high-profile, typical 2-channel I/O audio applications.
Furthermore, CM6631A has an embedded 8051 microprocessor that can enhance the best flexibility and functionality with external upgradeable F/W codes. CM6631A would be the most high-fidelity and powerful audio core for high-value USB Audio Class 2.0 products.

特性 Features

●USB Compliance
·USB Spec. Rev.2.0 high-speed/full-speed mode compatible
·Latest USB Audio Device Class Definition Release v.2.0/1.0 compatible
·USB Human Interface Device (HID) Class Definition Release 1.1 compliant
·Supports USB suspend/resume/reset functions
·Supports control, interrupt, bulk, and isochronous data transfers

●Audio Engine
·Max. 3 Independent Playback Streams:-Default Sample Rates: 44.1K/48K/88.2K/96K/176.4K/192KHz (192K/176.4KHz are available only in USB Audio Class 2.0/High-speed mode)-Supported Bit Length: 16/24/32 bit-PDMA#A and C engines support 2-channel data to I2S/HDA output-PDMA#B supports S/PDIF output
·Max. 3 Independent Capture Streams:-Default Sample Rates: 44.1K/48K/96K/192KHz (192K/176.4KHz are available only in USB Audio Class 2.0/High-speed mode)-Supported Bit Length: 16/24/32 bit-RDMA#A and B support 2-channel data from I2S/HDA input-RDMA#C supports S/PDIF input (192KHz is supported only with Crystal and PLL clock source) Digital mixing/routing engine to mix input streams to output streams

●Audio I/O
·2 pairs I2S or Left-Justified serial audio output interface
·2 pairs I2S or Left-Justified serial audio input interface
·Built-in 192K/176.4K/96K/88.2K/48K/44.1KHz and 16/24-bit S/PDIF transmitter
·Integrated 192K/176.4K/96K/88.2K/48K/44.1K and 16/24-bit S/PDIF receiver
·Supports S/PDIF IN-to-OUT loop-back path for signal transforming between TOSLINK and RCA connections

●Integrated 8051 Micro-processor
·Embedded 8051 micro-processor to handle the comment/protocol transactions
·Connects to an external parallel Flash/EEPROM memory (Max. 64KB, 55ns access time is required) for firmware codes
·HID interrupts can be implemented via firmware codes
·Provides maximum HW configuration flexibility with firmware code upgrade
·VID/PID/Product String can be customized via firmware code programming

●Control Interface
·Master I2C control interface for external audio devices or EEPROM access
·Slave I2C control interface and interrupt pin for external MCU/device communication
·9 GPIO pins and 6 GPI pins
·External device power-down control and reset pins

●General
·Embedded USB2.0 transceiver (up to 480MB bandwidth)
·Auto detection for high-speed/full-speed
·GPIO pin for USB Audio Class 2.0 and 1.0 application mode configuration
·Provides Self-power or Bus-power mode selection pin
·Only single 12MHz crystal input is required (embedded PLL function) or optional oscillator inputs for 49.152 or 24.576MHz (for x48KHz) and 45.158 or 22.5792MHz (for x44.1KHz)
·Single 3.3V power supply (embedded 3.3V to 2.5V regulator for digital core)
·3.3V digital I/O pads with 5V tolerance
·Industrial standard LQFP-100 package (16x16mm)