CM6631A_Datasheet_v1.0.pdf

CM6631A USB 2.0 High-Speed True HD Audio Processor .tw Copyright ? C-Media Electronics Inc. Rev. 1.0︱ Page 1/16 BLOCK DIAGRAM DESCRIPTION Cmedia CM6631A is a USB2.0 true high-speed audio processor that can support the latest USB Audio Device Class Definition V2.0 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 USB2.0 audio products. FEATURES ? 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 ? 2 pairs I2S or Left-Justified serial audio output /input interface ? I2S input/output support 192K/176.4K/96K/88.2K/48K/44.1KHz and 16/24/32-bit ? Built-in 192K/176.4K/96K/88.2K/48K/44.1KHz and 16/24-bit S/PDIF transceiver ? Supports S/PDIF IN-to-OUT loop-back path for signal transforming between TOSLINK and RCA connections 3.3V-to-2.5V Regulator Self-Power Bus-Power Power-On Reset PLL Clock- Generator 12MHz USB2.0 Transceiver Interface (UTMI) USB D+/D- USB Core Logic 2CH I2S/HDA-Out Controller GPIO Int