CM6631A Datasheet, PDF (1/16 Pages) C-Media Electronics – USB 2.0 High-Speed True HD Audio Processor

CM6631A
USB 2.0 High-Speed True HD Audio Processor
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.
BLOCK DIAGRAM
Self-Power
GPIO/JD
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
PDSW
Bus-Power
3.3V-to-2.5V
Regulator
GPIO Interface
Master I2C
Interface
Slave I2C
Interface
Parallel
EEPROM/Flash
Interface
MIDI
Local Address Data Bus
I/O
Port
Power-On
Reset
Interrupt
Processor
Control
Processor
8051 Processor
USB D+/D-
USB2.0
Transceiver
Interface
(UTMI)
12MHz
Optional
45.158M
and
49.152MHz
PLL
Clock-
Generator
www.cmedia.com.tw
Copyright © C-Media Electronics Inc.
USB
Core
Logic
Command Bus
Data Bus
PDMA_B (SPO)
PDMA_C (2CH)
PDMA_A (2CH)
RDMA_A (2CH)
RDMA_B (2CH)
RDMA_C (SPI)
FIFO
Rev. 1.0︱ Page 1/16
S/PDIF Out
2CH I2S/HDA-
Out
2CH
I2S/HDA-Out
Controller
2CH I2S/
HDA-In
Controller
2CH
I2S/HDA-In
Controller
S/PDIF IN