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CX2077X Datasheet, PDF (1/2 Pages) Conexant Systems, Inc – On-Chip Voice//Audio DSP | |||
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CX2077x USB Audio Codec IC with Integrated DSP
and Tri-color PWM LED Driver
Innovative cost-effective single-chip solution enables superior audio
Conexantâs CX2077x is the first USB audio
codec Integrated Circuit (IC) product family that
incorporates the functionality of a digital audio/
voice processor, USB audio codec, and Tri-
color Pulse-Width Modulator (PWM) driver, and
digital audio interfaces in one cost-effective,
single-chip package. The award-winning Digital
Signal Processor (DSP) runs a suite of turnkey
audio and voice algorithms that greatly
enhances the voice and audio experience. The
devices are part of Conexantâs embedded
audio solutions and are specifically designed
for USB audio peripherals, including headsets,
headphones, and microphones. The CX2077x
product family includes CX20773, CX20774,
and CX20776.
The on-chip DSP runs a suite of innovative
Conexant proprietary voice processing
algorithms and audio post processing effects
that dramatically improves sound quality and
frees up processing power for other
applications without compromising on cost and
future firmware scalability. Key audio
innovations include Subband Acoustic Echo
Cancellation, Dynamic Range Control, Inband
Microphone Noise Reduction, 3D, and
Microphone Auto Gain Control.
Conexantâs innovative CX2077x product family
contains an industry-first internal tri-color RGB
(red, green, blue) PWM driver and controller.
Each LED output contains an 8-bit resolution
PWM controller for brightness and dimming
control, enabling designers to create
differentiated user-friendly products. The on-
chip RGB PWM significantly reduces the Bill-of-
Material (BOM) costs.
The audio performance is optimized with stereo
high fidelity 24-bit DAC. All internal analog
circuitry uses differential signaling to guard
against noise coupling from interfering RF. The
external BOM cost is minimized with internal
PLL and headset in-rush circuit.
The CX2077x turnkey solutions eliminate the
need for a multiple-chip reference design,
making it easy and economical for
manufacturers to design high-quality audio
products. A complete evaluation kit with
reference board and all the necessary technical
documents and software is available.
Key Features
USB Audio Codec with integrated DSP
Tri-color PWM LED Driver
Advanced Voice and Audio DSP Algorithms
Dual Stereo DMA Endpoints
Digital Audio Interfaces
Benefits
Audio enhancement and optimization for speakers
and microphones
Configurable features for product differentiation
Improves audio and voice experience
Independent Gaming audio and voice audio
control
Connect to third party digital audio processor
Applications
 Unified Communication USB
Headset
 Skype Super-wideband Headset
 Entertainment USB Headset/
Headphones
 Gaming USB Headset
 USB Microphone
CX2077x Features
 On-Chip Voice//Audio DSP
â DSP support for 3D, EQ, NR,
AEC, BF,CNG, ST, AGC, and
DRC
â USB Codex, 2.0 Full Speed
 Stereo Input, Differential and Single-
ended
 Microphone Input
 Stereo Input, Single-ended for Line-in
 Stereo Output, Differential and Single-
ended
 Line Output
 Stereo Headphone Driver, Single-
ended
 HP Output
 Dual Stereo DMA End Points
 PCM/I2S, S/PDIF Digital Audio I/F(s)
 UART, I2C
 Stereo DAC/Stereo ADC
 8, 16, 24, 32, 44.1, 48 kHz Sampling
rate
â <100 mA operation for Headset/
Headphone Terminal Type
 Tri-color (RGB) PWM LED Driver
and controller
 8-bit 256-step independent and
group brightness and dimming
control
 9kB Controller RAM for firmware
extension and plug-in
 Up to 18 GPIO
 Volume, Mute, Hook, and LED
 Infinity rotary wheel control
 Press-N-Hold button support
 4 wires external Co-processor
interface (I2S/SPDIF-Out)
 In-rush Circuit Elimination Circuit
for Headset/Headphone
applications
 Stereo Microphone input with
hardware boost and bias
 35 mW Stereo Headphone driver
 Jack Sense
 Interface to controller LCD display
 24-button keypad support
 48-pin and 64-pin QFN Package
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