CRD1569-1 Flyer Datasheet by Cirrus Logic Inc.

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Two-Mic Rapid Development Platform for
Alexa-Enabled Smart Home Products
Based on Cirrus Logic’s SoundClear® Voice Control two-mic reference
board, the CRD1569-1 provides a complete platform for the evaluation,
prototyping and development of smart home products enabled with
Alexa Voice Service (AVS), and requires minimal customization to reduce
time-to-market. This kit is designed to enhance the end-user experience
of AVS by increasing accuracy of voice interaction and by supporting
high-fidelity audio playback. This fully functioning solution includes all
required hardware and firmware, plus a web-based server control console
to manage wake word, AVS, noise suppression, and barge-in (AEC)
performance. Prototype integration is made simple with options to direct
connect or ribbon cable connect the reference board to a Raspberry Pi 3
(RPi3) and use a single 5 V supply for both boards. The firmware control
console simplifies operation of the various RPi3 applications and provides
a robust user friendly GUI to perform acoustic tuning and diagnostic
functions. The reference board schematic design and bill of materials are
designed to be pasted into most Alexa-enabled device applications with
minimal customization to accelerate product introduction. The board’s
sophisticated CS47L24 smart codec with integrated hi-fi data conversion
and amplification, combined with the high performance dual CS7250B
digital MEMS mic array, provide superior product performance.
Features
Enhanced “Alexa” wake-word triggering and command
interpretation at distance and in noisy environments
Increases accuracy and reliability of Alexa voice responses to
voice requests
Acoustic Echo Cancelation (AEC) enables users to “barge-in”
during Alexa response and music playback and be understood
Consumes about 24 mW for continuous voice capture and AEC
Reference board features the Cirrus Logic CS47L24 dual
core, low power smart codec with SoundClear® two-mic voice
control DSP firmware
Integrated stereo hi-fi D/A converter with 121 dB SNR
Stereo headphone/line out with only 1% THD+N
Built-in 2 W Class D speaker driver
Dual Cirrus Logic CS7250B high performance digital MEMS
microphone array for omni-directional spatial capture and noise
reduction
Port for connecting optional external digital MEMS microphone
array
Web-based firmware control console for simplified interactive
operation, acoustic tuning and diagnostics
Operates headless and wireless without anything connected to
the RPi3 board other than the 5 V power source
Notes: Cirrus Logic does not own, provide or warrant software components required. Registration with Amazon Developer site required.
Voice Capture Development Kit
For Amazon AVS – CRD1569-1
0 amazon alexa ] __- __— __— _— _— CIRRUS LOGIC”
Cirrus Logic, Inc.
800 West Sixth Street
Austin, Texas 78701
United States
T+1-512-851-4000
F+1-512-851-4977
Sales Support
North America +1-800-888-5016
Asia Pacific +852 2376-0801
Japan +81-(3)-5782-8180
Europe/UK +44-(0)-131-272-7000 www.cirrus.com
Voice Capture Reference Board Block Diagram
Control Console
JULY 2017
© 2017 Cirrus Logic, Inc. All rights reserved. Cirrus Logic, Cirrus, the Cirrus Logic logo designs, SoundClear and the SoundClear logo design are trademarks of Cirrus Logic, Inc.
Raspberry Pi, Amazon, Alexa, the Amazon Alexa logo design, and other brand and product names in this document may be trademarks or service marks of their respective owners.
On Board
2-Digital
Mic Array
External
2-Mic Interface
(optional use)
Audio
Outputs for
Playback
Audio
Outputs for
Playback
Alexa Client, UX
and Middleware
RPi3 Board Included
Device
System
Software
Sensory WWE
Cirrus Logic CS47L24
Smart Codec
Duet
Ref.
Design
Board
Voltage Regulators Voltage Regulators
Digital Mic
Port for
Optional
Connection
of External 2
Mic Array
Digital Audio
Out
(2-Digital
Audio I/O
Ports)
5.0 V
3.3 V
Analog
Stereo
Headphone/
Line Out
Analog Mono
Speaker Out
Dual-Core ADSP
H/W Accelerators
Omni-directional Spatial
Noise and Reverb Reduction
Barge-in/Acoustic Echo
Cancelation
Gain Control
Parametric EQ
Dynamic Range Control
Programmable Filters
Side Tone and Mixing
Sample Rate Conversion
DAC
DAC
DAC
AMP
AMP
AMP
IRQ
RESET
I2S
SPI
“RPi3 Hat” Direct
Connection Option
Assembled CRD1569-1
Development Kit
Voice
Capture
Reference
Board
Voice
Capture
Reference
Board
Speaker
Box
Voice
Capture
Reference
Board
Raspberry Pi 3
Board
(included with kit)
Raspberry Pi 3
Board
(included with kit)
Raspberry Pi 3
Board
(included with kit)
Ribbon Cable
Connection Option
Sensory Alexa Voice Trigger
Alexa Voice Service Access
Built-in wireless and hotspot

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