Microsemi
®
AcuEdge™
Technology
ZL38040
Advanced Wideband Audio Processor
Product Brief
Features
•
•
DSP with Voice Hardware Accelerators
Dual
ΔΣ
DACs with output sampling up to 48 kHz
and internal output drivers
•
•
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4 single-ended or 2 differential Output Amps
44.1/48 kHz Stereo Music Playback with Voice
Two Digital Microphone inputs supporting
up to 3 Microphones
Two TDM ports shared between PCM and
Inter-IC Sound (I
2
S)
•
Each port provides sample rate conversion
and synchronous and asynchronous TDM
bus operation
Device OPN
(1)
ZL38040LDF1
ZL38040LDG1
1.
Document ID# 147016
Version 5
May 2014
Ordering Information
Package
64-pin QFN (9x9)
64-pin QFN (9x9)
Packing
Tape & Reel
Tray
The Green package meets RoHS 2 Directive 2011/65/EU of the
European Council to minimize the environmental impact of
electrical equipment.
Applications
•
•
Wideband Speakerphone
Home Automation
Description
The Microsemi
AcuEdge
Technology
ZL38040
Advanced Wideband Audio Processor
is designed to
provide leading edge acoustic echo cancellation and
noise reduction for the Wideband Speakerphone and
Home Automation markets.
The ZL38040 device is a highly adaptable hardware
platform designed to support high performance audio
processing applications. The ZL38040 provides a
powerful DSP with voice specific hardware
accelerators, two digital microphone interfaces, two
independent 16-bit DACs, and two flexible TDM
interfaces in a single 64-pin QFN package.
The Microsemi
AcuEdge
Technology ZLS38040
license-free Firmware provides Acoustic Echo
Cancellation (AEC), noise reduction and a variety of
other voice enhancements to improve both the
intelligibility and subjective quality of voice in harsh
acoustic environments.
•
•
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SPI Slave port for host processor interface
Master SPI port for serial Flash interface
14 General Purpose Input/Output (GPIO) pins
•
Keypad Scanner (up to a 7x7 array)
•
•
General purpose UART port
Boots from SPI, UART, or Flash allowing easy
firmware updates
•
Can run unattended (controllerless), self-
booting into a configured operational state
•
•
Ultra-low and Standby off power
Full duplex operation supports AEC (up to
256 ms) in both Narrowband and Wideband
operation (8 kHz or 16 kHz respectively)
Psychoacoustic noise reduction
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•
Single microphone
Stationary noise reduction
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AGC/ALC
Dynamic Range Compression
Built-in support for G.712 and G.722
Single and Dual Tone Generation
CID Type 1 and 2 Detection
DTMF Detection
Call Progress Tone Detection
G.168 and G.169 compliant Line Echo
Cancellation (LEC)
MiTuner™
GUI Software
•
Automated AEC tuning
1
Performance
•
•
•
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AEC Tail Length: 256 ms
AEC sampling rate: 8 and 16 kHz
Single Talk TCLw: > 60 dB
Double Talk TCLw: > 40 dB
Double Talk Attenuation: < 3 dB
Noise reduction up to 30 dB
© 2014 Microsemi Corporation. All Rights Reserved.
ZL38040
Voice Processing Series Solution Overview
Product Brief
Designed for world-class high definition voice applications, Microsemi’s new ZL380 series of audio processors
features the company’s Microsemi
AcuEdge™
Technology. This innovative technology is a set of highly-complex
and integrated algorithms that allows the user to extract more information from the audio environment. The new
Microsemi
AcuEdge
Technology consists of license-free, royalty-free intelligent audio IP algorithms. When
combined with Microsemi’s highly-integrated ZL380 series of audio processors, the solution accelerates customers’
time-to-market via validated reference design and easy-to-use development tools including the Microsemi Audio
Interface Box (AIB) Kit which utilizes the
MiTuner™
GUI software.
Speaker 1
DAC1
Host Bus Interface
DSP
SPI Slave/I
2
C Slave
PCMA/I
2
SA
PCMB/I
2
SB
Flash
Speaker 2
DAC2
Integrated
Memory
Hardware
Accelerators
TDM
PCM/I
2
S
Digital
Mics
Decimation
Filter
Master SPI
PLL
Crystal
GPIO
Keypad
GPIO
Keypad Control
UART
UART
ZL38040 Block Diagram
The
ZL38040 Advanced Wideband Audio Processor
provides the following enhanced voice processing feature set.
2
© 2014 Microsemi Corporation. All Rights Reserved.
ZL38040
Microsemi ZL38040 Hardware
•
•
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•
Host Interface: SPI, UART, I
2
C
Standalone (controllerless) auto-boot from Flash
Two clock independent TDM ports (PCM or I
2
S)
14 GPIOs, configurable with built-in control features
Crystal-less operation (with a valid TDM clock)
Two digital microphone interfaces supporting three digital microphones
Dual 16-bit digital-to-analog converters (DACs)
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•
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Headphone amps capable of four single-ended or two differential outputs
Two independent headphone drivers
32 mW output drive power into 16 ohms
Impulse pop/click protection
Product Brief
Microsemi
AcuEdge™
Technology ZLS38040 Firmware
•
•
•
Wideband and Narrowband Acoustic Echo Cancellation
Initial convergence conditioning
Psychoacoustic noise reduction
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Single microphone
Stationary noise reduction
Keypad scanner
Low active power consumption
Multi-tone generation
DTMF detection
Call Progress Tone detection
Caller ID Type 1 & 2 detection
Signal mixing
•
44.1 kHz/48 kHz music mixed with 8 kHz/16 kHz voice
Howling detection/cancellation
Various encoding/decoding options:
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16-bit 2’s complement (linear)
G.711 A/μ law
G.722
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Send and receive path equalizers
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16-band for Narrowband mode
22-band for Wideband mode
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Comfort noise generation
44.1 kHz/48 kHz bypass mode
Configurable Cross-Point Switch
3
© 2014 Microsemi Corporation. All Rights Reserved.
ZL38040
AEC Auto-Tuning
Product Brief
To optimize the acoustic properties of a given system design, the Audio Processor firmware requires gain and level
tuning. The mechanical design, including the speaker and microphone quality and placement, will all affect the
system’s acoustic performance. Microsemi has developed
MiTuner™
GUI Software (ZLS38508) and the Microsemi
Audio Interface Box (AIB) hardware (ZLE38470) to automatically optimize the firmware’s tunable parameters for a
given hardware design, facilitating the system design process and eliminating the need for tedious manual tuning.
The
MiTuner
GUI Software provides step-by-step instructions that allow the software’s algorithms to achieve a high
level of acoustic performance for a given enclosure.
Highly Configurable for Multiple Applications
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Wideband Telepresence device (shown below)
Home Automation
Wideband phone
Application Example - Wideband Telepresence Unit
4
© 2014 Microsemi Corporation. All Rights Reserved.
ZL38040
Device Pinout - Top View
PCLKB/I2S_SCKB
GPIO_9/SM_CS
DXB/I2S_SDOB
DRB/I2S_SDIB
FSB/I2S_WSB
Product Brief
UART_RX
64 63 62
61 60 59 58 57 56 55
SM_CLK
SM_MISO
SM_MOSI
DVDD12
DVDD33
DAC1_M
DAC1_P
DAC2_P
DAC2_M
AVDD33
AVDD33
CDAC
CREF
DVDD12
RESET
VDD12_CTRL
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17 18 19
20 21
54 53 52 51 50 49
48
47
46
45
44
43
42
UART_TX
DVDD33
DVDD12
DVDD33
HDOUT
HCLK
HDIN
HINT
HCS
VSS
GPIO_13
GPIO_12
DVDD33
GPIO_11
GPIO_10
GPIO_8
DVDD12
GPIO_7
GPIO_6
GPIO_5
GPIO_4
GPIO_3
GPIO_2
DVDD33
GPIO_1
GPIO_0
Exposed Ground Pad
41
40
39
38
37
36
35
34
33
22 23 24 25 26 27 28 29 30 31 32
NC
DVDD33_XTAL
EXT_SEL
DMIC_IN1
DMIC_IN2
DVDD33
DVDD12
NC
NC
XI
XO
FSA/I2S_WSA
DRA/I2S_SDIA
Package Outline (64-Pin QFN)
5
© 2014 Microsemi Corporation. All Rights Reserved.
PCLKA/I2S_SCKA
DXA/I2S_SDOA
DMIC_CLK
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