MT9315AE Zarlink Semiconductor, MT9315AE Datasheet

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MT9315AE

Manufacturer Part Number
MT9315AE
Description
MT9315 - Acoustic Echo CANceller
Manufacturer
Zarlink Semiconductor
Datasheet
Features
Sin
MD1
MD2
Rout
Contains two echo cancellers: 112ms acoustic
echo canceller + 16ms line echo canceller
Works with low cost voice codec. ITU-T G.711
or signed mag /A-Law, or linear 2’s comp
Each port may operate in different format.
Advanced NLP design - full duplex speech with
no switched loss on audio paths
Fast re-convergence time: tracks changing
echo environment quickly
Adaptation algorithm converges even during
Double-Talk
Designed for exceptional performance in high
background noise environments
Provides protection against narrow-band signal
divergence
Howling prevention stops uncontrolled
oscillation in high loop gain conditions
Offset nulling of all PCM channels
Serial micro-controller interface
ST-BUS or variable-rate SSI PCM interfaces
User gain control provided for speaker path
(-24dB to +21dB in 3dB steps)
AGC on speaker path
VDD
Linear
/A-Law/
L
/A-Law
inear/
VSS
NBSD
Offset
Null
PWRDN
Limiter
S
Adaptive
1
Filter
AGC
+
Figure 1 - Functional Block Diagram
FORMAT
+
-24 -> +21dB
R
-
3
User
Gain
S
2
ENA2
CONTROL
UNIT
Detector
Double
Talk
ADV
NLP
ADV
NLP
DS5038
Applications
ENA1
R
Limiter
2
Handles up to 0 dB acoustic echo return loss
and 0dB line ERL
Transparent data transfer and mute options
20 MHz master clock operation
Low power mode during PCM Bypass
Full duplex speaker-phone for digital telephone
Echo cancellation for video conferencing
Handsfree in automobile environment
Full duplex speaker-phone for PC
S
3
MT9315AP
MT9315AE
-
Adaptive
+
LAW
Filter
R
+
1
Ordering Information
Acoustic Echo Canceller
F0i
-40 C to + 85 C
NBSD
Interface
Controller
Micro
Howling
BCLK/C4i
Advance Information
Offset
ISSUE 3
Null
CMOS
Linear/
/A-Law
28 Pin PLCC
28 Pin PDIP
MCLK
Linear
/A-Law/
MT9315
February 1999
DATA2
DATA1
Sout
SCLK
CS
Rin
1

Related parts for MT9315AE

MT9315AE Summary of contents

Page 1

... Rout /A-Law Limiter VSS VDD PWRDN DS5038 MT9315AP MT9315AE • Handles acoustic echo return loss and 0dB line ERL • Transparent data transfer and mute options • 20 MHz master clock operation • Low power mode during PCM Bypass Applications • ...

Page 2

MT9315 1 ENA1 2 MD1 ENA2 3 4 MD2 5 Rin PDIP Sin 6 7 VSS 8 MCLK LAW 13 FORMAT 14 PWRDN Pin Description Pin # Name 1 ENA1 SSI Enable Strobe ...

Page 3

Advance Information Pin Description (continued) Pin # Name 13 FORMAT ITU-T/Sign Mag (Input). When low, selects sign-magnitude PCM code. When high, selects ITU-T (G.711) PCM code. This control is for both serial pcm ports. 14 PWRDN Power-down (Input). An active ...

Page 4

MT9315 Functional Description The MT9315 device contains two echo cancellers, as well as the many control functions necessary to operate the echo cancellers. One canceller is for acoustic speaker to microphone echo, and one for line echo cancellation. The MT9315 ...

Page 5

Advance Information 4 Howling Detector (HWLD) (4. Patent Pending) The Howling detector is part of an Anti-Howling control, designed to prevent oscillation as a result of positive feedback in the audio paths. The HWLD can be disabled by setting the ...

Page 6

MT9315 Power Down Forcing the PWRDN pin to logic low, will put the MT9315 into a power down state. In this state all internal clocks are halted, the DATA1, Sout and Rout pins are tristated. The user should hold the ...

Page 7

Advance Information Sign-Magnitude FORMAT=0 PCM Code /A-LAW -LAW LAW = LAW = 0 + Full Scale 1111 1111 1000 0000 + Zero 1000 0000 1111 1111 - Zero 0000 0000 0111 1111 - Full Scale 0111 1111 ...

Page 8

MT9315 C4i F0i PORT1 Rin Sout PORT2 Sin ...

Page 9

Advance Information C4i F0i 0 D PORT1 Rin Sout PORT2 Sin ...

Page 10

MT9315 BCLK PORT1 ENA1 Rin Sout PORT2 ENA2 Sin Rout outputs = High impedance inputs = don’t care Note that the two ports are independent so that, for example, PORT1 can operate with 8 bit enable strobes and PORT2 can ...

Page 11

Advance Information COMMAND/ADDRESS DATA 2 R Receive DATA 1 High Impedance Transmit SCLK CS This delay is due to internal processor timing and is equal to Tsch time. The delay is transparent to MT9315. The MT9315: latches ...

Page 12

MT9315 Absolute Maximum Ratings* Parameter 1 Supply Voltage 2 Input Voltage 3 Output Voltage Swing 4 Continuous Current on any digital pin 5 Storage Temperature 6 Package Power Dissipation * Exceeding these values may cause permanent damage. Functional operation under ...

Page 13

Advance Information DC Electrical Characteristics* Characteristics 11 Input capacitance 12 PWRDN Positive Threshold Voltage Hysteresis Negative Threshold Voltage ‡ Typical figures are and are for design aid only: not guaranteed and not subject to production testing. *DC ...

Page 14

MT9315 AC Electrical Characteristics Characteristics 1 Input Data Setup 2 Input Data Hold 3 Output Data Delay 4 Serial Clock Period 5 SCLK Pulse Width High 6 SCLK Pulse Width Low 7 CS Setup-Intel 8 CS Setup-Motorola 9 CS Hold ...

Page 15

Advance Information Bit 0 (1) Sout/Rout (2) BCLK SSS V (2) ENA1/ENA2 H or (2) V ENB1/ENB2 L Bit (3) Rin/Sin V L Notes: 1. CMOS output 2. TTL input ...

Page 16

MT9315 (1, 2) DATA1 V H (2) SCLK CSSI Notes: 1. CMOS output 2. TTL input compatible 3. CMOS input (see Table 8 for symbol definitions (2) DATA2 ...

Page 17

Advance Information Register Summary Address: 00h R Power Up LIMIT MUTE_R Reset 00h MSB RESET When high, the power initialization routine is executed presetting all registers to default values. This bit automatically clears itself to’0’ when reset is ...

Page 18

MT9315 Address: Acoustic Echo Canceller Status Register 22h Read 7 6 Power Up - ACMUND Reset 00h MSB NBS When high, the Narrowband signal has been detected in the Sin/Sout path and when low, the Narrowband signal has not been ...

Page 19

Advance Information Address: 16h Read 7 6 Power Up RIPD RIPD 7 Reset 00h MSB RIPD 0 RIPD 1 These peak detector registers allow the user to monitor the receive in signal (Rin) peak level at reference point R1 (see ...

Page 20

MT9315 Address: Receive (Rin) ERROR Peak Detect Register 19h Read 7 6 Power Up REPD REPD 15 Reset 00h MSB REPD8 REPD9 See above description REPD10 REPD11 REPD12 REPD13 REPD14 REPD15 Address: Receive (Rout) Peak Detect Register 3Ah Read 7 ...

Page 21

Advance Information Address: 36h Read 7 6 Power Up SIPD SIPD 7 Reset 00h MSB SIPD 0 SIPD 1 These peak detector registers allow the user to monitor the receive in signal (Sin) peak level at reference point S1 (see ...

Page 22

MT9315 Address: Send ERROR Peak Detect Register 39h Read 7 6 Power Up SEPD SEPD 15 Reset 00h MSB SEPD8 SEPD9 SEPD10 SEPD11 See Above description SEPD12 SEPD13 SEPD14 SEPD15 Address: 1Ah Read 7 6 Power Up SOPD SOPD 7 ...

Page 23

Advance Information Address: Acoustic Echo Canceller Adaptation Speed Register 3Ch R Power Up A_AS A_AS 7 Reset 00h MSB A_AS 0 This register allows the user to program control the adaptation speed of the Acoustic Echo Canceller. This ...

Page 24

MT9315 Address: Line Echo Canceller Adaptation Speed Register 1Dh R Power Up L_AS L_AS 15 Reset 08h MSB L_AS 8 L_AS 9 L_AS 10 See Above description L_AS 11 L_AS 12 L_AS 13 L_AS 14 L_AS 15 Address: ...

Page 25

Advance Information Address: 26h R Power Reset 3Dh MSB - - RESERVED - L 0 This register allows the user to program the output Limiter threshold value in the Rout path L 1 ...

Page 26

Package Outlines Notes Not to scale 2) Dimensions in inches 3) (Dimensions in millimeters) Plastic Dual-In-Line Packages (PDIP Suffix 8-Pin DIM Plastic Min Max A 0.210 (5.33) A 0.115 (2.92) ...

Page 27

Notes Not to scale 2) Dimensions in inches 3) (Dimensions in millimeters) Plastic Dual-In-Line Packages (PDIP Suffix 22-Pin DIM Plastic Min Max A 0.210 (5.33) A 0.125 (3.18) 0.195 ...

Page 28

Package Outlines Dim D General- (lead coplanarity) A Notes Not ...

Page 29

... For more information about all Zarlink products Information relating to products and services furnished herein by Zarlink Semiconductor Inc. trading as Zarlink Semiconductor or its subsidiaries (collectively “Zarlink”) is believed to be reliable. However, Zarlink assumes no liability for errors that may appear in this publication, or for liability otherwise arising from the application or use of any such information, product or service or for any infringement of patents or other intellectual property rights owned by third parties which may result from such application or use ...

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