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參數(shù)資料
| 型號： | MT9123AE |
| 廠商： | Mitel Networks Corporation |
| 英文描述： | CMOS Dual Voice Echo Canceller |
| 中文描述： | CMOS雙語音回聲消除器 |
| 文件頁數(shù)： | 3/32頁 |
| 文件大?。?/td> | 191K |
| 代理商： | MT9123AE |
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Preliminary Information
MT9123
8-47
4
ENB2
SSI Enable Strobe / ST-BUS Mode for Sin/Rout (Input)
. This pin has dual functions
depending on whether SSI or ST-BUS is selected.
For SSI, this is an active high channel enable strobe, 8 or 16 data bits wide, enabling serial
PCM data transfer for Echo Canceller B on Sin/Rout pins. Strobe period is 125 microseconds.
For ST-BUS, this pin, in conjunction with the ENA2 pin, will select the proper ST-BUS mode for
Sin/Rout pins (see ST-BUS Operation description). The selected mode applies to both Echo
Canceller A and B.
5
Rin
Receive PCM Signal Input (Input).
128 kbit/s to 4096 kbit/s serial PCM input stream. Data
may be in either companded or 2’s complement linear format. Two PCM channels are time-
multiplexed on this pin. These are the Receive Input reference channels for Echo Cancellers
A and B. Data bits are clocked in following SSI or ST-BUS timing requirements.
6
Sin
Send PCM Signal Input (Input).
128 kbit/s to 4096 kbit/s serial PCM input stream. Data may
be in either companded or 2’s complement linear format. Two PCM channels are time-
multiplexed on this pin. These are the Send Input channels (after echo path) for Echo
Cancellers A and B. Data bits are clocked in following SSI or ST-BUS timing requirements.
7
VSS
Digital Ground.
Nominally 0 volts.
8
MCLK
Master Clock (Input).
Nominal 20 MHz Master Clock input. May be connected to an
asynchronous (relative to frame signal) clock source.
9
IC1
Internal Connection 1 (Input).
Must be tied to Vss.
10
NLP
Non-Linear Processor Control (Input).
Controllerless Mode
:
An active high enables the Non-Linear Processors in Echo Cancellers A
and B. Both NLP’s are disabled when low. Intended for conformance testing to G.165 and it is
usually tied to Vdd for normal operation.
Controller Mode
:
This pin is ignored (tie to Vdd or Vss). The non-linear processor operation is
controlled by the NLPDis bit in Control Register 2. Refer to the Register Summary.
11
IC2
Internal Connection 2 (Input).
Must be tied to Vss.
12
LAW
A/
μ
Law Select (Input).
An active low selects
μ
Law companded PCM. When high, selects
A-Law companded PCM. This control is for both echo cancellers and is valid for both
controller and controllerless modes.
13
FORMAT ITU-T/Sign Mag (Input).
An active low selects sign-magnitude PCM code. When high,
selects ITU-T (G.711) PCM code. This control is for both echo cancellers and is valid for both
controller and controllerless modes.
14
PWRDN
Power-down (Input).
An active low resets the device and puts the MT9123 into a low-power
stand-by mode.
15
IC3
Internal Connection 3 (Output).
Must be left unconnected.
16
IC4
Internal Connection 4 (Output).
Must be left unconnected.
17/18
17
18
S4/S3
SCLK
CS
Selection of Echo Canceller B Functional States (Input).
Controllerless Mode: Selects Echo Canceller B functional states according to Table 2.
Controller Mode: S4 and S3 pins become SCLK and CS pins respectively.
Serial Port Synchronous Clock (Input).
Data clock for the serial microport interface.
Chip Select (Input).
Enables serial microport interface data transfers. Active low.
Pin Description (continued)
Pin #
Name
Description
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| MT9123 | Dual Voice Echo Canceller(雙話音回聲消除器) |
| MT9123AP | CMOS Dual Voice Echo Canceller |
| MT9125AE | CMOS Dual ADPCM Transcoder |
| MT9125AP | CMOS Dual ADPCM Transcoder |
| MT9126AE | CMOS Quad ADPCM Transcoder |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MT9123AE1 | 制造商:Microsemi Corporation 功能描述: |
| MT9123AP | 制造商:MITEL 制造商全稱:Mitel Networks Corporation 功能描述:CMOS Dual Voice Echo Canceller |
| MT9123AP1 | 制造商:Microsemi Corporation 功能描述:ECHO Canceller Chip 2-CH G.165/G.711 With Tone Detection 28-Pin PLCC Tube 制造商:Microsemi Corporation 功能描述:ECHO CANCELLER CHIP 2CH G.165/G.711 W/OUT TONE DETECTION 28P - Rail/Tube 制造商:MICROSEMI CONSUMER MEDICAL PRODUCT GROUP 功能描述:IC ECHO CANCELLER DUAL 28PLCC 制造商:Microsemi Corporation 功能描述:IC ECHO CANCELLER DUAL 28PLCC |
| MT9123APR1 | 制造商:Microsemi Corporation 功能描述:ECHO CANCELLER CHIP 2CH G.165/G.711 W/OUT TONE DETECTION 28P - Tape and Reel 制造商:Zarlink Semiconductor Inc 功能描述:ECHO CANCELLER CHIP 2CH G.165/G.711 W/OUT TONE DETECTION 28P - Tape and Reel |
| MT9125 | 制造商:MITEL 制造商全稱:Mitel Networks Corporation 功能描述:CMOS Dual ADPCM Transcoder |
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