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參數(shù)資料
| 型號： | MT9122AE |
| 廠商： | Mitel Networks Corporation |
| 英文描述： | CMOS Dual Voice Echo Canceller with Tone Detection |
| 中文描述： | CMOS雙語音回聲消除的音偵測 |
| 文件頁數(shù)： | 3/32頁 |
| 文件大?。?/td> | 143K |
| 代理商： | MT9122AE |
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Preliminary Information
MT9122
8-19
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
IC
Internal Connection (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
REV
Reversal Detection (Input):
Controllerless Mode
:
An active high configures all the tone detectors to trigger only when a
2100Hz disable tone with periodic phase reversal is present (per G.165). When low, the tone
detectors will trigger upon detection of any 2100Hz disable tone, with or without periodic
phase reversal (per G.164).
Controller Mode
:
This pin is ignored (tie to VDD or VSS). The operation is controlled by the
PHDis bit in Control Register 2. Refer to the Register Summary.
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 MT9122 into a low-power
stand-by mode.
15
TD2
Tone Detect 2 (Output):
An active low output occurs when Echo Canceller B detects the presence of a valid 2100Hz
disabling tone (G.164 or G.165) on Rin or Sin pins. This output returns to a logic high once the
release criteria are met. The behavior of this pin is identical in both controller and
controllerless modes.
16
TD1
Tone Detect 1 (Output):
An active low output occurs when Echo Canceller A detects the presence of a valid 2100Hz
disabling tone (G.164 or G.165) on Rin or Sin pins. This output returns to a logic high once the
release criteria are met. The behavior of this pin is identical in both controller and
controllerless modes.
Pin Description (continued)
Pin #
Name
Description
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| MT9122AP | CMOS Dual Voice Echo Canceller with Tone Detection |
| MT9123AE | CMOS Dual Voice Echo Canceller |
| MT9123 | Dual Voice Echo Canceller(雙話音回聲消除器) |
| MT9123AP | CMOS Dual Voice Echo Canceller |
| MT9125AE | CMOS Dual ADPCM Transcoder |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MT9122AP | 制造商:Microsemi Corporation 功能描述: |
| MT9122AP1 | 制造商:Zarlink Semiconductor Inc 功能描述:ECHO CANCELLER CHIP 2CH G.164/G.165/G.711 W/ TONE DETECTION - Rail/Tube 制造商:Zarlink Semiconductor Inc 功能描述:PB FREE DUAL VOICE ECHO CANCELLER W/TD |
| MT9122APR1 | 制造商:Zarlink Semiconductor Inc 功能描述:ECHO CANCELLER CHIP 2CH G.164/G.165/G.711 W/ TONE DETECTION - Tape and Reel |
| MT9123 | 制造商:MITEL 制造商全稱:Mitel Networks Corporation 功能描述:CMOS Dual Voice Echo Canceller |
| MT9123AE | 制造商:Microsemi Corporation 功能描述:ECHO CANCELLER CHIP 2CH G.165/G.711 W/OUT TONE DETECTION 28P - Rail/Tube |
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