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參數(shù)資料
| 型號(hào)： | MT93L16 |
| 廠商： | Mitel Networks Corporation |
| 英文描述： | Low-Voltage Acoustic Echo Canceller(低電壓回聲消除器) |
| 中文描述： | 低電壓聲回波消除器（低電壓回聲消除器） |
| 文件頁數(shù)： | 18/27頁 |
| 文件大?。?/td> | 118K |
| 代理商： | MT93L16 |
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MT93L16
Preliminary Information
18
Register Summary
Address:
00h R/W
Main Control Register (MC)
Power Up
Reset 00h
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 complete.
AH-
When high, the Howling detector is disabled and when low the Howling detector is enabled.
AGC-
When high, AGC is disabled and when low AGC is enabled.
NB-
When high, Narrowband signal detectors in Rin and Sin paths are disabled and when low the signal detectors are enabled
BYPASS
When high, the Send and Receive paths are transparently by-passed from input to output and when low the Send and
Receive paths are not bypassed
MUTE_S
When high, the Sin path is muted to quite code (after the NLP) and when low the Sin path is not muted
MUTE_R
When high, the Rin path is muted to quite code (after the NLP) and when low the Rin path is not muted
LIMIT
When high, the 2-bit shift mode is enabled in conjunction with bit 7 of LEC register and when low 2-bit shift mode is
disabled
Address:
21h R/W
Acoustic Echo Canceller Control Register (AEC)
Power Up
Reset 00h
ECBY
When high, the Echo estimate from the filter is not subtracted from the input (Sin), when low the estimate is subtracted
ADAPT-
When high, the Echo canceller adaptation is disabled and when low the adaptation is enabled
HCLR
When high, Adaptive filter coefficients are cleared and when low the filter coefficients are not cleared
HPF-
When high, Offset nulling filter is bypassed in the Sin/Sout path and when low the Offset nulling filter in not bypassed
INJ-
When high, the Noise filtering process is disabled in the NLP and when low the Noise filtering process is enabled
NLP-
When high, the Non Linear Processor is disabled in the Sin/Sout path and when low the NLP is enabled
ASC-
When high, the Internal Adaptation speed control is disabled and when low the Adaptation speed is enabled
P-
When high, the Exponential weighting function for the adaptive filter is disabled and when low the weighting function is
enabled
Address:
01h R/W
Line Echo Canceller Control Register (LEC)
Power Up
Reset 00h
ECBY
When high, the Echo estimate from the filter is not substracted from the input (Rin), when low the estimate is substracted
ADAPT-
When high, the Echo canceller adaptation is disabled and when low the adaptation is enabled
HCLR
When high, Adaptive filter coefficients are cleared and when low the filter coefficients are not cleared
HPF-
When high, Offset nulling filter is bypassed in the Rin/Rout path and when low the Offset nulling filter in not bypassed
INJ-
When high, the Noise filtering process is disabled in the NLP and when low the Noise filtering process is enabled
NLP-
When high, the Non Linear Processor is disabled in the Rin/Rout path and when low the NLP is enabled
ASC-
When high, the Internal Adaptation speed control is disabled and when low the Adaptation speed is enabled
SHFT
when high the 16-bit linear mode, inputs Sin, Rin, are shift right by 2 and outputs Sout, Rout are shift left by 2. This bit is
ignored when 16-bit linear mode is not selected in both ports. This bit is also ignored if bit 7 of MC register is set to zero
7
6
5
0
4
3
1
2
LIMIT
MUTE_R
MUTE_S
BYPASS
NB-
AGC-
AH-
RESET
LSB
MSB
7
6
5
0
4
3
1
2
P-
ASC-
NLP-
INJ-
HPF-
HCLR
ADAPT-
ECBY
LSB
MSB
7
6
5
0
4
3
1
2
SHFT
ASC-
NLP-
INJ-
HPF-
HCLR
ADAPT-
ECBY
LSB
MSB
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