MT93L04 Zarlink Semiconductor, MT93L04 Datasheet - Page 35

• Manufacturer Part Number: MT93L04
• Description: 128-channel Voice Echo Canceller
• Manufacturer: Zarlink Semiconductor

Register Descriptions
Reset
Reset
Bit
7
6
5
4
3
2
1
0
7
7
Echo Canceller A, Control Register A1
Echo Canceller B, Control Register B1
INJDis
INJDis
6
6
Bypass
AdpDis
INJDis
Name
Reset
0 or 1
ExtDl
BBM
PAD
BBM
BBM
or
0
5
5
PAD
PAD
4
4
When high, the power-up initialization is executed which presets all register bits
including this bit and clears the Adaptive Filter coefficients.
When high, the noise injection process is disabled. When low noise injection is
enabled.
When high the Back to Back configuration is enabled.
When low the Normal configuration is enabled.
Note: Do not enable Extended-Delay and BBM configurations at the same time.
Always set both BBM bits of the two echo cancellers (Control Register A1 and
Control Register B1) of the same group to the same logic value to avoid conflict.
When high, 12 dB of attenuation is inserted into the Rin to Rout path.
When low the Rin to Rout path gain is 0 dB.
When high, Sin data is by-passed to Sout and Rin data is by-passed to Rout. The
Adaptive Filter coefficients are set to zero and the filter adaptation is stopped.
When low, output data on both Sout and Rout is a function of the echo canceller
algorithm.
When high, echo canceller adaptation is disabled. The MT93L00 cancels echo.
When low, the echo canceller dynamically adapts to the echo path characteristics.
Bits marked as “1” or “0” are reserved bits and should be written as indicated.
When high, Echo Cancellers A and B of the same group are internally cascaded into
one 128 ms echo canceller.
When low, Echo Cancellers A and B of the same group operate independently.
Note: Do not enable both Extended-Delay and BBM configurations at the same time.
Control Register B1 bit-0 is a reserved bit and should be written “0”.
Bypass
Bypass
3
3
AdpDis
AdpDis
2
2
1
1
0
1
Zarlink Semiconductor Inc.
ExtDl
0
0
0
MT93L04
35
Read/Write Address: 00
Reset Value:
Read/Write Address: 20
Reset Value:
Description
00
02
H
H
H
H
.
.
+ Base Address
+ Base Address
Data Sheet