MT93L04 Zarlink Semiconductor, MT93L04 Datasheet - Page 44

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

Echo Canceller A, Adaptation Step Size (MU) Register 2
Echo Canceller B, Adaptation Step Size (MU) Register 2
Echo Canceller A, Non-Linear Processor Threshold Register 2 Read/Write Address:
Echo Canceller B, Non-Linear Processor Threshold Register 2 Read/Write Address:
This register allows the user to program the level of the Non-Linear Processor Threshold (NLPTHR). The
16 bit 2’s complement linear value defaults to 0B60h = 0.0889 or -21.0 dB. The maximum value is 7FFFh =
0.9999 or 0 dB. The high byte is in Register 2 and the low byte is in Register 1.
This register allows the user to program the level of MU. MU is a 16 bit 2’s complement value which defaults
to 4000h = 1.0
The maximum value is 7FFFh or 1.9999 decimal. The high byte is in Register 2 and the low byte is in
Register 1.
Echo Canceller A, Adaptation Step Size (MU) Register 1
Echo Canceller B, Adaptation Step Size (MU) Register 1
Echo Canceller A, Non-Linear Processor Threshold Register 1 Read/Write Address:
Echo Canceller B, Non-Linear Processor Threshold Register 1 Read/Write Address:
Bit
WR_all
7
7
Main Control Register 0
NLP15
NLP7
MU15
MU7
7
7
7
7
ODE
6
WR_all
Name
NLP14
NLP6
MU6
MU14
6
MIRQ
6
6
6
5
NLP13
MTDBI
NLP5
MU13
MU5
4
5
5
Write all control bit: When high, Group 0-15 Echo Cancellers Registers are mapped
into 0000h to 0003Fh which is Group 0 address mapping. Useful to initialize the 16
Groups of Echo Cancellers as per Group 0.
When low, address mapping is per Figure 8.
Note: Only the Main Control Register 0 has the WR_all bit.
5
5
MTDAI
NLP12
3
NLP4
MU12
MU4
4
4
4
4
(EC group 0)
Format
2
NLP11
NLP3
MU11
MU3
3
3
3
3
LAW
1
Zarlink Semiconductor Inc.
NLP10
NLP2
MU2
MU10
PWUP
2
2
2
MT93L04
2
0
NLP9
44
NLP1
MU9
MU1
1
1
1
1
Reset Value:
Read/Write Address: 400
Description
NLP8
NLP0
MU8
MU0
0
0
0
0
Read/Write Address:
Read/Write Address:
Read/Write Address:
Read/Write Address:
(MU)
(NLPTHR)
(MU)
(NLPTHR)
00
H
H
.
Power Reset Value
Power Reset Value
19h
39h
18h
38h
1Bh
3Bh
1Ah
3Ah
Power Reset Value
Power Reset Value
+ Base Address
+ Base Address
+ Base Address
+ Base Address
+ Base Address
+ Base Address
+ Base Address
+ Base Address
0Bh
40h
60h
00h
Data Sheet