MT9300
Advance Information
Echo Canceller A, Double-Talk Detection Threshold Register 2 Read/Write Address: 15h + Base Address
Echo Canceller B, Double-Talk Detection Threshold Register 2 Read/Write Address: 35h + Base Address
Power Reset Value
7
6
5
4
3
2
1
0
48h
DTDT
DTDT
DTDT
DTDT
DTDT
DTDT
DTDT
DTDT
8
(DTDT)
15
14
13
12
11
10
9
Echo Canceller A, Double-Talk Detection Threshold Register 1 Read/Write Address: 14h + Base Address
Echo Canceller B, Double-Talk Detection Threshold Register 1
Read/Write Address: 34h + Base Address
7
6
5
4
3
2
1
0
Power Reset Value
00h
DTDT
DTDT
DTDT
DTDT
DTDT
DTDT
DTDT
DTDT
0
(DTDT)
7
6
5
4
3
2
1
This register allows the user to program the level of Double-Talk Detection Threshold (DTDT). The 16 bit 2’s complement linear
value defaults to 4800h= 0.5625 or -5dB. 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.
Echo Canceller A, Non-Linear Processor Threshold Register 2 Read/Write Address: 19h + Base Address
Echo Canceller B, Non-Linear Processor Threshold Register 2 Read/Write Address: 39h + Base Address
Power Reset Value
7
6
5
4
3
2
1
0
0Bh
NLP
NLP
NLP
NLP
NLP
NLP
NLP
NLP
8
15
14
13
12
11
10
9
(NLPTHR)
Echo Canceller A, Non-Linear Processor Threshold Register 1 Read/Write Address: 18h + Base Address
Echo Canceller B, Non-Linear Processor Threshold Register 1 Read/Write Address: 38h + Base Address
7
6
5
4
3
2
1
0
Power Reset Value
60h
NLP
NLP
NLP
NLP
NLP
NLP
NLP
NLP
0
(NLPTHR)
7
6
5
4
3
2
1
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 -21.0dB. 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.
Echo Canceller A, Adaptation Step Size (MU) Register 2
Echo Canceller B, Adaptation Step Size (MU) Register 2
Read/Write Address: 1Bh + Base Address
Read/Write Address: 3Bh + Base Address
Power Reset Value
40h
7
6
5
4
3
2
1
0
MU
MU
MU
MU
MU
MU
MU
MU
8
15
14
13
12
11
10
9
(MU)
Echo Canceller A, Adaptation Step Size (MU) Register 1
Echo Canceller B, Adaptation Step Size (MU) Register 1
Read/Write Address: 1Ah + Base Address
Read/Write Address: 3Ah + Base Address
7
6
5
4
3
2
1
0
Power Reset Value
00h
MU
MU
MU
MU
MU
MU
MU
MU
0
7
6
5
4
3
2
1
(MU)
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.
18
MITEL [ MITEL NETWORKS CORPORATION ]
