MT9122 Zarlink Semiconductor, MT9122 Datasheet - Page 13

• Manufacturer Part Number: MT9122
• Description: Dual Voice Echo CANceller (ITU-T G165 Compliant) With Disable Tone Detection
• Manufacturer: Zarlink Semiconductor

Data Sheet
In ST-BUS Mode 1, both echo canceller I/O channels are assigned to ST-BUS timeslots 0 and 1. Note that the user
could configure PORT1 and PORT2 into different ST-BUS modes. The pin F0od is always delayed 4 time slots to
permit a more flexible interleave of ST-BUS modes.
In ST-BUS Mode 2, both echo canceller I/O channels are assigned to ST-BUS timeslots 2 and 3. Note that the user
could configure PORT1 and PORT2 into different ST-BUS modes. The pin F0od is always delayed 4 time slots to
permit a more flexible interleave of ST-BUS modes.
C4i
F0i
F0od
PORT1
Rin
Sout
PORT2
Sin
Rout
C4i
F0i
F0od
PORT1
Rin
Sout
PORT2
Sin
Rout
outputs=High impedance
outputs=High impedance
inputs = don’t care
inputs = don’t care
Figure 5 - ST-BUS 8 Bit Companded PCM I/O on Timeslots 0 & 1 (Mode 1)
Figure 6 - ST-BUS 8 Bit Companded PCM I/O on Timeslots 2 & 3 (Mode 2)
7 6 5 4
7 6 5 4
7 6 5 4
7 6 5 4
0
ECA
ECA
0
3 2 1 0
3 2 1 0
3 2 1 0
3 2 1 0
7 6 5 4 3 2 1 0
7 6 5 4 3 2 1 0
7 6 5 4 3 2 1 0
7 6 5 4 3 2 1 0
1
ECB
ECB
1
7 6 5 4
7 6 5 4
7 6 5 4
7 6 5 4
ECA
ECA
3 2 1 0
3 2 1 0
3 2 1 0
3 2 1 0
2
2
7 6 5 4 3 2 1 0
7 6 5 4 3 2 1 0
7 6 5 4 3 2 1 0
7 6 5 4 3 2 1 0
ECB
ECB
3
3
MT9122
4
4
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