MT9315 Zarlink Semiconductor, MT9315 Datasheet - Page 10

• Manufacturer Part Number: MT9315
• Description: Acoustic Echo CANceller
• Manufacturer: Zarlink Semiconductor

Advance Information
ST-BUS Mode 3 supports connection to 2B+D devices where timeslots 0 and 1 transport D and C channels and echo canceller I/O
channels are assigned to ST-BUS timeslot 2. Both PORT1 and PORT2 must be configured in ST-BUS Mode 3.
ST-BUS Mode 4 allows 16 bit 2’s complement linear data to be transferred using ST-BUS I/O timing. Note that PORT1 and PORT2
need not necessarily both be in mode 4.
PORT2
C4i
F0i
Rin
PORT1
Sout
Sin
PORT2
Rout
C4i
F0i
Rin
Sout
Sin
Rout
PORT1
outputs = High impedance
outputs = High impedance
indicates that an input channel is bypassed to an output channel
inputs = don’t care
inputs = don’t care
Figure 5 - ST-BUS 8 Bit Companded PCM I/O with D and C channels (Mode 3)
S 14 13 12 11 10 9 8
S 14 13 12 11 10 9 8
S 14 13 12 11 10 9 8
S 14 13 12 11 10 9 8
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
Figure 6 - ST-BUS 16 Bit 2’s complement linear PCM I/O (Mode 4)
D
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
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
C
1
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
ECA
ECA
B
2
3
MT9315
4
9