MT9123 Datasheet, PDF (2/32 Pages) Mitel Networks Corporation – CMOS Dual Voice Echo Canceller

MT9123
Preliminary Information
ENA1
ENB1
ENA2
ENB2
Rin
Sin
VSS
MCLK
IC1
NLP
IC2
LAW
FORMAT
PWRDN
1
28
2
27
3
26
4
25
5
24
6 ^PDIP ₂₃
7
22
8
21
9
20
10
19
11
18
12
17
13
16
14
15
CONFIG2
CONFIG1
BCLK/C4i
F0i
Rout
Sout
VDD
F0od
S1/DATA1
S2/DATA2
S3/CS
S4/SCLK
IC4
IC3
Rin 5
Sin 6
VSS 7
MCLK 8
IC1 9
NLP 10
IC2 11
•
PLCC
25 F0i
24 Rout
23 Sout
22 VDD
21 F0od
20 S1/DATA1
19 S2/DATA2
Figure 2 - Pin Connections
Pin Description
Pin #
1
Name
ENA1
Description
SSI Enable Strobe / ST-BUS Mode for Rin/Sout (Input). This pin has dual functions
depending on whether SSI or ST-BUS is selected.
For SSI, this strobe must be present for frame synchronization. This is an active high channel
enable strobe, 8 or 16 data bits wide, enabling serial PCM data transfer for Echo Canceller A
on Rin/Sout pins. Strobe period is 125 microseconds.
For ST-BUS, this pin, in conjunction with the ENB1 pin, will select the proper ST-BUS mode for
Rin/Sout pins (see ST-BUS Operation description). The selected mode applies to both Echo
Canceller A and B.
2
ENB1 SSI Enable Strobe / ST-BUS Mode for Rin/Sout (Input). This pin has dual functions
depending on whether SSI or ST-BUS is selected.
For SSI, this is an active high channel enable strobe, 8 or 16 data bits wide, enabling serial
PCM data transfer for Echo Canceller B on Rin/Sout pins. Strobe period is 125 microseconds.
For ST-BUS, this pin, in conjunction with the ENA1 pin, will select the proper ST-BUS mode for
Rin/Sout pins (see ST-BUS Operation description). The selected mode applies to both Echo
Canceller A and B.
3
ENA2 SSI Enable Strobe / ST-BUS Mode for Sin/Rout (Input). This pin has dual functions
depending on whether SSI or ST-BUS is selected.
For SSI, this is an active high channel enable strobe, 8 or 16 data bits wide, enabling serial
PCM data transfer for Echo Canceller A on Sin/Rout pins. Strobe period is 125 microseconds.
For ST-BUS, this pin, in conjunction with the ENB2 pin, will select the proper ST-BUS mode for
Sin/Rout pins (see ST-BUS Operation description). The selected mode applies to both Echo
Canceller A and B.
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