Preliminary Information
MT9125
AAAAAAAAAA
AAAAAAAAAAAAAA
AA
A
AAAAAAAAAA
V
DD
AAAAAAAAAA
AAAAAAAAAA
AAAAAAAAAA
AAAAAAAAAA
AAAAAAAAAA
AAAAAAAAAA
AAAAAAAAAA
AAAAAAAAAA
DSTi DSTo
AAAAAAAAAA
AAAAAAAAAA
AAAAAAAAAA
AAAAAAAAAA
AAAAAAAAAA
AAAAAAAAAA
AAAAAAAAAA
AAAAAAAAAA
AAAAAAAAAA
AAAAAAAAAA
AAAAAAAAAA
FPib
AAAAAAAAAA
AAAAAAAAAA
AAAAAAAAAA
AAAAAAAAAA
AAAAAAAAAA
AAAAAAAAAA
AAAAAAAAAA
AAAAAAAAAA
AAAAAAAAAA
FPob
AAAAAAAAAA
AAAAAAAAAA
AAAAAAAAAA
AAAAAAAAAA
AAAAAAAAAA
AAAAAAAAAA
AAAAAAAAAA
AAAAAAAAAA
AAAAAAAAAA
AAAAAAAAAA
AAAAAAAAAA
AAAAAAAAAA
AAAAAAAAAA
AAAAAAAAAA
FPib
MT9125
MT8910
L
in
+
L
in
-
L
out
+
L
out
-
F0b
C4b
DSTo
DSTi
C4ib
C2o
BCLK
F0i
MCLK
ADPCMi
ADPCMo
ENA
FPob
FPb
System Frame pulse or
delayed frame pulse
from previous selection
EN1
EN2
DSTi
DSTo
ENB1
ENB2
ENS
MT8980
B Channel Switch
FPib
DSTi
DSTo
DSTi
C4ib
1
DSTo
C4ib
MT9125
C2o
BCLK
F0i
MCLK
ADPCMi
EN1
EN2
DSTi
DSTo
ENB1
ENB2
ENS
DSTo
DSTi
C4ib
7
DSTo
DSTi
C4ib
8
MT8980
C & D Channel
Switch
1/2 bandwidth
unusable
ADPCMo
ENA
FPob
AAAAAAAAA
AA
AAAAAAAAAA
AAAAAAAAAA
AAAAAAAAAA
AAAAAAAAAA
AAAAAAAAAA
AAAAAAAAAA
AAAAAAAAAA
FPib
AAAAAAAAAA
AAAAAAAAAA
AAAAAAAAAA
AAAAAAAAAA
AAAAAAAAAA
AAAAAAAAAA
AAAAAAAAAA
AAAAAAAAAA
AAAAAAAAAA
FPob
AAAAAAAAAA
AAAAAAAAAA
AAAAAAAAAA
AAAAAAAAAA
AAAAAAAAAA
AAAAAAAAAA
AAAAAAAAAAAAAA
AA
AAAAAAAAAA
A
Figure 10 - Application (ST-BUS Line Card)
V
DD
BIT CLOCK
ADPCM ENABLE
RFB1
MT89xx
T
L
out
F0b
C4b
DSTo
DSTi
MT9125
C2o
BCLK
F0i
MCLK
DSTi
DSTo
ENB1
ENB2
ENS
EN1
EN2
ADPCMi
ADPCMo
ENA
L
in
R
A
AAAAAAAAAAAAAAAAAAAAA
AA
A
AA
A
T
AA
L
in
A
AA
A
AA
A
AA
A
AA
A
AA
A
AA
A
AA
A
R
AA
L
out
A
AA
A
AAAAAAAAAAAAAAAAAAAAAA
AA
RFB2
The layer 1 device shown may be the 2-wire
MT8910 or MT8972 or the 4-wire MT8930.
2 Channel RF Section
B1
B3
B2
B1
B0
B3
B2
B2
B1
B0
B2
B2
B1
B0
B7
B6
B2
B5
B4
B3
B2
B1
B0
ADPCM nibbles concatenated into one 8
bit timeslot
B1
B7
B6
B1
B3
B2
B1
B0
X
X
X
X
B3
B2
B5
B4
B3
Normal ST-BUS channel assignment
B1
B0
X
X
X
X
In ADPCM by-pass mode (MS pin control)
the ADPCM nibbles are automatically
inserted into the most significant nibbles
of the 8-bit DSTi/o B1 and B2 bytes.
ENB1 (and ENA)
ENB2
Figure 11 - Application (2-Channel, Wireless-set, Base Station)
8-27
MITEL [ MITEL NETWORKS CORPORATION ]
