MT9125 Zarlink Semiconductor, MT9125 Datasheet - Page 12

• Manufacturer Part Number: MT9125
• Description: Dual Adpcm Transcoder
• Manufacturer: Zarlink Semiconductor

Preliminary Information
1/2 bandwidth
unusable
System Frame pulse or
delayed frame pulse
from previous selection
C & D Channel
B3
B7
B3
The layer 1 device shown may be the 2-wire
MT8910 or MT8972 or the 4-wire MT8930.
R
R
T
T
MT8980
Switch
L
L
L
L
B2
B6
B2
in
in
out
out
MT8910
+
-
FPb
B1
B1
FPob
+
-
B1
B1
B5
ENB1 (and ENA)
DSTo
DSTi
C4b
F0b
B0
B4
B0
B1
L
L
L
L
in
out
B3
MT89xx
in
out
B3
X
Figure 11 - Application (2-Channel, Wireless-set, Base Station)
C4ib
B2
B2
X
DSTo
DSTi
C4b
F0b
B2
B1
B1
X
Figure 10 - Application (ST-BUS Line Card)
B0
B0
X
C2o
BCLK
F0i
MCLK
ADPCMi
ADPCMo
ENA
C2o
BCLK
F0i
MCLK
ADPCMi
ADPCMo
ENA
B7
B3
MT9125
MT9125
B6
B2
B2
ENB1
ENB2
DSTo
ENB1
ENB2
DSTo
DSTi
ENS
DSTi
B1
ENS
B5
EN1
EN2
EN1
EN2
DSTi
DSTo
C2o
BCLK
F0i
MCLK
ENB1
ENB2
B4
B0
MT9125
V
ENB2
DD
B2
B3
ADPCMi
ADPCMo
X
DSTi DSTo
ENS
EN1
EN2
ENA
B2
X
V
B1
DD
X
B0
X
ADPCM nibbles concatenated into one 8
bit timeslot
Normal ST-BUS channel assignment
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.
FPob
FPob
FPib
FPib
FPib
FPob
2 Channel RF Section
BIT CLOCK
ADPCM ENABLE
DSTo
DSTo
DSTo
DSTi
C4ib
DSTi
C4ib
DSTi
C4ib
1
FPib
7
RFB1
RFB2
8
DSTi
B Channel Switch
MT8980
MT9125
DSTo
C4ib
8-83