MT9080BPR Zarlink Semiconductor, Inc., MT9080BPR Datasheet - Page 13

• Manufacturer Part Number: MT9080BPR
• Description: SMX-Switch, SMX-Switch Matrix Module
• Manufacturer: Zarlink Semiconductor, Inc.

Switching any input channel to an output channel
timeslot is possible by merely writing the address of
the input channel in the Connection Memory location
corresponding to the output channel timeslot. For
example, to switch channel 1 to output channel 5 and
enable
Connection
channel 5 should be loaded with Hex 2001. This
word will be clocked out of the Connection Memory
during timeslot 4 and will cause the Data Memory to
clock out contents of the memory corresponding to
channel 1 during the channel 5 timeslot. The 16 bit
word clocked out by the Connection Memory will also
enable Data Memory output drivers, and, external
drivers.
16.384 MHz
Notes:
1) U1 and U2 are required if the data output bus is to be enabled/disabled via the microprocessor interface.
2) All inputs not shown should be connected to Ground (V
Generator
Timing
output
DFP
CFP
C16
Memory
drivers
16
U1
C16
location
Figure 18 - 2048 Channel Timeslot Interchange Circuit
during
D0-D15i
CK
FP
Mz
R/W
ODE
corresponding
CNT/EXT
ME
SMX #1
channel
MEMORY
DATA
A0-A10
D0-D15o
11
CS
DS
Mx
My
C16
5,
SS
16
the
).
to
+5
CK
FP
D11
2048 Channel Switch Matrix
A
interchange switch can be constructed with three
SMXs as shown in Figure 18. SMX#1 and SMX#2
are used to store data and switch it in time, while the
third SMX functions as a Connection Memory.
SMX#1 and 2 are operated in the Counter Mode and
External Mode alternatively in consecutive frames. In
any specific frame, one of the two is in Counter mode
while the other is in External mode. The functions are
reversed in the successive frame. The SMX in
counter mode is programmed to write data
MPU Interface
CONNECTION
MEMORY
SMX #3
CM-2
U2
2048
D0o-D10o
C16
16
ODE
Mz
My
Mx
channel,
D0-D15i
CK
FP
Mz
R/W
ODE
ME
CNT/EXT
SMX #2
MEMORY
DATA
A0-A10
CMOS
+5
D0-D15o
double
11
CS
DS
Mx
My
buffered
MT9080B
+5
16
timeslot
Output
Data
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