■ ML53612 ■ ––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––
5.7 Stream Switch Connection Mapping
Input Data
Stream Rate
Output Data
Stream Rate
Partition
Time-Slot Connection
0 to 1, 1 to 2, 2 to 3, … , 31 to 0
2 Mbps
2 Mbps
4 Mbps
0
0
1
0
1
2
3
0
1
0
0
1
0
1
2
3
0
1
0
0 to 2, 1 to 4, 2 to 6, … , 31 to 0
0 to 3, 1 to 5, 2 to 7, … , 31 to 1
0 to 4, 1 to 8, 2 to 12, … , 31 to 0
0 to 5, 1 to 9, 2 to 13, … , 31 to 1
0 to 6, 1 to 10, 2 to 14, … , 31 to 2
0 to 7, 1 to 11, 2 to 15, … , 31 to 3
0 to 1, 2 to 2, 4 to 3, … , 62 to 0
1 to 1, 3 to 2, 5 to 3, … , 63 to 0
0 to 1, 1 to 2, 2 to 3, … , 63 to 0
0 to 2, 1 to 4, 2 to 6, … , 63 to 0
0 to 3, 1 to 5, 2 to 7, … , 63 to 1
0 to 1, 4 to 2, 8 to 3, … , 124 to 0
1 to 1, 5 to 2, 9 to 3, … , 125 to 0
2 to 1, 6 to 2, 10 to 3, … , 126 to 0
3 to 1, 7 to 2, 11 to 3, … , 127 to 0
0 to 1, 2 to 2, 4 to 3, … , 126 to 0
1 to 1, 3 to 2, 5 to 3, … , 127 to 0
0 to 1, 1 to 2, 2 to 3, … , 127 to 0
8 Mbps
4 Mbps
8 Mbps
2 Mbps
4 Mbps
8 Mbps
2 Mbps
4 Mbps
8 Mbps
Frame Boundary
CT_D time-slots @ 8 Mbps 123
CT_D time-slots @ 4 Mbps 123
CT_D time-slots @ 2 Mbps 30
124
125
126
127
0
1
2
3
4
2
1
62
63
0
1
31
0
Figure 5. CT Bus Data Stream Switching
The Stream Switch provides a data stream-to-data stream connection capability. Switching between any
of the 32 CT Bus data streams operating at 2, 4, or 8 Mbps is supported. Eight stream switch channels are
provided. Individual time-slots are not tri-state controlled. Buffering is done on single time-slots rather
than entire frames. This trade-off complicates the connection matrix, but without this compromise it
would not be practical to implement the Stream Switch.
Depending upon the data stream rates, the stream switch provides a minimum of 256 and a maximum of
1024 uni-directional time-slot connections. Stream switches in other ML53612 devices in a system may be
used simultaneously to increase switching capability. The output of the stream switch is multiplexed
with the output of the transmit switch, with the transmit switch having priority.
40
Oki Semiconductor
OKI [ OKI ELECTRONIC COMPONETS ]
