MT8986 Mitel Semiconductor, MT8986 Datasheet - Page 18

• Manufacturer Part Number: MT8986
• Description: CMOS ST-BUS FAMILY Multiple Rate Digital Switch
• Manufacturer: Mitel Semiconductor

MT8986
* - only in 44 pin package
2-80
If bit two (MC) of the corresponding Connection High locations is 1, or if bit 6 of the Control Register is 1, then these entire eight bits are output
on the corresponding output channel and stream associated with this location. Otherwise, the bits are used as indicated to define the source
of the connection which is output on the channel and stream associated with this location.
2 Mb/s to 4 Mb/s
2 Mb/s to 8 Mb/s
4 Mb/s to 2 Mb/s
8 Mb/s to 2 Mb/s
Nibble Switch
BIT
7-5
4-0
Identical
2 Mb/s *
2 Mb/s *
(2 Mb/s)
Different
2 Mb/s
4 Mb/s
4 Mb/s
8 Mb/s
Rate
I/O
Rate
I/O
CAB4-0*
SAB2-0*
Table 10. CAB and SAB Bits Programming for Different I/O Rate Applications
Table 9. CAB and SAB Bits Programming for Identical I/O Rate Applications
NAME
# of Input x
Output Streams
Streams
Output
Source Stream Address bits. These three bits are used together with SAB3 in CMH to
select up to 16 different source streams for the connection. Depending on the switching
configuration and the data rate selected in the application, 1, 2, 3 or all 4 SAB bits can be
used. See Tables 9 and 10 for details.
Source Channel Address bits 0-4. These five bits are used together with CAB5-6 in
CMH to select up 128 different source channels for the connection. Depending on the
switching configuration and the data rate used in the application, 5, 6 or all 7 CAB bits
can be used to select respectively 32, 64 or 128 different channels.
See Tables 9 and 10 for details.
# of Input x
16x8 *
4x4 *
8x8
4x4
8x4
2x2
8x4
8x4
8x2
4x8
2x8
SAB2
Figure 6 - Connection Memory Low (CML) Bits
7
Connection Memory Low - Read/Write
SAB1
6
CAB4 to CAB0 (32 channel/inp. stream)
CAB4 to CAB0 (32 channel/inp. stream)
CAB4 to CAB0 (32 channel/inp. stream)
CAB5 to CAB0 (64 channel/inp. stream)
CAB5 to CAB0 (64 channel/inp. stream)
CAB6 to CAB0 (128 channel/inp. stream)
CAB5 to CAB0 (64 nibble/inp. stream)
CAB bits used to determine the source
CAB4 to CAB0 (32 channel/inp. stream)
CAB4 to CAB0 (32 channel/inp. stream)
CAB5 to CAB0 (64 channel/inp. stream)
CAB6 to CAB0 (128 channel/inp. stream)
CAB bits used to determine the source
SAB0
5
channel for the connection
channel for the connection
CAB4
(CM low bits)
4
CAB3
3
DESCRIPTION
CAB2
2
CAB1
1
CAB0
0
SAB2, SAB1, SAB0
SAB2, SAB1
SAB3, SAB2, SAB1, SAB0
SAB2, SAB1
SAB2, SAB1, SAB0
SAB2
SAB2, SAB1, SAB0
determine the source
SAB2, SAB1, SAB0
SAB2, SAB1, SAB0
SAB2, SAB1
SAB2
determine the source
SAB bits used to
stream for the
SAB bits used to
connection
stream for the
connection