MT90868 Zarlink Semiconductor, Inc., MT90868 Datasheet - Page 46

• Manufacturer Part Number: MT90868
• Description: High Bandwidth Digital Switch - 8,192 x 8,192 channels among local streams and 1,024 x 1,024 channels among two selected backplane streams
• Manufacturer: Zarlink Semiconductor, Inc.

MT90868
46
*Note: Only Bit 7-0 will be used for per-channel message mode.
*Note: The last channel (Ch255 or Ch511) of the backplane output streams BSTo60 to BSTo63 or BSTo58 to BSTo63
contains invalid output data when operated in the 16Mb/s or 32Mb/s mode respectively. Avoid using the last channel of
these streams for the "local-to-backplane" switching.
*Note: Only Bit 7-0 will be used for per-channel message mode.
14 - 13
14 - 13
12 - 7*
6 - 0 *
8 - 0 *
12-10
BSRC
BSRC
Table 33 - Backplane Connection Memory (BCM) Bits for "Backplane-to-Backplane" Switching
Bit
Bit
= 0
= 1
15
15
15
15
9
Table 32 - Backplane Connection Memory (BCM) Bits for "Local-to-Backplane" Switching
BTM
BTM
14
14
1
1
BCAB6 - 0
BCAB8 - 0
BSAB5 - 0
BTM1 - 0
BTM1 - 0
Unused
BSAB0
BSRC
BSRC
Name
Name
BTM
BTM
13
13
0
0
BSA
12
B5
12
0
Backplane Source Control Bit: When this bit is low, the "local-to-backplane"
switching is enabled and the source is from the local input port.
Backplane TM Bits: These two bits control the backplane outputs
Backplane Source Stream Address Bits: The binary value of these 6 bits repre-
sents the local data input stream number.
Source Channel Address Bits: The binary value of these 7 bits represents the
local input channel number.
Backplane Source Control Bit: When this bit is high, the "backplane-to backplane"
switching is enabled and the source is from the backplane input port.
Backplane TM Bits: These two bits control the backplane outputs
Reserved. Set to zero for normal operation.
Backplane Source Stream Address Bits: When this bit is low, the source stream
(Stream A) is selected. Stream A is defined in the BDISR register.
When this bit is high, the source stream (Stream B) is selected. Stream B is defined
in the BDISR register.
Source Channel Address Bits: The binary value of these 9 bits represents the
local input channel number.
BSA
B4
11
11
0
BSA
10
B3
10
0
BTM1
BTM1
0
0
1
1
0
0
1
1
BSA
BSA
B2
B0
9
9
BSA
BCA
B1
B8
8
8
BTM0
BTM0
0
1
0
1
0
1
0
1
BSA
BCA
B0
B7
7
7
Description
Description
BCA
BCA
B6
B6
Per-Channel Operation Mode
Per-Channel Operation Mode
6
6
(See Bit 15 (BHIZ) in Table 5)
(See Bit 15 (BHIZ) in Table 5)
Tristate/Driven-High
Tristate/Driven-High
BCA
BCA
BER Test Mode
BER Test Mode
B5
Normal Output
B5
Normal Output
5
5
Msg Mode
Msg Mode
BCA
BCA
B4
B4
4
4
Advance Information
BCA
BCA
B3
B3
3
3
BCA
BCA
B2
B2
2
2
.
.
BCA
BCA
B1
B1
1
1
BCA
BCA
B0
B0
0
0