MT90866 View Datasheet(PDF) - Zarlink Semiconductor Inc
Part Name
Description
Manufacturer
MT90866
Zarlink Semiconductor Inc
MT90866 Datasheet PDF : 86 Pages
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MT90866
Data Sheet
Bit
Name
Description
2-0
MS2-0 Memory Select Bits: These three bits are used to select different connection and data
memories.
MS2
0
0
0
0
1
MS11
0
0
1
1
0
MS0
0
1
0
1
0
Memory Selection
Local Connection Memory Low
Read/Write
Local Connection Memory High
Read/Write
Backplane Connection Memory
Read/Write
Local Data Memory Read
Backplane Data Memory Read
Table 9 - Control Register (CR) Bits (continued)
Read/Write Address: 0001H
Reset Value: 0000H
15
14
13
12
0 BMS LG41 LG40
11
LG32
10
LG31
9
LG30
8
LG22
7
LG21
6
LG20
5
LG12
4
LG11
3
LG10
2
LG02
1
LG01
0
LG00
Bit
Name
Description
15
Unused Reserved.
14
BMS
Backplane Mode Select: This bit refers to the different mode for the backplane interface.
BMS Switching Mode Usable Streams
0
8 Mb/s
STio0 - 31
1
16 Mb/s
STio0 - 15
13-12 LG41-LG40 Local Group 4 Mode Select: These two bits refer to different switching mode for group
4(STi16-27 and STo16-27) of the local interface. When operating at 4Mb/s or 8Mb/s, the
STo19-27 are driven low.
LG41
0
0
1
LG40 Switching Mode
0
8 Mb/s
1
4 Mb/s
0
2 Mb/s
Usable Streams
STi16-18, STo16-18
STi16-18, STo16-18
STi16-27, STo16-27
11-9
LG32-LG30 Local Group 3 Mode Select: These three bits refer to different switching mode for
group 3 (STi12-15 and STo12-15) of the local interface.
LG32
0
0
0
0
1
LG31
0
0
1
1
0
LG30
0
1
0
1
0
Switching Mode
8 Mb/s
4 Mb/s
2 Mb/s
4-bit wide subrate
2-bit wide subrate
Usable Streams
STi12-15, STo12-15
STi12-15, STo12-15
STi12-15, STo12-15
STi12-15, STo12-15
STi12-15, STo12-15
Table 10 - Device Mode Selection (DMS) Register Bits
47
Zarlink Semiconductor Inc.
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