MT90863 Mitel Networks Corporation, MT90863 Datasheet - Page 13

• Manufacturer Part Number: MT90863
• Description: 3V Rate Conversion Digital Switch
• Manufacturer: Mitel Networks Corporation

Advance Information
15-11
15 - 5
7 - 5
4 - 0
4 - 3
2 - 0
Bit
Bit
10
9
8
15
15
0
0
Read/Write Address:
Read/Write Address:
14
14
0
0
BMS2-0
Unused
STA4-0
unused
Name
MS2-0
Name
MBP
LMS
AB
CT
13
13
0
0
12
12
0
0
Must be zero for normal operation.
Address Buffer. When 1, enables the address buffer, data write and data read registers for
accessing various memory locations for fast microport access. When 0, disables the address
buffer, data write & data read registers.
Channel Tri-state. When 1, the last bit of each output channel is tri-stated for -22ns against
the channel boundary. When 0, the last bit of each channel is not tri-stated.
Memory Block Program. When 1, the connection memory block programming feature is ready
for the programming of bit 11 to 13 for backplane connection memory, bit 12 to 15 for local
connection memory low. When 0, this feature is disabled.
Memory Select Bits. These three bits are used to select connection and data memory
functions as follows:
MS2-0 Memory Selection
Stream Address Bits. The binary value expressed by these bits refers to the input or output
data stream, which corresponds to the subsection of memory made accessible for subsequent
operations. (STA4 = MSB, STA0 = LSB)
Reserved
Local Mode Selection Bit. The binary value expressed by these bits refers to the following
backplane interface switching modes:
Backplane Mode Selection Bits. The binary value expressed by these bits refers to the follow-
ing backplane interface switching modes:
Table 7 - Device Mode Selection (DMS) Register Bits
000
001
010
011
100
LMS1-0
BMS2-0
00
01
10
000
001
010
011
100
101
110
11
11
0
0
00
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,
01
Table 6 - Control (CR) Register Bits
H
H
10
,
10
2Mb/s ST-BUS Mode
2Mb/s Sub-rate Switching Mode
8Mb/s ST-Bus Mode
,
Local Switching Mode
AB
0
Backplane Switching Mode
2Mb/s ST-BUS Mode
2Mb/s CT Bus Mode
4Mb/s ST-BUS Mode
4Mb/s CT Bus Mode
8Mb/s ST-BUS Mode
8Mb/s CT Bus Mode
HMVIP Mode
Reset Value:
Reset Value:
CT
9
9
0
MBP
8
8
0
MS2
7
7
0
0000
0000
MS1
Description
Description
H
6
H
6
0
.
.
MS0
5
5
0
STA4
LMS1
4
4
STA3
LMS0
3
3
STA2
BMS2
2
2
STA1
BMS1
1
MT90863
1
STA0
BMS0
0
0
13