MT90863 Mitel Networks Corporation, MT90863 Datasheet - Page 22

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

MT90863
22
Note 1: If bit 12 (LMC) of the corresponding local connection memory location is 1 (device in message mode), then these entire 8
bits (LSAB0, LCAB6 - LCAB0) are output on the output channel and stream associated with this location.
(Note 1)
(Note 1)
11-7
6-0
Bit
15
14
13
12
15
L/B
Sub-rate Switching
2.048 Mb/s
8.192 Mb/s
2.048 Mb/s
Data Rate
BV/C
14
LCAB6-0
LSAB4-0
BMC
Name
13
LV/C
LMC
L/B
OE
Table 18 -. BCAB Bits Programming for Different Data Rates
OE
12
Table 19 -. Local Connection Memory Low Bits
LSAB
11
4
Local/Backplane Select
When 1, the output channel of STo0-15 comes from STi0-15 (local)
When 0, the output channel of STo0-15 comes from:
Variable /Constant Throughput Delay. This bit is used to select either
variable (low) or constant delay (high) modes on a per-channel basis for the
source streams.
Message Channel. When 1, the contents of the local connection memory are
output on the corresponding output channel and stream. Only the lower byte
(bit 7 - bit 0) will be output to the STo pins of the local interface. When 0, the
backplane or local data memory address of the switched input channel and
stream is loaded into the local connection memory.
Output Enable. This bit enables the drivers of STo pins on a per-channel
basis. When 1, the STo output driver functions normally. When 0, the STo
output driver is in a high-impedance state.
Source Stream Address Bits. The binary value identifies the data stream for
the source of the connection.
Source Channel Address Bits. The binary value identifies the channel for the
source of the connection.
BCAB Bits Used to Determine the Source Channel of the Connection
LSAB
10
3
LSAB
9
2
LSAB
8
1
BCAB6 to BCAB0 (128 channel/frame)
BCAB6 to BCAB0 (128 channel/frame)
BCAB4 to BCAB0 (32 channel/frame)
BCAB4 to BCAB0 (32 channel/frame)
LSAB
7
0
LCAB
6
6
Description
STio0-31 (backplane, 2Mb/s mode)
STio0-31 (backplane, 4Mb/s mode)
STio0-15 (blackplane, 8Mb/s mode)
STio0-23 (blackplane, HMVIP mode)
LCAB
5
5
LCAB
4
4
LCAB
Advance Information
3
3
LCAB
2
2
LCAB
1
1
LCAB
0
0