Advance Information
MT90863
Read Address:
Reset value:
0E for DRR register,
H
0000
H
15
14
13
12
11
10
RD10
9
8
7
6
5
4
3
2
1
0
RD15
RD14 RD13
RD12 RD11
RD9
RD8
RD7
RD6
RD5
RD4
RD3
RD2
RD1
RD0
Bit
15 - 0
Name
RD15 - RD0
Description
Read Data Bits. Data transferred from one of the internal memory locations.
Table 15 -. Data Read (DRR) Register Bits
15
14
0
13
12
11
10
9
8
7
6
5
4
3
2
1
0
BCAB
6
BSAB BSAB BSAB BSAB
3
BCAB BCAB BCAB BCAB BCAB BCAB
5
0
BV/C BMC
DC
2
1
0
4
3
2
1
0
Bit
Name
Description
Must be zero for normal operation.
15,14
13
Unused
BV/C
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
local interface streams.
12
11
BMC
DC
Message Channel. When 1, the backplane connection memory contents are
output on the corresponding output channel and stream. Only the lower byte
(bit 7 - bit 0) will be output to the backplane interface STio pins. When 0, the
local data memory address of the switched STi input channel and stream is
loaded into the backplane connection memory.
Directional Control. This bit enables the STio pindrivers on a per-channel
basis. When 1, the STio output driver functions normally. When 0, the STio
output driver is in a high-impedance state.
10-7
(Note 1)
BSAB3-0
BCAB6-0
Source Stream Address Bits. The binary value is the number of the data
stream for the source of the connection.
6-0
Source Channel Address Bits. The binary value identifies the channel for
(Note 1)
the connection source.
Note 1: If bit 12 (BMC) of the corresponding backplane connection memory location is 1 (device in message mode), then these
entire 8 bits (BSAB0, BCAB6 - BCAB0) are output on the output channel and stream associated with this location.
Table 16 - Blackplane Connection Memory Bits
BSAB3 to BSAB0 Bits Used to Determine
Data Rate
the Source Stream of the connection
2.048 Mb/s
8.192 Mb/s
STi0 to STi15
STi0 to STi3
STi0 to STi12
2.048 Mb/s
Sub-rate Switching
Table 17 - BSAB Bits Programming for Different Local Interface mode
21
MITEL [ MITEL NETWORKS CORPORATION ]
