MT90812 Mitel Networks Corporation, MT90812 Datasheet - Page 55

• Manufacturer Part Number: MT90812
• Description: Integrated Digital Switch (IDX)
• Manufacturer: Mitel Networks Corporation

Advance Information
At locations 60 to 6E, Connect Memory High is used to specify the Conference incoming channel attenuation
and Noise Suppression. For these locations bits 7-3 are used as incoming channel attenuation, bits 1-0 are
used for Noise Suppression bits and bit 2 is not used.
21.2
The CML is defined as follows:
Connection Memory Low is used to specify the source for the outgoing channels and connect the Conference,
Energy Detect and DBRT blocks to incoming channels. Table 19 lists the Data Memory Block and Channel
Address Bits used in Data Memory Addresses.
At locations 60 to 6E, Connect Memory Low is used to identify channels in a conference. At location 6F,
Connect Memory Low is used to identify which channel is to be routed to the D-Channel RX FIFO. Locations 70
and 71h are used to identify the channel routed to the Energy Detect A and B blocks, respectively.
7-5
4-0
Bit
Hex Address
A7-A5
000
001
010
011
011
011
011
100
101
110
111
Connection Memory Low
Channel Address
Block Address
Data Memory
Name
Bits
Bits
Hex Address
A4-A0
00-0E
00-1F
00-1F
00-1F
11-1F
00-1F
00-1F
00-1F
00-1F
0F
10
The number expressed in binary notation on these 3 bits is the number of the Data
Memory block for the source of the connection. Bit 7 is the most significant bit.
The number expressed in binary notation on these 5 bits is the number of the
channel which is the source of the connection. Bit 4 is the most significant bit. e.g., if
bit 4 is 1, bit 3 is 0, bit 2 is 0, bit 1 is 1 and bit 0 is 1, then the source of the connection
is channel 19.
A7
7
Table 19 - Data Memory Addressing
Local/Expansion
STi1 32 Channels
Sti0 32 Channels
Ei1 32 Channels
Ei2 32 Channels
Ei3 32 Channels
Ei4 32 Channels
Data Memory
CONFout(15),
unused(14)
DCHout(1)
Tones(32)
A6
6
unused
A5
5
A4
4
Sti0 32 Channels
STi1 32 Channels
Tone Generator output
Conference Output
unused(1)
Output from the D-channel TX FIFO buffer. Allows
D-channel TX buffer to be directed to any outgoing
channel.
unused(14)
Expansion Bus Block 1
Expansion Bus Block 2
Expansion Bus Block 3
Expansion Bus Block 4
A3
3
Description
A2
2
A1
1
Description
A0
0
MT90812
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