MT90869AG Zarlink, MT90869AG Datasheet - Page 49

• Manufacturer Part Number: MT90869AG
• Description: Switch Fabric 16K x 16K/8K x 8K 1.8V/3.3V 272-Pin BGA Tray
• Manufacturer: Zarlink

Specifications of MT90869AG

• Package: 272BGA
• Number Of Ports: 64
• Fabric Size: 16K x 16K|8K x 8K
• Switch Core: Non-Blocking|Blocking
• Port Speed: 8.192|4.096|2.048 Mbps
• Operating Supply Voltage: 1.8|3.3 V

12-8
12-9
7-0
Bit
15
14
13
8-0
Bit
15
14
13
Table 13 - BCM Bits for Local-to-Backplane and Backplane-to-Backplane Switching (Non-32 Mb/s
BSAB4-0
BCAB7-0
BCAB8-0
BSAB3-0
Name
BSRC
BMM
BSRC
Name
BMM
BE
BE
Table 14 - BCM Bits for Backplane-to-Backplane Switching (32Mb/s mode)
Backplane Source Control Bit.
When LOW, the source is from the local input port (Local Data Memory). When HIGH, the
source is from the backplane input port (Backplane Data Memory). BSRC is ignored when
BMM is set HIGH in Message Mode.
Backplane Message Mode Bit.
When LOW, the channel is in Connection Mode. When HIGH, the channel is in Message
Mode.
Backplane Output Enable Bit.
When LOW the channel may be high impedance, either at the device output or set by an
external buffer, dependent upon the BORS pin. When HIGH the channel is active.
Backplane Source Stream Address Bits.
The binary value of these 5 bits represents the input stream number. BSAB4-0 are ignored
when BMM is set HIGH in Message Mode.
Source Channel Address Bits.
The binary value of these 8 bits represents the input channel number when BMM is set
LOW. BCAB7-0 are transmitted as data when BMM is set HIGH in Message Mode.
Backplane Source Control Bit.
When LOW, the source is from the local input port (Local Data Memory).
When HIGH, the source is from the backplane input port (Backplane Data Memory).
BSRC is ignored when BMM is set HIGH in Message Mode.
Backplane Message Mode Bit.
When LOW, the channel is in Connection Mode.
When HIGH, the channel is in Message Mode.
Backplane Output Enable Bit.
When this bit is low the channel may be high impedance, either at the device output or set
by an external buffer, dependent upon the BORS pin. When the bit is high the channel is
active.
Backplane Source Stream Address Bits.
The binary value of these 4 bits represents the input stream number.
BSAB3-0 are ignored when BMM is set HIGH in Message Mode.
Source Channel Address Bits.
The binary value of these 9 bits represents the input channel number when BMM is LOW.
BCAB7-0 are transmitted as data when BMM is set HIGH in Message Mode.
Zarlink Semiconductor Inc.
MT90869
Mode)
49
Description
Description
Data Sheet