MT90869AG Zarlink, MT90869AG Datasheet - Page 39

• 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

4.2.3
The Backplane Output Enable Bit (BE) of the Backplane Connection Memory has direct per-channel control on the
high-impedance state of the Backplane Output streams, BSTo0-31 (for Non-32 Mb/s Mode) and BSTo0-15 (for
32 Mb/s Mode). Programming a LOW state will set the stream output of the MT90869 to High Impedance for the
duration of the channel period. See Section 12.4, Backplane Connection Memory Bit Definition, for
programming details.
The BCSTo0-3 outputs remain active.
(32 Mb/s)
(32 Mb/s)
(32 Mb/s)
(32 Mb/s)
BORS Set HIGH
BCSTo0
BCSTo1
BCSTo2
BCSTo3
BSTo0
BSTo3
BSTo2
BSTo1
FP8o
C8o
Figure 15 - Backplane Port External High Impedance Control Timing (32 Mb/s Mode)
Channel 0
bits 7-0
Channel 0
bits 7-0
Channel 0
bits 7-0
Channel 0
bits 7-0
Zarlink Semiconductor Inc.
Channel 1
bits 7-0
Channel 1
bits 7-0
Channel 1
bits 7-0
Channel 1
bits 7-0
MT90869
39
Channel 510
bits 7-0
Channel 510
bits 7-0
Channel 510
bits 7-0
Channel 510
bits 7-0
One C16o cycle
Channel 511
bits 7-0
Channel 511
bits 7-0
Channel 511
bits 7-0
Channel 511
bits 7-0
Data Sheet