MT90869AG Zarlink, MT90869AG Datasheet - Page 58

• 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

13.6
Address 0043h to 0062h
Thirty-two backplane input channel delay registers (BCDR0 to BCDR31) allow users to program the input channel
delay for the backplane input data streams BSTi0-31. The possible adjustment is 511 channels and the BCDR0 to
BCDR31 registers are configured as follows:
13.6.1
These nine bits define the delay, in channel numbers, the serial interface receiver takes to store the channel data
from the Backplane input pins. The input channel delay can be selected to 511 (32 Mb/s streams), 255 (16 Mb/s
streams), 127 (8 Mb/s streams), 63 (4 Mb/s streams) or 31 (2 Mb/s streams) from the frame boundary.
(where n = 0 to 31 for non-32Mb/s
mode, n = 0 to 15 for 32Mb/s
Backplane Input Channel Delay Registers (BCDR0 to BCDR31)
BCDRn Bit
Backplane Channel Delay Bits 8-0 (BCDn8 - BCDn0)
mode)
15-9
8-0
Table 24 - Backplane Input Channel Delay (BCD) Programming Table
0 Channel (Default)
Table 23 - Backplane Channel Delay Register (BCDRn) Bits
Channel Delay
509 Channels
510 Channels
Input Stream
511 Channels
2 Channels
3 Channels
4 Channels
5 Channels
1 Channel
...
...
Reserved
BCD(8:0)
Name
Zarlink Semiconductor Inc.
MT90869
Reset
0
0
58
Reserved
Backplane Channel Delay Register
The binary value of these bits refers to the channel
delay value for the backplane input stream
Corresponding Delay Bits
BCD8-BCD0
0 0000 0000
0 0000 0001
0 0000 0010
0 0000 0100
0 0000 0101
0 0000 0011
1 1111 1101
1 1111 1110
1 1111 1111
...
...
Description
Data Sheet