MT90870AG Zarlink, MT90870AG Datasheet - Page 68

• Manufacturer Part Number: MT90870AG
• Description: Switch Fabric 12K x 12K/8K x 4K 1.8V/3.3V 272-Pin BGA Tray
• Manufacturer: Zarlink

Specifications of MT90870AG

• Package: 272BGA
• Number Of Ports: 32
• Fabric Size: 12K x 12K|8K x 4K
• Switch Core: Non-Blocking|Blocking
• Port Speed: 2.048|4.096|8.192|16.384 Mbps
• Operating Supply Voltage: 1.8|3.3 V

13.13
13.13.1
Address 010Dh to 012Ch
Thirty-two Backplane Input Bit Rate Registers allow the bit rate for each individual stream to be set to 2, 4, 8 or 16
Mb/s. These registers may be overridden by setting 32 Mb/s mode in the control register, in which case, Backplane
streams 0-15 will operate at 32 Mb/s and Backplane streams 16-31 will be unused. The BIBRR registers are
configured as follows:
13.13.2
Address 012Dh to 014Ch
Thirty-two Backplane Output Bit Rate Registers allow the bit rate for each individual stream to be set to 2, 4, 8 or 16
Mb/s.These registers may be overridden by setting 32 Mb/s mode in the control register, in which case, Backplane
streams 0-15 will operate at 32 Mb/s and Backplane streams 16-31 will be unused. The BOBRR registers are
configured as follows:
(
BIBRn Bit
for n=0 to 31)
BOBRn Bit
(for n=0 to 31)
15-2
1-0
15-2
1-0
Backplane Bit Rate Registers
Backplane Input Bit Rate Registers (BIBRR0-31)
Backplane Output Bit Rate Registers (BOBRR0-31)
BIBR(1:0)
Reserved
BOBR(1:0)
Reserved
Name
Name
Table 46 - Backplane Input Bit Rate (BIBR) Programming Table
Table 47 - Backplane Output Bit Rate Register (BOBRRn) Bits
Table 45 - Backplane Input Bit Rate Register (BIBRRn) Bits
BIBR1
0
0
1
1
Reset
Reset
0
0
0
0
BIBR0
0
1
0
1
Zarlink Semiconductor Inc.
Reserved
Backplane Input Bit Rate
Reserved
Backplane Output Bit Rate
MT90870
68
Bit rate for stream n
16 Mb/s
2 Mb/s
4 Mb/s
8 Mb/s
Description
Description
Data Sheet