MT90870AG Zarlink, MT90870AG Datasheet - Page 53

• 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

2-0
Bit
MS(2:0)
Name
(b)
(a)
Reset
Frame Pulse Width = 122 ns,
Control Register Bit8 (FPW) = 0
Control Register Bit6 (C8IPOL) = 1
Frame Pulse Width = 244 ns,
Control Register Bit8 (FPW) = 1
Control Register Bit6 (C8IPOL) = 1
FP8i
C8i
FP8i
C8i
0
Figure 18 - Frame Boundary Conditions, ST- BUS Operation
Memory Select Bits.
These three bits select the connection or data memory for subsequent micro-port
memory access operations:
000, Local Connection Memory (LCM) is selected for Read or Write operations.
001, Backplane Connection Memory (BCM) is selected for Read or Write
operations. 010, Local Data Memory is selected for Read-only operation. 011,
Backplane Data Memory is selected for Read-only operation.
Table 16 - Control Register Bits (continued)
Zarlink Semiconductor Inc.
MT90870
Frame Boundary
53
Description
Data Sheet