FBFM2112F897CSLJLS 查看數據表（PDF） - Intel

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FBFM2112F897CSLJLS

Intel® FM2112 24-Port 10G/1G Ethernet Switch Chip

Intel 

Intel® FM2112 24-Port 10G/1G Ethernet Switch Chip Data Sheet

1.1.4

1.2

of 3.125 GHz and 4 GHz, each interface can be independently configured to support

data rates of 10 Mbps, 100Mbps, 1 Gbps, or 2.5 Gbps.

When all interfaces are set to the same operating mode, the FM2112

performs as a cut-through switch. When interfaces are configured for

different modes, the FM2112 performs a store-and-forward function on

the link pairs that don't have matching clock rates to avoid buffer over-

runs and other congestion due to interface rate mismatch.

Control and Test Interfaces

The FM2112 also contains a standard 32-bit address/data processor

bus interface that is used to read and write all Control Status Registers

that control the chip configuration and operation, and also to obtain

status and to debug the chip. This CPU interface can be configured to

support a variety of commercial processors including the Freescale

family of PowerPC processors that contain the EBC bus (such as the

8347 and 8541), and various I/O bridge chips (such as the PLX 9030

PCI bridge chip from PLX Technologies). The different modes are

supported through pin strapping options. This CPU interface operates

up to 100 MHz.

Additionally, the FM2112 contains an LED interface that can be

connected to external LED driver chips to provide port- and system-

level status and activity via front-panel LEDs.

Lastly, the FM2112 implements an industry-standard JTAG controller

for test and design debug. The JTAG controller can access boundary

scan registers and all internal registers.

Application Examples

With unprecedented integration, performance, power efficiency, and

latency characteristics, the FM2112 can be used for a variety of

infrastructure and interconnect applications, some of which include:

• Blade computer and IP storage platform internal fabric

• Data center cluster interconnect (clustered computers and storage resources)

• Enterprise stackable switch (performance workgroups and workgroup aggregation)

• Advanced TCA backplane fabric (star or mesh architecture)

• Advanced TCA carrier card switch (interconnecting mezzanine cards)

• Advanced TCA base fabric

• Proprietary system backplane fabric

The FM2112 is a versatile device that can be used in a variety of

applications where efficient Ethernet packet switching is the method of

choice for interconnecting the elements in a system. The following

subsections detail some of the common applications that the FM2112 is

capable of supporting, and identifies some of the device's capabilities

that are relevant for each application.

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