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Reference Only / Allayer Communications
AL103
Revision 1.0
8 PORT LOW COST 10/100 SWITCH
Product Description
The AL103 is an eight-port 10/100 Mbit/s dual speed Ethernet switch. A low-cost Fast Ethernet
switch can be implemented using the AL103 with low-cost SGRAM. The AL103 also supports
VLAN and multiple port aggregation trunks.
Figure 1
System Block Diagram
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Supports 8 10/100 Mbit/s MII ports
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Capable of trunking up to 800 Mbit/s link
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Trunk fail-over feature
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Full- and half-duplex mode operation
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Speed auto-negotiation through MDIO
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Built-in storage of 1K MAC addresses
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Design to utilize low-cost SGRAM
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Serial EEPROM interface for low-cost
system configuration
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Automatic source address learning
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Secure mode traffic filtering
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Broadcast storm control
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Port monitoring support
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IEEE 802.3x flow control for full-duplex
operation
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Optional backpressure flow control sup-
port for half-duplex operation
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Supports store-and-forward mode
switching
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VLAN support
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AL102A pin compatible
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3.3V operation
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Packaged in 256-pin PQFP
10/100 MAC
10/100 MAC
10/100 MAC
10/100 MAC
10/100 MAC
10/100 MAC
10/100 MAC
10/100 MAC
High Speed
Switch Fabric
Switch
Controller
Address
Control
Address
Table
Buffer
Manager
EEPROM
Interface
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