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Details, datasheet, quote on part number:AL100A
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| Part: | AL100A |
| Category: | Communication => Network => Ethernet/DS1/E1 (T1/E1) => Fast Ethernet |
| Description: | 8 Port Low Cost 10/100 Switch |
| Company: | Allayer Communications |
| Datasheet: | Download AL100A datasheet File size : 28 kB |
| Request For quote: | Find where to buy AL100A
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Datasheet text preview:
A L100A Advance Information 8 PORT LOW COST 10/100 SWITCH
· Supports eight 10/100 Mbit/s Ethernet ports with MII interface · Capable of trunking up to 800 Mbit/s link with link fail over · Full- and half-duplex mode operation · Supports 1K MAC addresses · Designed to utilize low-cost SGRAM · Scalable design for stackable switch implementation · RoX expansion link supports 6.4 Gbit/s throughput · Gigabit Ethernet ready · Speed auto-negotiation through MDIO · Automatic source address learning · · · · · · · · · · Secure mode traffic filtering Broadcast storm control Port monitoring support IEEE 802.3x flow control for full duplex operation RMON and SNMP support with external management (MIB) device Optional backpressure flow control support for half-duplex operation Supports store-and-forward mode switching VLAN support 0.35 micron, 3.3V CMOS technology Packaged in 388-pin BGA
Product Description
The AL100A is an eight-port 10/100 Mbit/s dual-speed Ethernet switch. A low-cost and scalable solution is achieved through the use of low-cost buffer memory and Allayer's proprietary RoX architecture. The AL100A also supports VLAN and multiple port aggregation trunks.
10/100 MAC Switch Controller Buffer Manager
10/100 MAC Expansion Interface 10/100 MAC High Speed Switch Fabric Address Control
10/100 MAC
10/100 MAC
Address Table
10/100 MAC EEPROM Interface Management Information 10/100 MAC
10/100 MAC
Figure 1
System Block Diagram
Reference Only / Allayer Confidential
AL100A Advance Information
AL100A Overview
The RoX interface is a 2.4 Gbit/s interface (4.8 Gbit/s full-duplex). The interface can support up to four switch chips. Various combinations can be used for different configurations. The maximum port configuration will be either 32-port 100 Mbps ports or 24-port 100 Mbps plus two Gigabit Ethernet ports. The AL100A provides eight 10/100 Mbps Ethernet ports that supports both 10 and 100 Mbps data rates. The operation mode is auto-negotiated by the PHY. All ports are full duplex capable. The RoX interface also supports an external management device. The external management device supports SNMP and RMON. The AL100A supports port-based VLAN. The VLAN register set is used to configure the destination ports for multicast and broadcast frames. The device also supports VLAN for workgroup and segment switching applications. The AL100A supports trunking applications. The chip provides two optional load balancing schemes, explicit and dynamic. With trunking, it is possible to group up to four full-duplex links together to form a single 800 Mbps link. The AL100A utilizes cost effective SGRAM to provide 8-Mbps or 16-Mbps of buffer memory. During transmission, the data is obtained from the buffer memory and routed to the destination port. In the event of a collision during half-duplex operation, the MAC control will back off and retransmit in accordance to the IEEE 802.3 specifications. Data received from the MAC interface is stored in the external memory buffer. The AL100A provides two flow control methods. For half-duplex operations, an optional jamming based flow control (also known as backpressure) is available to prevent loss of data. With this method of flow control, the switch will generate a jam signal when the receive-buffer is full. The sending station will not transmit until the line is clear. In the full-duplex mode, AL100A utilizes IEEE 802.3x as the flow control mechanism. All ports support multiple MAC addresses. The switch chip supports up to 1K MAC addresses internally. These MAC addresses are shared among all eight ports. Additional SRAM can be added to provide 16K MAC addresses support. The initialization and configuration of the switch is programmed by an external EEPROM. For an unmanaged switch design, there is no need for a CPU. Field reconfigurations can be achieved by using a parallel interface to reprogram the EEPROM. For managed switch applications, the AL100A supports network management through the network management option. When the management option is enabled, network statistics for each port are gathered and sent across the RoX bus. The management information base chip on the bus will collect and store the data for the network management agent. Access to the statistic counters is provided via the CPU interface of the MIB device. The AL100A operates only in the store and forward mode. The entire frame is checked for errors. Frames with errors are automatically filtered and are not forwarded to the destination port. The device also provides two levels of security for intrusion protection. Security can be implemented on a per port basis. Other features include port monitoring and broadcast storm throttling.
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Reference Only / Allayer Confidential
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