8-Port Gigabit Ethernet Switch Description AT79C1030 device

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8-Port Gigabit Ethernet Switch Description AT79C1030 device

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8-port 10/100/1000Mb/s Ethernet MII/GMII Switch Provides Packet Switching Functions Between Ethernet Ports Advanced (Class Service) Supports 4-level Priority Switching Duplex Mode Auto-negotiation Supported Full-duplex Flow Control (802.3x) Half-duplex Back Pressure VLAN 802.1Q Port-based Supported (Port-based, MAC-based Protocol Based) ARP/Broadcast Filter (Optional) Ports with Non-blocking Switching Performance Supports Automatic Address Learning Aging Integrated VLAN Address Tables On-chip Packet Buffer Supports Store-and-Forward Switching Architecture (RS-232 Interface) Setup Unmanaged Operation Multicast Broadcast Storm Control 36-Kbyte Media Access Control (MAC) Address Cache 1.8V 3.3V Supply
8-Port Gigabit Ethernet Switch
Description
AT79C1030 device combines functions high-speed switch, including packet buffer, Media Access Controllers (MAC), address management, nonblocking switch fabric. complies with IEEE specification, providing compatibility with industry standard Ethernet, Fast Ethernet, Gigabit Ethernet devices. AT79C1030 utilizes Store Forward switching architecture manage packet switching between eight independent Ethernet ports. switch records (learning), relation between addresses (including VLAN information) actual ports. Next, switch will resolve (forwarding) destination address ingress packet, then selects related ports transmit packet. device utilizing maintaining address table VLAN table accomplish this task. Using Store Forward, device reads whole incoming frame into internal on-chip buffer calculates frame check sequence. switch then compares figure frame's CRC. CRCs same, switch will consult address look-up table, create virtual link then forward frame. Switch Core uses packet head information perform packet filter, packet drop, address table look priority category, etc. After device completes task forwarding decision, then forwarding information will sent forwarding module. Each port independent forwarding module. module puts forwarding information packets forwarded each respected port. This information includes: packet buffer location size packet VLAN information Four level priority queues employed each port. transmission module fetches forwarding information from these different priority queues according round robin rule transmits related packet. higher priority level queues more likely send packets recorded less likely discard these packets. After resolving each ingress packet, switch engine obtained information perform protocol processing. device supports VLAN mode switch, which means only ports belonging same VLAN switch packets. This device
AT79C1030 Summary
3435BS-NETST-6/04
Note: This summary document. complete document available under NDA. more information, please contact your local Atmel sales office.
also supports filtering special packets prevent unnecessary flow, such broadcast storms, broadcast/ARP packets discarded according user settings.
Overview
Ethernet Packet Reception Transmission AT79C1030 complies with IEEE 802.3 MII/GMII specification. switch supports full/half duplex mode. full-duplex mode, from same port, switch receives transmits packets same time; line flow control performed sending resolving pause frames. half-duplex mode, reception transmission can't take place from same port same time. When collision occurs, packet should retransmitted according back-off algorithm. Line flow control implemented back-pressure algorithm.
switch works 10/100/1000Mb/s both full/half duplex modes. full half duplex mode data rate selected auto-negotiation manually. order support autonegotiation MDIO interface implemented. Receiving Operation device calculates size ingress packet decides whether size packet legal. same time, check performed verify whether input packet data right. switch adds, removes, changes egress packet according related settings. device re-calculates this packet again ensure sending right packet case packet data modified.
Transmitting Operation
Figure AT79C1030 Block Diagram
RS-232
VLAN TABLE TABLE
SWITCH CORE
MEMORY MANAGER
MEMORY
REGISTER
FIFO
FIFO
FIFO
FIFO
MDIO
GMII/MII
AT79C1030
3435BS-NETST-6/04
AT79C1030
Figure Application Diagram
Transformer
Transformer
Transformer
Transformer
10/100/1000Mbps
10/100/1000Mbps
10/100/1000Mbps
10/100/1000Mbps GMII/MII Interface
AT79C1030
Interface
GMII/MII Interface 10/100/1000Mbps 10/100/1000Mbps 10/100/1000Mbps 10/100/1000Mbps
Transformer
Transformer
Transformer
Transformer
3435BS-NETST-6/04
Electrical Characteristics
Absolute Maximum Ratings*
Parameter Power Supply (Digital Logic) Power Supply (Input/Output) Storage Temperature Power Dissipation Commercial *NOTICE: Range ±10% Unit
Stresses beyond those listed under "Absolute Maximum Ratings" cause permanent damage device. This stress rating only functional operation device these other conditions beyond those indicated operational sections this specification implied. Exposure absolute maximum rating conditions extended periods affect device reliability.
AT79C1030
3435BS-NETST-6/04
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3435BS-NETST-6/04

8-Port Gigabit Ethernet Switch Description AT79C1030 device

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