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发表于 2009-5-23 12:52:29
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The RTL8650B/RTL8651B is embedded with a PCI host interface to access high-speed devices, providing enhanced application capabilities.
With the built-in layer 2/3/4 switching architecture, the RTL8650B/RTL8651B provides wire-speed performance for not only layer 2 switching, but also IP and NAT switching. This unique architecture frees the embedded CPU from software routing cycles so that the CPU horsepower can be fully utilized to provide the most efficient services.
Features
System Processor
LX5280 32-bit RISC CPU, clock rates up to 200MHz
Embedded 4K I-Cache, 4K D-Cache, 8K I-MEM, 4K D-MEM
Integrated Switch
6-port integrated MAC switch with 5-port physical layer and transceiver for 10Base-T and 100Base-TX
Automatic MDI/MDX crossover on all ports
Supports sixth Port 5, MAC interface with 3 configurations to connect to external MAC or PHY
PHY mode MII (also known as Reverse MII) for router application
PHY mode SNI (also known as GPSI or 7 wires) for router application
MAC mode MII for HomePNA or other PHY application
L2 Capabilities
1024-entry 4-way hash look-up table and 16-entry CAM
Supports source and destination MAC address filtering
Supports 8 active VLANs with 4096 VID number spaces to distinguish IP interfaces
Supports port-based and packet-tagged VLANs
Supports VLAN-based spanning tree forwarding
Non-blocking wire-speed reception and transmission and non-head-of-line-blocking forwarding
Complies with IEEE 802.3, 802.3u, 802.1D, and 802.1Q
Flexible full-duplex 802.3x flow control and optional half-duplex backpressure flow control
L3 Capabilities
Supports 8-entry IPv4 hardware routing table and longest-prefix-matching table lookup
Supports hardware ARP table for host IP addresses
L4 Capabilities
Supports hardware-switched Network Address Port Translation (NAPT) for TCP, UDP, and ICMP protocols
Supports hardware-switched 1-1 Network Address Translation (NAT) for IP protocol
Supports hardware-switched server ports (virtual servers)
Supports Application Level Gateway (ALG) tables for packets that should be further processed by software
QoS Support
Supports 2-level QoS based on port, VLAN tag, TCP/IP TOS/DS, L2/L3 table entry, and firewall rule
Supports policy-based QoS
PPPoE Support
Supports configurable automatic PPPoE encapsulation and decapsulation
Up to 8 PPPoE sessions
Firewall Capabilities
Supports 128 hardware Access Control List (ACL) rules for packet filtering
Supports both ingress and egress filtering
Supports Stateful Packet inspection (SPI) firewall
Supports whole packet inspection function to scan contents of incoming packets
Supports policy-based routing function
Supports policy-based QoS function
Supports policy-based mirroring function
Peripherals
USB v1.1 host controller
33MHz PCI v2.2 host interface for glueless connection of up to two devices
Two 16C550-compatible UARTs
22 GPIOs
System Design
208-pin PQFP package for RTL8650B
292-pin TFBGA package for RTL8651B
3.3V power supply
Applications
Broadband IP-sharing gateways
Wireless gateways
L3 switches
High-performance FTTx routers
Firewall and VPN appliances
Residential gateways |
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发表于 2009-5-23 12:51:35
