如题：
RTL8304E资料：
Features
Basic Switching Functions
4-port switch controller with 2 transceivers for 10Base-T and 100Base-TX and 2-port (T)MII/RMII
Non-blocking wire-speed reception and transmission and non-head-of-line-blocking forwarding
Complies with IEEE 802.3/802.3u auto-negotiation
Built-in high efficiency SRAM for packet buffer, with 2K-entry lookup table and two 4-way associative hash algorithms
2047 byte maximum packet length
Flow control fully supported:
Half duplex: Back pressure flow control
Full duplex: IEEE 802.3x flow control
Service Quality
Supports high performance QoS function on each port:
Supports 4-level priority queues
Weighted round robin service
Supports strict priority
Input/Output port bandwidth control
Queue based bandwidth control
ACL-based, 1Q-based, Port-based, DSCP-based, VID-based, IP address-based, and other types of priority assignments
Supports 16-entry ACL for advanced applications
Supports IEEE 802.1p Traffic Re-marking
Supports IGMP v1/v2/v3 and MLD v1/v2 snooping
Security and Management
Supports MAC Limit
Supports Port Isolation
Supports IEEE 802.1x
Lookup Table is accessible via SMI
Supports 32-bit smart counter for per port RX/TX byte/packet count, collision counter, and error counter
Supports reserved control frame filtering
Supports advanced storm filtering
Supports Port Mirroring
Supports interrupt for CPU application
Supports proprietary CPU tag for traffic management
Supports SMI (Serial Management Interface) for programming and diagnostics
Optional EEPROM interface for configuration
VLAN Functions
Supports up to 16 VLAN groups
Flexible 802.1Q port/tag-based VLAN
Supports VLAN translation
Supports QinQ
Leaky VLAN for ARP/unicast/IP multicast packets
Supports external processor to maintain greater than 16 VLAN groups
Power Saving Functions
Green Ethernet Feature
Supports Energy-Efficient Ethernet (EEE) function (IEEE 802.3az)
Supports Wake-on-LAN (WOL)
Supports system power management based on link and CPU port traffic loading
Diagnostic Functions
Supports IEEE 802.1D
Supports hardware loop detection function with LEDs and buzzer to indicate the existence of a loop
Supports cable diagnosis (RTCT function)
Supports MAC and PHY loopback function for diagnosis
Flexible LED indicators for link, activity, speed, as well as user defined LED output
Loop status indication
LEDs blink upon reset for LED diagnostics
Other Features
Optional MDI/MDIX auto crossover for plug-and-play
Physical layer port Polarity Detection and Correction function
Robust baseline wander correction for improved 100Base-TX performance
25MHz crystal or 3.3V/1.8V OSC input
Single 3.3V power input can be transformed to 1.8V via a low-cost external BJT transistor
Low power, 1.8/3.3V, 0.153µm CMOS technology
64-pin QFN ‘Green’ package
Applications
HomePNA/HomePlug bridge solutions
Set-Top Box, TV, and VoIP applications
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