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RTL8305H
Single-Chip 5-Port Ethernet Switch Controller with HEAC Transceiver
 
General Description

The RTL8305H is a new generation of Ethernet switch controller that integrates two HDMI Ethernet and Audio Return Channel (HEAC) transceivers, one Gigabit Physical layer transceiver for 1000Base-T, 100Base-TX and 10Base-T operation, and one Fast Ethernet Physical layer transceiver for 100Base-TX and 10Base-T operation. The RTL8305H also supports one RGMII/(T)MII/RMII interface and one (T)MII/RMII interface to provide access via an external CPU.

The RTL8305H can smoothly forward Ethernet traffic between the Gigabit Ethernet, Fast Ethernet, RGMII/(T)MII/RMII, and HEAC ports at wire speed. All MAC functions, VLAN, QoS, etc., are equally applied to all ports. The RTL8305H is ideal for applications such as DTV and Blu-ray player that implement the HDMI1.4 and IEEE 802.3 Ethernet function.

The RTL8305H HEAC PHY provides a full duplex 100Mbps Ethernet link via one differential pair. The HEAC PHY can also carry IEC 60958-1 standard audio data from an HDMI sink to an HDMI source or Repeater simultaneously.

The RTL8305H features an embedded 8051 CPU to execute the programs in the internal 64K ROM, or the external EEPROM. With the embedded 8051 and internal memory controller, the RTL8305H supports IGMP/MLD snooping and Rapid Spanning Tree Protocol (RSTP) functions without any additional external CPU loading.

The RTL8305H provides a 2K-entry table and 16-entry CAM with a 4-way hash algorithm for layer-2 MAC address learning and searching, and a 128-entry IGMP Group table with 8-way hash table for IP multicast forwarding.

With four physical queues in each port, the RTL8305H provides four types of packet scheduling, including SP (Strict Priority), WRR (Weighted Round Robin), WFQ (Weighted Fair Queuing) and IEEE 802.1-Qav specified credit-based shaper (CBS) for Ethernet AV. These QoS mechanisms fulfill the QoS requirements in the HDMI 1.4 Specification. Per-port ingress/egress bandwidth control and per-port/per-queue egress bandwidth control are supported.

The RTL8305H supports a 64-entry Access Control List (ACL) that parses various protocol packet types and performs configurable actions, e.g. Permit/Drop, redirect, and traffic policing.

For power saving purposes, the RTL8305H supports Realtek’s Green Ethernet, IEEE 802.3az Energy Efficient Ethernet (EEE), and Wake-On-LAN (WOL) functions to reduce both chip and whole system power consumption.

 
Features
  • Interfaces
    • Integrates two HEAC PHYs, one Gigabit PHY, and one FE PHY
    • Supports one Channel SPDIF IO for Audio Return Channel
    • One RGMII/(R)MII/TMII and one (R)MII/TMII
    • I2C slave mode for external CPU access
    • GPIO and Parallel LED
  • Layer2 Address Lookup
    • High performance wire-speed layer-2 forwarding
    • IVL, SVL, IVL/SVL
    • 2K 4-way lookup engine and 16-entry CAM
    • Static entry
    • Source MAC blocking/Destination MAC blocking
    • Aging time from 0.1s to 20132s
  • VLAN
    • Port-based, Port and Protocol-based, IP-subnet based, MAC-based, Application-port based, 802.1Q Tag-based VLAN
    • 128 VLAN entry and 16 entry CAM, 4-way hash
    • Supports 802.1ad or Q-in-Q
    • VLAN translation for ingress
    • CVID Restoration
  • Loop Detection and Prevention
    • Supports 802.1d/1s/1w
    • 15 spanning tree instances
    • Supports RSTP without extra loading of external CPU
  • IGMP/MLD Snooping
    • Supports IGMP v1/v2/v3 (include/exclude mode) and MLD v1/v2 snooping without extra loading of external CPU
    • 128-entry IGMP Group Table, 8-way hash
    • Supports IGMP/MLD Snooping without extra loading of external CPU 
  • Power Saving
    • Supports IEEE 802.3az (Energy Efficient Ethernet, EEE)
    • Realtek Green Ethernet
    • Supports WOL 
  • IEEE 802.1X
    • Port-based IEEE 802.1X
    • MAC-based IEEE 802.1X 
  • Port Mirror
    • TX and RX mirror
    • Good packet, bad packet, unicast packet, multicast and broadcast packet mirror filter, drop packet mirror filter
    • Original packet mirror and modified packet mirror
    • ACL-based flow mirror 
  • Storm Suppression
    • Supports Broadcast, Multicast Unknown Unicast, Unknown Multicast storm filter
  • Access Control List (ACL)
    • Supports 64-entry ACL
    • Supports MAC, LLC, ARP, TCP, UDP, ICMP, IGMP
    • Supports per-flow traffic policing
    • Supports VID range/IPv4 range/layer4 port range/source port mask/packet length range checking 
  • QoS
    • Supports 4 priority queues
    • Supports min-max scheduling
    • Supports Strict Priority/WRR/WFQ scheduling algorithm
    • Supports Credit-Based Shaper (CBS) algorithm for Ethernet AV
    • Supports input bandwidth control from 8Kbps to 1Gbps by step 8kbps 
  • Ethernet AV
    • Supports Precision Time Protocol
    • Supports Credit-Based Shaper (CBS) algorithm
    • Supports Priority Regeneration 
  • Packet Modifier
    • Add, modify, or remove outer-tag and/or inner-tag
    • Modify IP TOS field
    • L2 Checksum recalculation 
  • Port isolation
    • Provides traffic isolation between different physical ports
  • MIB
    • MIB-II and interface MIB (RFC 1213 & 2863)
    • Ethernet-like MIB (RFC 3635)
    • RMON (RFC 1757)
    • Bridge MIB (RFC 4188) 
  • Embedded 8051
    • Boot from EEPROM/Internal ROM
    • Implement the IGMP/MLD Snooping and RSTP 
  • Process and Package
    • 0.11µm CMOS process
    • 3.3V/1.2V dual power input
    • QFN76
Applications
  • FE PHY as Host Interface in DTV Application
  • (R)MII/TMII as Host Interface in DTV Application
  • FE PHY as Host Interface in Set-Top-Box, Media Player, and BD (Blu-ray Disc) Applications
  • RGMII/(R)MII/TMII as Host Interface in Set-Top-Box, Media Player, and BD (Blu-ray Disc) Applications

 

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