RTL8305S

RTL8305S RTL8305S 5-PORT 10/100 MBPS SINGLE CHIP SWITCH CONTROLLER 1. Features ..................................................................................................................................................................................... 2 2. General Description .................................................................................................................................................................. 2 3. Block Diagram .......................................................................................................................................................................... 3 4. Pin Assignments........................................................................................................................................................................ 4 5. Pin Descriptions ........................................................................................................................................................................ 6 5.1 Media Connection Pins ....................................................................................................................................................... 6 5.2 Mode Pins ........................................................................................................................................................................... 6 5.3 Port4 Related Pins............................................................................................................................................................... 7 5.4 LED Pins............................................................................................................................................................................. 8 5.5 Power Pins .......................................................................................................................................................................... 8 5.6 Miscellaneous Pins.............................................................................................................................................................. 8 5.7 Reserved Pins...................................................................................................................................................................... 8 6. Functional Description.............................................................................................................................................................. 9 6.1 Introduction......................................................................................................................................................................... 9 6.2 Switch Core Functional Overview ...................................................................................................................................... 9 6.2.1 Address Search, Learning and Aging........................................................................................................................... 9 6.2.2 Buffer Management.................................................................................................................................................... 10 6.2.3 Data Reception ........................................................................................................................................................... 10 6.2.4 Data Forwarding......................................................................................................................................................... 10 6.2.5 Flow Control ...............................................................................................................................................................11 6.2.6 Back-off Algorithm .....................................................................................................................................................11 6.2.7 Inter-Frame Gap ..........................................................................................................................................................11 6.2.8 Illegal Frame ...............................................................................................................................................................11 6.2.9 Broadcast Storm Control.............................................................................................................................................11 6.3 Physical Layer Functional Overview .................................................................................................................................11 6.3.1 Auto-negotiation .........................................................................................................................................................11 6.3.2 10Base-T Transmit Function.......................................................................................................................................11 6.3.3 10Base-T Receive Function ........................................................................................................................................11 6.3.4 Link Monitor ...............................................................................................................................................................11 6.3.5 100Base-TX Transmit Function ................................................................................................................................. 12 6.3.6 100Base-TX Receive Function .................................................................................................................................. 12 6.3.7 Power Saving Mode ................................................................................................................................................... 12 6.4 LED................................................................................................................................................................................... 12 6.5 MII Port............................................................................................................................................................................. 13 6.5.1 General Description ................................................................................................................................................... 13 6.5.2 MII/SNI PHY Mode................................................................................................................................................... 16 6.5.3 MII MAC Mode ......................................................................................................................................................... 16 7. Electrical Characteristics......................................................................................................................................................... 18 7.1 Absolute Maximum Ratings ............................................................................................................................................. 18 7.2 Operating Range ............................................................................................................................................................... 18 7.3 DC Characteristics (0°C