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DM9106

10/100 Mbps 3-port Ethernet Switch Controller with PCI Interface

Davicom Semiconductor, Inc. 

DM9106

3-port switch with PCI Interface

9. FUNCTIONAL DESCRIPTION....................................................................................... 64

9.1 PCI BUS BUFFER MANAGEMENT.................................................................................................................... 64

9.1.1. Overview ............................................................................................................................................. 64

9.1.2. Data Structure and Descriptor List...................................................................................................... 64

9.1.3. Buffer Management : Ring Structure Method ..................................................................................... 64

9.1.4. Buffer Management : Chain Structure Method ................................................................................... 64

9.1.5. Descriptor List: Buffer Descriptor Format ........................................................................................... 65

9.1.2. Transmit Data Buffer Processing........................................................................................................ 72

9.2 SWITCH FUNCTION:........................................................................................................................................ 73

9.2.1 Address Learning................................................................................................................................. 73

9.2.2 Address Aging...................................................................................................................................... 73

9.2.3 Packet Forwarding ............................................................................................................................... 73

9.2.4 Inter-Packet Gap (IPG) ........................................................................................................................ 73

9.2.5 Back-off Algorithm................................................................................................................................ 73

9.2.6 Late Collision ....................................................................................................................................... 73

9.2.7 Half Duplex Flow Control ..................................................................................................................... 73

9.2.8 Full Duplex Flow Control...................................................................................................................... 73

9.2.9 Partition Mode...................................................................................................................................... 73

9.2.10 Broadcast Storm Filtering .................................................................................................................. 74

9.2.11 Bandwidth Control ............................................................................................................................. 74

9.2.12 Port Monitoring Support..................................................................................................................... 74

9.2.13 VLAN Support .................................................................................................................................... 75

9.2.13.1 Port-Based VLAN ........................................................................................................................... 75

9.2.13.2 802.1Q-Based VLAN ...................................................................................................................... 75

9.2.13.3 Tag/Untag ....................................................................................................................................... 75

9.2.14 Priority Support .................................................................................................................................. 76

9.2.14.1 Port-Based Priority.......................................................................................................................... 76

9.2.14.2 802.1p-Based Priority ..................................................................................................................... 76

9.2.14.3 DiffServ-Based Priority ................................................................................................................... 76

9.3 MII INTERFACE .............................................................................................................................................. 77

9.3.1 MII data interface ................................................................................................................................. 77

9.3.2 MII Serial Management........................................................................................................................ 77

9.3.3 Serial Management Interface............................................................................................................... 78

Preliminary datasheet

5

DM9106-DS-P01

July 9, 2009

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