adm6995 ETC-unknow, adm6995 Datasheet - Page 7

• Manufacturer Part Number: adm6995
• Description: Port 10/100 Mb/s Single Chip Ethiernet Switch Controller
• Manufacturer: ETC-unknow

ADM6995L
ADMtek Inc.
Chapter 1 Product Overview
1.1
Overview
The ADM6995L is a high performance, low cost, highly integrated (Controller, PHY and
Memory) five-port 10/100 Mbps TX/FX Ethernet switch controller with all ports
supporting 10/100 Mbps Full/Half duplex. The ADM6995L is intended for applications
to stand alone bridge for the low cost SOHO market.
ADM6995L provides advanced functions such as: 802.1p(Q.O.S.), 802.1q(VLAN), Port
MAC address Locking, Management, Port Status, TP Auto-MDIX & 25M Crystal
functions to meet customer requests on Switch demands.
The ADM6995L also supports Back Pressure in Half-Duplex mode and the 802.3x Flow
Control Pause packet in Full-Duplex mode to prevent packet loss when the buffer is full.
When Back Pressure is enabled, and there is no receive buffer available for the incoming
packet, the ADM6995L will issue a JAM pattern on the receiving port in Half Duplex
mode and transmit the 802.3x Pause packet back to the receiving end in Full Duplex
mode.
The built-in SRAM is used for packet buffering and the address-learning table is divided
into 256 bytes/block to achieve the optimized memory utilization through complicated
link lists on packets with various lengths.
ADM6995L also supports priority features such as Port-Based VLAN and IP TOS field
checking. Users can easily set different priority modes in individual ports, through a
small low-cost micro controller used to initialize or used on the fly to configure. Each
output port supports four queues in the way of fixed N: 1 fairness queuing to fit the
bandwidth demand on various types of packets such as Voice, Video and data. 802.1Q,
Tag/Untag, and up to 16 groups of VLAN are also supported.
An intelligent address recognition algorithm gives ADM6995L the ability to recognize up
to 2048 different MAC addresses and enables filtering and forwarding at full wire speed.
The port MAC address Locking function is also supported by ADM6995L to use on
Building Internet access to prevent multiple users sharing one port traffic.
Product Review
1-1