ADM6999U/UX
Data Sheet
Introduction
1
Introduction
1.1
General Description
The ADM6999U/UX is a high performance, low cost, and highly integration (Controller, PHY and Memory) eight-
port 10/100 Mbps TX/FX plus one 1.6G Expansion port Ethernet switch controller with all ports supporting 10/100
Mbps Full/Half duplex switch function. The ADM6999U/UX is intended for applications to stand alone the bridge
for low cost 16 Port Switch. The ADM6999UX is the environmentally friendly “green” package version.
ADM6999U/UX provides most advanced functions such as: 802.1p (Q.O.S.ADM6999U/UX), 802.1q (VLAN),
Port MAC Address Locking, Management, Port Status, TP Auto-MDIX, 25M Crystal & Extra ninth Port
(RMII/MII/GPSI) functions to meet the customer’s requests on Switch demand.
The built-in 768K SRAM used for the packet buffer and address learning table is divided into 512 bytes/block to
achieve the optimized memory utilization through complicated link list on packets with various lengths.
ADM6999U/UX also supports priority features by Port-Base, VLAN and IP TOS field checking. Users can easily
set as different priority mode in individual port, through a small low-cost micro controller to initialize or on-the-fly
to configure. Each output port supports two queues in the way of fixed N: 1 fairness queuing to fit the bandwidth
demand on various types of packet such as Voice, Video and data. 802.1Q, Tag/Untag, and up to 32 groups of
VLAN are also supported. ADM6999U/UX learns user define 4 or 5 bits of VLAN ID.
An intelligent address recognition algorithm makes ADM6999U/UX to recognize up to 2048 different MAC
addresses and enables filtering and forwarding at full wire speed.
Port MAC address Locking function is also supported by ADM6999U/UX to use on Building Internet access to
prevent multiple users share one port traffic.
1.2
Features
Main features:
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Supports eight 10M/100M auto-detect Half/Full duplex switch ports with TX/FX interfaces and one 1.6G
Expansion Port.
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Built-in 12Kx64 SRAM.
Supports 2048 MAC addresses table.
Supports two queue for Qos.
Supports priority features by Port-Based, 802.1p VLAN & IP TOS of packets.
Supports Store & Forward architecture and perform forwarding and filtering at non-blocking full wire speed.
Supports buffer allocation with 512 bytes per block.
Supports Aging function Enable/Disable.
Supports Serial & Scan LED mode with Power On auto diagnostic.
Supports 802.3x Flow Control pause packet for Full Duplex in case buffer is full.
Supports Back Pressure function for Half Duplex operation in case buffer is full.
Supports packet length up to 1522 bytes.
Broadcast Storming Filter function.
Supports 802.1Q VLAN. Up to 16/32 VLAN groups is implemented by user define four/five bits of VLAN ID.
Supports MAC-clone feature.
Supports TP interface Auto MDIX function for auto TX/RX swap by strapping-pin.
Easy Management 32bits smart counter for per port RX/TX byte/packet count, error count and collision count.
Supports PHY status output for management system.
25M Crystal only for the whole system.
128 QFP package with 0.18um technology. 1.8V/3.3V power supply.
Data Sheet
8
Rev. 1.42, 2005-11-25
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