[ADMtek Inc.]

Overview
The ADM6926 is a high performance/low cost, twenty six-port 10/100 Mbps Ethernet Switch Controller with all ports supporting 10/100 Mbps full duplex switch function. The ADM6926 is intended for applications to standalone-bridge for the low cost ether switch market. ADM6926 can be programmed trunking port active. The trunking port can be connected to server or stacking two switch boxes to enhance the performance.

Features
• Support twenty four 10/100M auto-detect Half/Full duplex switch ports with SS-SMII interface and two 10/100M Half/Full duplex port with RMII/MII interface
• Supports up to 4096 MAC addresses table (4-way hashing)
• Support two queue for QOS (1:2 or 1:4 or 1:8 or 1:16)
• Support Port-base, 802.1p and IP TOS priority
• Supports store & forward architecture and Performs forwarding and filtering at nonblocking full wire speed
• Support buffer allocation with 256 bytes each
• Supports aging function and 802.3x flow control for full duplex and back-pressure function for half duplex operation in case buffer is full
• Support packet length up to 1536 bytes
• Support Congestion Flow Control
• Broadcast storm filter and Alert LED
• Port-base VLAN and adjustable VLAN to support up to 32 VLAN group
• serial CPU interface for counter and port status output
• CPU can see-through to access PHY
• flexible port trunking on fault tolerance and load balance
• per port 32bits smart counter for Rx/Tx byte/packet count, error count and collision count
• rate-limit control (64K/128K/256K/512K/1M/4M/10M/20M)
• per port auto learning enable/disable and if disable, forward non-learned packet to CPU
• MAC address table accessible (in each entry, reserve one bit for CPU to enable/disable aging out)
• forward special multicast, BPDU, GMRP, GVRP and IGMP packets to CPU port
• 128 pin QFP package with 3.3V/1.8V power supply