ACD82224 Datasheet, PDF (4/77 Pages) List of Unclassifed Manufacturers – 24 Ports 10/100 Fast Ethernet Switch

1. GENERAL DESCRIPTION
The ACD82224 is a single chip implementation of 24-port 10/100 Ethernet switch system
intended for IEEE 802.3 and 802.3u compatible networks. The device includes 24 independent
10/100 MACs. Each MAC interfaces with an external PMD/PHY device through a Reduced MII
(RMII) interface. The last port is RMII and MII selectable. When in MII mode, this port becomes a
shared port with the in-band management CPU. Link, Speed, and Duplex can be automatically
configured through the MDIO port. Each port can operate at either 10Mbps or 100Mbps. The
core logic of the ACD82224, implemented with patent pending BASIQ (Bandwidth Assured
Switching with Intelligent Queuing) technology, can simultaneously process 24 asynchronous
10/100Mbps port traffic. The Queue Manager inside the ACD82224 provides the capability of
routing traffic with the same order of sequence, without any packet loss.
A complete 24-port 10/100 switch can be built with the addition of 10/100 RMII PHY and SRAM
(ZBT^{TM 1}or compatible). An additional 11K MAC addresses can be supported with the use of
ACD’s Address Resolution Logic (ARL) chip, the ACD80800. Advanced network management
features can be supported with the use of ACD’s Management Information Base (MIB) chip, the
ACD80900. The single universal 388-pin PBGA package for all 3 controllers makes One-PCB-
For-ALL three systems very easy to implement, which significantly reduce the cost and time
associated with multiple system product development.
Figure-1.1: ACD82224 Based 24 Ports Single Chip Un-managed 10/100 Switch System
PHYs, Transformers & RJ45 Not
Populated for ACD82216 16-port System
MAG
23-20
MAG
19-16
MAG
15-12
MAG
11-8
Quad
RMII
PHY
4 RMII
Bus
Quad
RMII
PHY
4 RMII
Bus
Quad
RMII
PHY
4 RMII
Bus
Quad
RMII
PHY
4 RMII
Bus
MAG
7-4
MAG
3-0
Quad
RMII
PHY
4 RMII
Bus
Quad
RMII
PHY
4 RMII
Bus
ZBT
SRAM
SRAM BUS
ACD822xx
100 MHz
OSC
1
ZBT is the trade mark of IDT.
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