MCM69C233WP Datasheet, PDF (1/16 Pages) Motorola, Inc – MPC8260 PowerQUICC II-TM to CAM Interfacing - MCM69C233

White Paper
Freescale Semiconductor, Inc.
MCM69C233WP/D
Rev. 2, 1/2003
MPC8260 PowerQUICC II^TM
to CAM Interfacing –
MCM69C233
Eric Jackson
Technical Marketing,
NCSD
Networking &
Computing Systems
Group
The purpose of this document is to provide the designer a hardware method of interfacing the
Motorola MPC8260 PowerQUICC II^TM Integrated Communications Processor with the
MCM69C233 Motorola Flexible Content Addressable Memory (CAM).
The following topics are addressed:
Topic
Section 1, “MPC8260 PowerQUICC II^TM”
Section 2, “Motorola Content Addressable Memories (CAMs)”
Section 3, “CAM Interface”
Section 4, “MPC8260 Register Programming”
Section 5, “References”
Page
1
1
2
4
12
1 MPC8260 PowerQUICC II^TM
Motorola’s PowerQUICC II^TM processor family is the next generation of Motorola’s leading
PowerQUICC line of integrated communication processors. The MPC8260 integrates two
main components, the embedded MPC603e G2 core and the Communications Processor
Module (CPM). The CPM simultaneously supports three fast serial communications
controllers (FCCs), two multichannel controllers (MCCs), four serial communications
controllers (SCCs), two serial management controllers (SMCs), one serial peripheral interface
(SPI), and one I2C interface.
2 Motorola Content Addressable Memories
(CAMs)
The MCM69C233 is a flexible content addressable memory (CAM) that can contain 4096
entries of 64 bits. It is implemented with standard 4-transistor SRAM cells. The widths of the
match field and the output field are programmable. At 66 MHz, the match time is designed to
be less than or equal to 210 nanoseconds. As a result, the Motorola CAM is well suited for
datacom applications such as Virtual Path Identifier/Virtual Circuit Identifier (VCI/VPI)
translation in ATM switches up to OC12 (622 Mbps) data rates and Media Access Control
(MAC) address lookup in Ethernet/Fast Ethernet bridges. The CAM is also well suited for
fully associative disk drive cache and RAID applications. The match request rate of the
MCM69C233 is user defined with a trade-off between the match request rate and the rate of
new entries added to the CAM.
For More Information On This Product,
Go to: www.freescale.com