and classification to migrate towards dedicated hardware devices. The
Forwarding.
to work with any NPU having a QDR鈩?look aside interface. Multiple
devices including the QDR鈩?NSE can be connected to the same QDR鈩?/div>
interface. Each QDR鈩?NSE device may be point-to-point expanded up
to eight NSE devices.
NSE Features
x
x
x
External Interfaces
The following external interfaces are supported by the QDR鈩?NSE device
x
Single QDR鈩?NPU interface
- QDR鈩?Clock Frequency up to 250 MHz
- Supports QDR鈩?burst of 2
- Echo clocks supported (CQ,
CQ)
x
Point-to-Point Cascading Interface
- Up to eight NSEs can be cascaded using this scheme
x
Associated Data SRAM with standard ZBT廬 Interface
x
Boundary Scan JTAG Interface (IEEE 1149.1)
x
x
x
x
x
x
x
x
x
x
x
x
x
128K x 72 (9M) or 64K x 72 (4.5M) Data and Mask cells
Full Ternary Content Addressable Memory
Advanced Database Management
- Selectable Databases
- Programmable Width per Database
- Lookup widths from 32 to 576 bits
- Only the selected Database is powered
Lookup Instructions
- Standard Lookup
- Multi-Hit Lookup
- Multi-Database Lookup
- Re-Issue Multi-Database Lookup
Maintenance Features
- Aging
- Multi Hit Invalidate
- Learn per Database
Multi-Context support
Pool of (72-bit) Global Mask Registers (shared across contexts)
In-Band Control and Management
Assoicated Data SRAM is supported through a glue-less ZBT廬
interface
Lowest Power per Application
Synchronous Pipeline Operation
Boundary Scan JTAG Interface
1.2V Core Supply
1.5V HSTL I/O Supply
2.5V I/O Supply for ZBT廬 Associated Data SRAM
35mm x 35mm BGA Package
Figure 1.0 QDR鈩?NSE External Interfaces
QDR
Read
Control
Logic
256K x 36 Full
Ternary Content
Addressable Memory
Cascade
Interface
QDR
Write
Control
Logic
ZBT
Interface
JTAG Interface
6070 drw04aa
JANUARY 2003
1
漏
2002 Integrated Device Technology, Inc. All rights reserved. Product specifications subject to change without notice.
DSC-6070/00
ZBT and ZeroBus Turnaround are trademarks of Integrated Device Technology, Inc. and the architecture is supported by Micron Technology and Motorola Inc.
QDR鈩?- Quad Data Rate (Trademark of Cypress, IDT, Micron, NEC and Samsung.) All brands or products are the trademarks or registered trademarks of their
respective owners.
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