gwixp425bdt Intel Corporation, gwixp425bdt Datasheet - Page 20

• Manufacturer Part Number: gwixp425bdt
• Description: Intel Xp42x Product Line Of Network Processors And Ixc1100 Control Plane Processor
• Manufacturer: Intel Corporation

Intel
2.1
2.1.1
Table 4.
March 2005
20
®
IXP42X Product Line of Network Processors and IXC1100 Control Plane Processor
Functional Units
The following sections briefly describe the functional units and their interaction in the system. For
more detailed information, refer to the Intel
IXC1100 Control Plane Processor Developer’s Manual.
Unless otherwise specified, the functional descriptions apply to all processors in the IXP42X
product line and IXC1100 control plane processors. Refer to
page 15
Network Processor Engines (NPEs)
The network processor engines (NPEs) are dedicated-function processors containing hardware
coprocessors integrated into the IXP42X product line and IXC1100 control plane processors. The
NPEs are used to off-load processing functions required by the Intel XScale core.
These NPEs are high-performance, hardware-multi-threaded processors with additional local-
hardware-assist functionality used to off-load highly processor-intensive functions such as MII
(MAC), CRC checking/generation, AAL 2, AES, DES, SHA-1, and MD5. All instruction code for
the NPEs are stored locally with a dedicated instruction memory bus and dedicated data memory
bus.
These NPEs support processing of the dedicated peripherals that can include:
Table 4
processors, have which of these capabilities.
Processor Functions
The NPE core is a hardware-multi-threaded processor engine that is used to accelerate functions
that are difficult to achieve high performance in a standard RISC processor. Each NPE core is a 133
MHz processor core that has self-contained instruction memory and self-contained data memory
that operate in parallel.
Intel
Processor
Intel
Processor
Intel
Processor
Intel
Processor
Intel
Processor
Intel
Plane Processor
•
•
•
®
®
®
®
®
®
A Universal Test and Operation PHY Interface for ATM (UTOPIA) 2 interface
Two High-Speed Serial (HSS) interfaces
Two Media-Independent Interfaces (MII)
IXC1100 Control
IXP425 Network
IXP423 Network
IXP422 Network
IXP421 Network
IXP420 Network
Device
specifies which devices, in the IXP42X product line and IXC1100 control plane
through
,
B-Step
Figure 5
Document Number: 252479, Revision: 005
UTOPIA
X
X
X
for specific information on supported interfaces
HSS
X
X
X
MII 0
X
X
X
X
X
X
®
MII 1
IXP42X Product Line of Network Processors and
X
X
X
X
X
AES / DES /
DES3
X
X
Table 3 on page 14
Multi-Channel
HDLC
8
8
8
SHA-1 /
MD-5
and
X
X
Figure 1 on
Datasheet