Integrated Public-Key Processing: The 4450 contains an integrated public-key
accelerator subsystem. This unit speeds the computation of the large-vector math required
for public-key operations such as Diffie-Hellman, RSA and DSA. The 4450 includes native
support for public key modulus sizes up to 4096 bits.
AES Support: The advanced encryption standard, AES, is fully supported. The 4450
supports AES key lengths of 128 and 256-bits, in CBC, CTR, CCM and GCM modes.
Compatibility: The 4450 FlowThrough Security Processor is compliant with IETF standards
for IPsec and IPcomp. Optional on-chip Internet Key Exchange (IKE) firmware assures
interoperability.
DDR2 SDRAM
SerDes
4450
RGMII
RTBI/
SGMI/
GMIII/
TBI
(SA’s & IKE)
SerDes
RGMII
RTBI/
SGMII
Dual GigE TOE
or
SFP
SFP
Storage
Processor
with Integrated
GigE MAC
SerDes
RGMII
RTBI/
SGMII
SerDes
RGMII
RTBI/
SGM II/
GMII/
TBI
0.75V
1.5V
1.0V
2.5V
3.3V
PCI-X
or
PCI -Express
Voltage
Regulation
Osc.
Figure 1-1. 4450 System Concept
The 4450 is typically interfaced between the Gigabit port on a GbE MAC, Storage Processor,
TOE, or Switch and the Gigabit Ethernet PHY. The 4450 supports two independent full-
duplex gigabit Ethernet channels through four configurable GbE ports. The Host and
Network GMII (Host Only), RGMII or SGMII interfaces can be configured to run at 10/100
speeds for applications only requiring 10/100 FE Compatibility. The control interface to the
4450 can be achieved using in-band Ethernet frames. An additional 100Mbps Ethernet RMII
port allows an optional out-of-band control port. The 4450 also includes a single DDR2
SDRAM interface. The external memory is used for storage of local SA records and/or for
program and data storage for the on-board embedded Session Control (eSC) processor.
4450 – Data Sheet, DS-0131-06
Page17
Hifn Confidential
EXAR [ EXAR CORPORATION ]
