BCM1255
®
DUAL-CORE 64-BIT MIPS® PROCESSOR (NEW!)
S U M M A R Y O F B E N E F I T S
F E A T U R E S
®
Two 64-bit MIPS CPUs, scalable from 800 MHz–1.2 GHz
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Industry-leading performance
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Quad issue in-order pipeline with dual-execute and dual-memory
pipes
Enhanced skew pipeline enables a zero load-to-use penalty
32-KB instruction cache and 32-KB data cache (ECC protected)
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2.5 Dhrystone MIPS/MHz per CPU
10 Million packets per second of L3 forwarding
128 Gbps on-chip bus bandwidth, with 100 Gbps memory
bandwidth and 31 Gbps 1/0 bandwidth
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Fast on-chip multiprocessor bus
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Low-power dissipation of 13W @ 1 GHz
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Connects the CPUs, L2 cache, memory controller, and I/O
bridges
High functional integration, reducing overall system cost
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Runs at half the CPU core frequency and is 256 bits wide
Programming ease and flexibility based on MIPS64™
instruction set architecture (ISA)
On-chip L2 cache
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512 KB shared by two CPUs and I/O agents
Eight-way associative, ECC protected
Any way can be programmed as fast on-chip RAM
Software compatible with BCM1250 and BCM112x
Broad tools and system software support
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DDR memory controller
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Memory bandwidth as high as 100 Gbps
Configurable as 2x64-bit or 4x32-bit wide channels
Runs up to 400-MHz clock rate, 800-MHz data rate
Support for DDR1, DDR2, and FCRAM
A P P L I C A T I O N S
Integrated network and system I/O
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Four Gigabit-Ethernet MACs configurable as packet FIFO
interfaces
Because of its world-class performance, power efficiency, and
integration, the BCM1255 processor is ideal for a broad variety of
applications, including:
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64-bit PCI-X interface at 133 MHz
Generic I/O for direct connect to boot ROM, flash memory
Two SMBus serial configuration interfaces
PCMCIA control interface and up to 16 interrupts
Four UART interfaces
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Enterprise-class routers and switches
Multifunction security platforms (VPN/SSL/IDS)
Compact NAS platforms
SAN routers/gateways/switches
Video servers and systems
On-chip debug capability
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EJTAG
Bus trace unit (internal logic analyzer)
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Support for leading operating systems, including VxWorks ,
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Linux , QNX , and NetBSD
Evaluation board platform available with samples (includes
tools, firmware, and software drivers)
VPN/Firewall Application
Storage System or Video Server
SATA Disk Drives
DRAM
DRAM
...
GMII
TM
ServerWorks
Control path
SATA
Bridge
PCI-X
BCM1255
BCM1255
GMII
GMII
Data path
FIFO
BCM5841
4 x GMII
2 Gbps Full-Duplex IPSec
5秒后页面跳转
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