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