BCM1255 Ver la hoja de datos (PDF) - Broadcom Corporation
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BCM1255 Datasheet PDF : 2 Pages
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BCM1255
®
DUAL-CORE 64-BIT MIPS® PROCESSOR (NEW!)
FEATURES
SUMMARY OF BENEFITS
• Two 64-bit MIPS® CPUs, scalable from 800 MHz–1.2 GHz
• 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)
• Fast on-chip multiprocessor bus
• 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
• 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
• DDR memory controller
• 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
• Integrated network and system I/O
• Four Gigabit-Ethernet MACs configurable as packet FIFO
interfaces
• 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
• On-chip debug capability
• EJTAG
• 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
GMII
Control path
BCM1255
GMII
GMII
Data path
FIFO
BCM5841
2 Gbps Full-Duplex IPSec
• Industry-leading performance
• 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
• Low-power dissipation of 13W @ 1 GHz
• High functional integration, reducing overall system cost
• Programming ease and flexibility based on MIPS64™
instruction set architecture (ISA)
• Software compatible with BCM1250 and BCM112x
• Broad tools and system software support
APPLICATIONS
• 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
• Multifunction security platforms (VPN/SSL/IDS)
• Compact NAS platforms
• SAN routers/gateways/switches
• Video servers and systems
Storage System or Video Server
DRAM
SATA Disk Drives
...
BCM1255
ServerWorksTM
PCI-X
SATA
Bridge
4 x GMII
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