OVERVIEW
The BCM1255 device is an MIPS64 processor core-based system-on-a-chip (SOC) that offers industry-leading performance, high functional integration, and low-power levels required by next-generation computing, storage, and networking applications.

FEATURES
• 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)

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