DUAL-CORE 64-BIT MIPS® PROCESSOR (NEW!) FEATURES 64-bit MIPS® CPU

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DUAL-CORE 64-BIT MIPS® PROCESSOR (NEW!) FEATURES 64-bit MIPS® CPU

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BCM1255
DUAL-CORE 64-BIT MIPS® PROCESSOR (NEW!)
FEATURES 64-bit MIPS® CPUs, scalable from MHz-1.2 SUMMARY BENEFITS Industry-leading performance
Quad issue in-order pipeline with dual-execute dual-memory pipes Enhanced skew pipeline enables zero load-to-use penalty 32-KB instruction cache 32-KB data cache (ECC protected) Fast on-chip multiprocessor Connects CPUs, cache, memory controller, bridges Runs half core frequency bits wide On-chip cache shared CPUs agents Eight-way associative, protected programmed fast on-chip memory controller Memory bandwidth high Gbps Configurable 2x64-bit 4x32-bit wide channels Runs 400-MHz clock rate, 800-MHz data rate Support DDR1, DDR2, FCRAM Integrated network system Four Gigabit-Ethernet MACs configurable packet FIFO interfaces 64-bit PCI-X interface Generic direct connect boot ROM, flash memory SMBus serial configuration interfaces PCMCIA control interface interrupts Four UART interfaces On-chip debug capability EJTAG trace unit (internal logic analyzer) Support leading operating systems, including VxWorks®, Linux®, QNX®, NetBSD Evaluation board platform available with samples (includes tools, firmware, software drivers)
VPN/Firewall Application DRAM
Dhrystone MIPS/MHz Million packets second forwarding Gbps on-chip bandwidth, with Gbps memory bandwidth Gbps bandwidth Low-power dissipation
High functional integration, reducing overall system cost Programming ease flexibility based MIPS64instruction architecture (ISA)
Software compatible with BCM1250 BCM112x Broad tools system software support
APPLICATIONS Because world-class performance, power efficiency,
integration, BCM1255 processor ideal broad variety applications, including: Enterprise-class routers switches Multifunction security platforms (VPN/SSL/IDS) Compact platforms routers/gateways/switches Video servers systems
Storage System Video Server DRAM
SATA Disk Drives
GMII Control path GMII
ServerWorks SATA Bridge
BCM1255
GMII Data path
BCM1255
PCI-X
FIFO
BCM5841
GMII Gbps Full-Duplex IPSec
OVERVIEW
JTAG
Debug/ Trace
SB-1 Core
Core Bits
512K Cache
Memory Controller
Gbps
Serial Interfaces Dual SMBus Bridge 64-Bit 10/100/ 1000
ZBbus
core clock; Gbps 10/100/ 1000
FIFO
Data Mover
10/100/ 1000
10/100/ 1000
GPIO/ Interrupt/ PCMCIA Generic Flash
Gbps
GMII 8b/16b FIFO
Gbps
BCM1255 device MIPS64 processor core-based system-on-achip (SOC) that offers industry-leading performance, high functional integration, low-power levels required next-generation computing, storage, networking applications. BCM1255 chip multiprocessor (CMP) system consisting Broadcom SB-1 high-performance MIPS64 CPUs, shared 512-KB cache, memory controller, integrated I/O. major blocks processor connected together ZBbus, high-speed, split-transaction multiprocessor bus. implements standard MESI protocol ensure coherency between CPUs, cache, agents, memory. Four Gigabit-Ethernet MACs (10/100/1000) enable easy interfacing LANs control backplanes. enable higher data rates cases where Ethernet protocol processing required), Gigabit-Ethernet MACs configured 8-bit and/or 16-bit packet FIFOs. BCM1255 also integrates 64-bit, 133-MHz PCI-X local direct connection devices. Four serial ports available UARTs console ports. enable low-chip count systems, BCM1255 also includes configurable generic that allows glueless connection boot flash memory simple peripherals. On-chip debug, trace, performance monitoring functions assist both hardware software designers debugging tuning system. system either big-endian little-endian mode.
Implementation MIPS64 SB-1 core high-performance implementation standard MIPS64 that incorporates MIPS-3D MIPS-MDMX application-specific extensions (ASEs). core supports 4-issue enhanced skew pipeline dispatch memory (integer, floating point, MDMX, MIPS-3D) instructions cycle.
Next Generation Broadband Processors
BCM1255 BCM1280 BCM1455 BCM1480 CPUs Cache DDR2 Support MACs GMII GMII GMII GMII PCI-X 64-bit 64-bit 64-bit 64-bit SPI-4/HT Ports
Broadcom®, pulse logo, Connecting everything® trademarks Broadcom Corporation and/ subsidiaries United States certain other countries. other trademarks mentioned property their respective owners.
BROADCOM CORPORATION 16215 Alton Parkway, P.O. 57013 Irvine, California 92619-7013
2004 BROADCOM CORPORATION. rights reserved. 1255-PB01-R 09/30/04
Phone: 949-450-8700 Fax: 949-450-8710 E-mail: info@broadcom.com Web: www.broadcom.com

DUAL-CORE 64-BIT MIPS® PROCESSOR (NEW!) FEATURES 64-bit MIPS® CPU

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