BCM1125H
®
BCM1125H HIGH-PERFORMANCE MIPS PROCESSOR
FEATURES
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Highly integrated single core processor running at 400 MHz - 800 MHz
SB-1 MIPS64™ CPU
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Quad-issue in order pipeline; dual execute, dual memory pipes
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Enhanced skew pipeline enables zero load-to-use penalty
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32-KB instruction cache, 32-KB data cache
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Advanced branch predictors
Fast, on-chip memory-coherent bus (ZBbus)
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Connects the CPU, L2 cache, memory controller and I/O bridges
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Runs at half the CPU core clock; 256 bits wide
On-chip L2 cache
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256 KB, shared by CPU and I/O bridges
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Four-way associative, ECC protected
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Ways can be removed to provide fast on-chip RAM
DDR memory controller
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One channel with a 64-bit data bus plus ECC
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Runs up to 200 MHz clock rate, 400 Mbps data rate
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Support for DDR SDRAM, SGRAM, and FCRAM
High-speed packet interfaces
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Two 10/100/1000 Ethernet MACs; 802.3 compliant
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Option to configure MACs into packet FIFOs to enable OC-48 data
rates
PCI interface
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32-bit, 33/66 MHz PCI 2.2
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Host bridge or target device
HyperTransport™ I/O interface
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Complies with HyperTransport standard for high-speed I/O fabric
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600-MHz clock rate, 1.2 Gbps data rate
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Peak bandwidth of 19.2 Gbps on 8-bit link
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Supports double-ended fabrics (linking two BCM1125Hs
BCM1125H to BCM1250, BCM1280, or BCM1480)
SUMMARY OF BENEFITS
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Industry-leading performance
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2.5 DMIPS/MHz
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Processing speed of up to 4.3 Mpps*
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128-Gbps on-chip bus bandwidth, 25-Gbps memory bandwidth, 30-
Gbps total I/O bandwidth
Low power dissipation starting at less than 4W @ 400 MHz
High functional integration
Programming ease and flexibility based on MIPS64 ISA
Scalable system architecture
Broad tools and system software support
Software-compatible with BCM1250, BCM1255, BCM1280,
BCM1455, and BCM1480
*Based on internal Broadcom benchmark, using BCM112x for standard
IPv4 L3 look-up/switching.
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APPLICATIONS
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The BCM1125H's world-class performance, power efficiency and
integration makes these processors ideal for a broad variety of
systems including:
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Networking: routers, switches
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Control plane processing
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Line cards
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Broadband access: DSLAM, CMTS, BRAS
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Wireless base stations
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Storage: RAID controllers, NAS controllers, HBAs
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Web/networking/caching appliances
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Imaging: printers, copiers
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or
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Integrated system I/O
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Generic I/O for direct connect to boot ROM, FLASH, fast peripherals/
ASICs
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SMBus serial configuration interface
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PCMCIA control interface
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Two serial interfaces
Extensive, on-chip debug features
4W @ 400 MHz
FLASH
GenBus
BCM5461
Copper
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GMII
Software-compatible with BCM1250, BCM1255, BCM1280,
BCM1455, and BCM1480
Support for leading operating systems including VxWorks , Linux ,
NetBSD
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, OSE
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, QNX
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and Teja™ NP OS
Multiple evaluation board platforms available with tools, firmware and
software drivers
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BCM5461S
Fiber
DDR
SDRAM
BCM1125H
PCI
BCM5691
Gigabit Ethernet
Switch
Example: Gigabit Ethernet Control Panel
BOARDCOM [ Broadcom Corporation. ]
