BCM1122 Просмотр технического описания (PDF) - Broadcom Corporation

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BCM1122

ENTERPRISE IP PHONE CHIP

Broadcom Corporation 

BCM1122

®

HIGH-PERFORMANCE MIPS CONTROL PROCESSOR

FEATURES

• 400 MHz MIPS64™ CPU

• Quad-issue in order pipeline; dual execute, dual memory pipes

• Enhanced skew pipeline enables zero load-to-use penalty

• 32-KB instruction cache, 32-KB data cache

• Advanced branch predictors

• Fast, on-chip memory-coherent bus (ZBbus)

• Connects the CPU, L2 cache, memory controller and I/O

bridges

• Runs at half the CPU core clock; 256 bits wide

• On-chip L2 cache

• 128KB, shared by CPU and I/O bridges

• Four-way associative, ECC protected

• Ways can be removed to provide fast on-chip RAM

• DDR memory controller

• One channel with a 64-bit data bus plus ECC

• Runs at 100 MHz clock rate, 200 Mbps data rate

• Support for DDR SDRAM, SGRAM, and FCRAM

• High-speed packet interfaces

• One 10/100/1000 Ethernet MAC, and one 10/100 Ethernet

MAC

• 802.3 compliant with option to configure MAC into packet

FIFO

• PCI interface

• 32-bit, 33/66 MHz PCI 2.2

• Host bridge or target device

• Integrated system I/O

• Generic I/O for direct connect to boot ROM, FLASH, fast

peripherals/ASICs

• SMBus serial configuration interface

• PCMCIA control interface

• Two serial interfaces

• Extensive, on-chip debug features

• 4W @ 400 MHz

• Software-compatible with BCM1250 and BCM1125H

• Support for leading operating systems including VxWorks®,

Linux®, NetBSD, QNX and OSE

• Evaluation board platform available with tools, firmware and

software drivers

SUMMARY OF BENEFITS

• Industry-leading performance

• 2.2 Dhrystone MIPS/MHz

• 51-Gbps on-chip bus bandwidth, 13-Gbps memory bandwidth

• Low power dissipation at 4W

• High functional integration

• Programming ease and flexibility based on MIPS64 ISA

• Scalable system architecture

• Broad tools and system software support

• Software-compatible with BCM1250 and BCM1125H

APPLICATIONS

• The BCM1122's world-class performance, power efficiency and

integration makes these processors ideal for a broad variety of

systems including:

• Networking: routers, switches

• Control plane processing

• Line cards

• Broadband access: DSLAM, CMTS, BRAS

• Wireless base stations

• Storage: RAID controllers, NAS controllers, HBAs

• Web/networking/caching appliances

• Imaging: printers, copiers

FLASH

10/100 Ethernet

Port for Debug BCM5461

PHY

MII

GMII

Data Plane

ASIC or NPU

GenBus

BCM1122

PCI

DDR

SDRAM

Host

Example: PCI Card for TCP/IP Acceleration

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