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BCM1250
PRODUCT
(R)
Brief
OF BENEFITS
BCM1250 HIGH-PERFORMANCE, INTEGRATED 64-BIT MULTIPROCESSOR
BCM1250 600 MHz-1 GHz FEATURES SUMMARY
* Two 64-bit MIPS CPUs, scalable from
* 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 * Connects the CPUs, L2 cache, memory controller and I/O bridges * Runs at half the CPU core frequency; 256 bits wide * 512 KB, shared by both CPUs * 4-way associative, ECC protected * Ways can be removed to provide fast on-chip RAM * Two channels, each with a 64-bit data bus plus optional ECC * Runs up to 200 MHz clock rate, 400 MHz data rate * Support for DDR SDRAM, SGRAM, and FCRAM * Three 10/100/1000 Ethernet MACs; 802.3 compliant * Option to configure MACs into packet FIFOs * Up to two packet FIFOs each capable of OC-48 data rates * 32 bits, 33/66 MHz (PCI 2.2) * Host bridge or target device
TM
* Industry-leading performance
* Fast, on-chip multiprocessor bus * On-chip L2 cache
* Low power dissipation of 8-10W (@ 800 MHz) * High functional integration Programming * Instruction Setease and flexibility based on MIPS64 Architecture (ISA) Scalable multiprocessor chip and system architecture * * Broad tools and system software support For additional information on * evaluation boards, refer to the the BCM1250and BCM91250A
BCM91250E product briefs
*Based on internal Broadcom benchmark, using BCM1250 for standard IPv4 L3 look-up/switching.
* Processing speed of up to 10 Mpps* * 128 Gbps on-chip bus bandwidth; 50 Gbps memory bandwidth, 30 Gbps total I/O bandwidth
* DDR memory controller
TARGET
APPLICATIONS
* High-speed packet interfaces * PCI interface
Due to the BCM1250's world-class performance, power efficiency and integration, the processor is ideal for a broad variety of applications including:
* Enterprise workgroup and backbone switches * VPN switches/routers * Multiservice access concentrators * SAN routers/gateway/switches * IP services/subscriber management platforms * Web-server switches * High-end firewall/intrusion detection devices * Wireless basestations
* HyperTransport
(formerly LDT) I/O interface
* Integrated system I/O
* Complies with HyperTransportTM standard for high-speed I/O fabric * 500-MHz clock rate, double data rate, for 600 MHz CPUs; 600-MHz clock rate for 800 MHz CPUs * Peak bandwidth of 9.6 Gbps in each direction @ 600 MHz * Supports double-ended fabrics (to link two BCM1250s) * Generic I/O for direct connect to boot ROM, flash * Two SMBus serial configuration interfaces * PCMCIA control interface * Two serial interfaces
Example: Packet Processing Blade
BCM5840 2,400 Mbps IPSec BCM5615 24-10/100 +2-Gigabit Ports
PCI
SMII
BCM5238 24 10/100 Ports BCM5238 BCM5238
SGMII 4 10/100 /1000 Ports
FPGA
HyperTransport
* Extensive, on-chip debug features * 8-10W power dissipation @ 800 MHz * Support for leading operating systems including VxWorks , Linux and NetBSD * Evaluation board platform available with tools,
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GMII
BCM5404
BCM5680 8-Port 10/100/1000 BASE-T Aggregation, L2/L3 Switching
BCM 1250 BCM 1250
DDR DRAM
GMII
DDR DRAM
firmware and software drivers
Deep Packet Look-up, L4-L7 Processing
BCM1250
OVERVIEW
BCM1250 Block Diagram
JTAG 55 Mbps Serial Interface Serial Interface Dual SMBus GPIO/ Interrupt/ PCMCIA
D M A D M A
Debug/ Bus Trace
SB-1 Core
SB-1 Core
512-KB L2 Cache
Data Mover DDR Memory Controller
256 Bits ZBbus Bus runs at 1/2 CPU clock @128 Gbps DMA 10/100/ 1000 MAC FIFO DMA 10/100/ 1000 MAC DMA 10/100/ 1000 MAC FIFO
16-50 Gbps
55 Mbps
I/O Bridge Generic Bus and Flash I/O
PCI/HT Bridge 32-Bit PCI HT Host Bridge
1 Gbps
3 x GMII / 2 x 16-bit FIFO @ 2 Gbps / @ 6 Gbps
2 Gbps 19.2 Gbps
Broadcom's first SiByteTM processor, the BCM1250, is a stateof-the-art multiprocessor solution targeted at the fast-growing networking and communications markets. The BCM1250 is the first MIPS64TM processor to offer the industry-leading performance, high functional integration, and low power levels required by next-generation networking applications. The BCM1250 is an intelligent on-chip multiprocessor system (CMP) consisting of two Broadcom SB-1 high performance MIPS64TM CPUs, a shared 512-KB L2 cache, a DDR memory controller, and integrated I/O. All major blocks of the processor are connected together via the ZBbus, a high-speed, splittransaction multiprocessor bus. The bus implements the standard MESI protocol to ensure coherency between the two CPUs, L2 cache, I/O agents, and memory. Three Gigabit Ethernet MACs (10/100/1000) enable easy interfacing to LANs. To enable higher data rates, or in cases where Ethernet protocol processing is not required, the MACs can be configured as either three 8-bit or two 16-bit packet FIFOs. The high-speed I/O is provided using
HyperTransportTM (HT) I/O fabric and a 32-bit PCI (rev 2.2) local bus. Two serial ports are available to use as UARTs for console ports or asynchronous interface for WAN connections at up to T3/OC-1 rates (55 Mbps). To enable low chip-count systems, the BCM1250 also includes a configurable generic bus that allows glueless connection of a boot ROM or flash memory and simple I/O peripherals. On-chip debug, trace, and performance monitoring functions assist both hardware and software designers in debugging and tuning the system. The system can be run in either big- or little-endian mode. The BCM1250 is manufactured in TSMC's 0.13 process and is available in an 860 BGA package. Implementation of MIPS64TM ISA The SB-1 CPU core is a high-performance implementation of the standard MIPS64TM instruction set architecture (ISA), and incorporates the MIPS-3D and MIPS-MDMX application specific extensions (ASEs). The core supports a four-issue enhanced skew pipeline and can dispatch up to two memory and two ALU (Integer, Floating Point, MDMX or MIPS-3D) instructions per cycle.
Broadcom(R), the pulse logo, Connecting Everything(R), SiByteTM and System I/OTM are trademarks of Broadcom Corporation and/or its affiliates in the United States and certain other countries. All other trademarks mentioned are the property of their respective owners.
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BROADCOM CORPORATION 16215 Alton Parkway, P.O. Box 57013 Irvine, California 92619-7013
(c) 2003 by BROADCOM CORPORATION. All rights reserved. 1250-PB09-R 06.13.03
Phone: 949-450-8700 FAX: 949-450-8710 Email: info@broadcom.com Web: www.broadcom.com

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