BCM4780 Ver la hoja de datos (PDF) - Broadcom Corporation

Número de pieza

componentes Descripción

Fabricante

BCM4780

NASOC™ NETWORK ATTACHED STORAGE PROCESSOR

Broadcom Corporation 

OVERVIEW

BCM4780P Block Diagram

BCM4780

USB

Connectors

USB Device

Controller

Two-Port

USB Host

Controller

EJTAG

Mult/Acc

MIPS32

Core

Timer

Interrupt Ctrl

MMU

I-Cache

(16 KB)

Cache

Controller

+ 1 KB Prefetch Cache

Bus I/F

D-Cache

(16 KB)

PLL

Internal Bus

GPIO Port

Flash

External

Interface Bus

IDE

UART

Encryption/

Decryption Clock

10/100

MAC

LAN

48 MHz

Crystal

The Broadcom NASoC BCM4780P processor is a high-performance,

low-power chip designed for low and medium NAS products.

The BCM4780P has an advanced custom 400 DMIPS / 300 MHz

MIPS32™ core with a 2-way set associative 16 KB instruction cache, a

16 KB data cache, a 1 KB prefetch cache, and a 10/100 Ethernet MAC.

An integrated MMU with a 32-entry TLB allows support of multi-

threaded operating systems such as standard distribution Linux.

The BCM4780P provides simultaneous PCI 2.3 host interface,

expansion host interface, and USB 1.1 host/device interface operation

for adding application-specific peripherals - including Broadcom's

BCM4309 IEEE 802.11a/g dual-band processor, the BCM4306 IEEE

802.11g processor, the BCM4301 IEEE 802.11b processor, and an

external ATA/SATA controller.

The PCI 2.3 host interface allows enumeration of three external PCI

peripherals (or more, with an external arbiter) for platform expansion.

The external interface bus allows expansion of up to four devices without

external address decoding. The BCM4780P is capable of hosting two

USB 1.1 compliant devices (a two port hub is integrated), allowing

platform expansion by end users, and it can implement USB print server

functionality. In addition, the USB interface can be configured as a USB

device (instead of as a host) to support applications where the

BCM4780P-based system is added to legacy systems.

Broadcom®, the pulse logo, and Connecting everything® are trademarks of Broadcom Corporation and/

or its subsidiaries in the United States and certain other countries. All other trademarks mentioned are the

property of their respective owners.

®

BROADCOM CORPORATION

16215 Alton Parkway, P.O. Box 57013

Irvine, California 92619-7013

© 2003 by BROADCOM CORPORATION. All rights reserved.

4780P-PB00-R 11/3/03

Phone: 949-450-8700

Fax: 949-450-8710

E-mail: info@broadcom.com

Web: www.broadcom.com

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