Datasheet > DP83265

DP83265

更新时间： 2024-01-20 07:24:43

品牌	Logo	应用领域
其他 - ETC		电信集成电路
页数	文件大小	规格书
76页	536K
描述

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技术参数
数据手册

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DP83265 技术参数

是否Rohs认证：	不符合	生命周期：	Obsolete
包装说明：	QFP,	Reach Compliance Code：	unknown
HTS代码：	8542.39.00.01	风险等级：	5.86
JESD-30 代码：	S-PQFP-G160	JESD-609代码：	e0
长度：	28 mm	功能数量：	1
端子数量：	160	封装主体材料：	PLASTIC/EPOXY
封装代码：	QFP	封装形状：	SQUARE
封装形式：	FLATPACK	峰值回流温度（摄氏度）：	NOT SPECIFIED
认证状态：	Not Qualified	座面最大高度：	3.7 mm
标称供电电压：	5 V	表面贴装：	YES
电信集成电路类型：	TELECOM CIRCUIT	端子面层：	Tin/Lead (Sn/Pb)
端子形式：	GULL WING	端子节距：	0.65 mm
端子位置：	QUAD	处于峰值回流温度下的最长时间：	NOT SPECIFIED
宽度：	28 mm	Base Number Matches：	1

DP83265 数据手册

PRELIMINARY

February 1991

DP83265 BSI^TMDevice

(FDDI System Interface)

General Description

Features

32-bit wide Address/Data path with byte parity

The DP83265 BSI device implements an interface between

the National FDDI BMAC^TMdevice and a host system. It

provides a multi-frame, MAC-level interface to one or more

MAC Users.

Programmable transfer burst sizes of

words

4 or 8 32-bit

Interfaces to low-cost DRAMs or directly to system bus

2 Output and 3 Input Channels

The BSI device accepts MAC User requests to receive and

transmit multiple frames (Service Data Units). On reception

(Indicate), it receives the byte stream from the BMAC de-

vice, packs it into 32-bit words and writes it to memory. On

transmission (Request), it unpacks the 32-bit wide memory

data and sends it a byte at a time to the BMAC device. The

host software and the BSI device communicate via regis-

ters, descriptors, and an attention/notify scheme using clus-

tered interrupts.

Supports Header/Info splitting

Bridging support

Efficient data structures

Programmable Big or Little Endian alignment

Full Duplex data path allows transmission to self

Confirmation status batching services

Receive frame filtering services

Operates from 12.5 MHz to 25 MHz synchronously with

host system

TL/F/10791–1

FIGURE 1. FDDI Chip Set Block Diagram

TRI-STATEÉ is a registered trademark of National Semiconductor Corporation.

BSI^TM, BMAC^TM, CDD^TM, CRD^TMand PLAYER^TMare trademarks of National Semiconductor Corporation.

1995 National Semiconductor Corporation

TL/F/10791

RRD-B30M105/Printed in U. S. A.

12 3 4 5 6 7...76

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