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DP83265

更新时间： 2024-01-25 06:01:50

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
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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

2.0 Architecture Description

The BSI device is composed of three interfaces and the

Map Engine.

The Control Bus Interface is separate from the BMAC de-

vice and ABus Interfaces to allow independent operation of

the Control Bus.

The three interfaces are the BMAC device, the ABus, and

the Control Bus. They are used to connect the BSI device to

the BMAC device, Host System, and external Control Bus.

The host uses the Control Bus to access the BSI device’s

internal registers, and to manage the attention/notify logic.

The Map Engine manages the operation of the BSI device.

2.2 DATA STRUCTURES

2.2.1 Data Types

2.1 INTERFACES

The BSI device connects to external components via three

interfaces: the BMAC device Interface, the ABus Interface,

and the Control Bus Interface (see Figure 2-1).

The architecture of the BSI device defines two basic kinds

of objects: Data Units and Descriptors. A Data Unit is a

group of contiguous bytes which forms all or part of a frame

(Service Data Unit). A Descriptor is a two-word (64-bit) con-

trol object that provides addressing information and control/

status information about BSI device operations.

2.1.1 BMAC Device Interface

The BSI device connects to the BMAC device via the

MA Indicate (receive) and MA Request (transmit) Inter-

faces, as shown in Figure 2-1.

Data and Descriptor objects may consist of one or more

parts, where each part is contiguous and wholly contained

within a 1k or 4k memory page. A single-part object consists

of one Only Part; a multiple-part object consists of one First

Part, zero or more Middle Parts, and one Last Part. In De-

scriptor names, the object part is denoted in a suffix, pre-

ceded by a dot. Thus an Input Data Unit Descriptor (IDUD),

which describes the last Data Unit of a frame received from

the ring, is called an IDUD.Last.

Received Data is transferred from the BMAC device to

the BSI device via the MA Indicate Interface. The

MA Indicate Interface consists of a parity bit (odd parity)

and byte-wide data along with flag and control signals.

Transmit Data is transferred from the BSI device to

the BMAC device via the MA Request Interface. The

MA Request Interface consists of a parity bit (odd parity)

and byte-wide data along with flag and control signals.

A single-part Data Unit is stored in contiguous locations

within a single 4k byte page in memory. Multiple-part Data

Units are stored in separate, and not necessarily contiguous

4k byte pages. Descriptors are stored in contiguous loca-

tions in Queues and Lists, where each Queue or List occu-

pies a single 1k byte or 4k byte memory page, aligned on

the queue-size boundary. For both Queues and Lists, an

access to the next location after the end of a page will auto-

matically wrap-around and access the first location in the

page.

2.1.2 ABus Interface

The BSI device connects to the Host System via the ABus

Interface. The ABus Interface consists of four bits of parity

(odd parity) and 32 bits of multiplexed address and data

along with transfer control and bus arbitration signals.

2.1.3 Control Bus Interface

The Control Bus Interface connects the BSI device to the

external Control Bus.

TL/F/10791–2

FIGURE 2-1. BSI Device Interfaces

1 2 345 6 7...76

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DP83265BSI	NSC	BSI⑩ Device (FDDI System Interface)	获取价格
DP83265VF	NSC	IC SPECIALTY TELECOM CIRCUIT, PQFP160, PLASTIC, QFP-160, Telecom IC:Other	获取价格
DP83266	NSC	MACSITM Device (FDDI Media Access Controller and System Interface)	获取价格
DP83266VF	NSC	MACSITM Device (FDDI Media Access Controller and System Interface)	获取价格

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