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DP83265

更新时间： 2024-02-22 03:57:05

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 (Continued)

Data Units (MAC Service Data Units) are transferred be-

tween the BSI device and BMAC device via five simplex

Channels, three used for Indicate (receive) data and two for

Request (transmit) data. Parts of frames received from the

ring and copied to memory are called Input Data Units

(IDUs); parts of frames read from memory to be tansmitted

to the ring are called Output Data Units (ODUs).

Every Output Data Unit part is described by an Output Data

Unit Descriptor (ODUD). Output Data Unit Descriptors are

fetched from memory so that frame parts can be assembled

for transmission.

Every Input Data Unit part is described by an Input Data Unit

Descriptor (IDUD). Input Data Unit Descriptors are generat-

ed on Indicate Channels to describe where the BSI device

wrote each frame part and to report status for the frame.

Descriptors are transferred between the BSI device and

Host via the ABus, whose operation is for the most part

transparent to the user. There are five Descriptor types rec-

ognized by the BSI device: Input Data Unit Descriptors

(IDUDs), Output Data Unit Descriptors (ODUDs), Pool

Space Descriptors (PSPs), Request Descriptors (REQs),

and Confirmation Message Descriptors (CNFs).

Request Descriptors (REQs) are written by the user to spec-

ify the operational parameters for BSI device Request oper-

ations. Request Descriptors also contain the start address

of part of a stream of ODUDs and the number of frames

represented by the ODUD stream part (i.e., the number of

ODUD.Last descriptors). Typically, the user will define a sin-

gle Request Object consisting of multiple frames of the

same request and service class, frame control, and expect-

ed status.

Input and Output Data Unit Descriptors describe a single

Data Unit part, i.e., its address (page number and offset),

its size in bytes, and its part (Only, First, Middle, or

Last). Frames consisting of a single part are described by

Confirmation Messages (CNFs) are created by the BSI de-

vice to record the result of a Request operation.

Descriptor.Only; frames consisting of multiple parts

are described by a Descriptor.First, zero or more Descrip-

tor.Middles, and a Descriptor.Last.

Pool Space Descriptors (PSPs) describe the location and

size of a region of memory space available for writing Input

Data Units.

Request (transmit) and Indicate (receive) data structures

are summarized in Figures 2-2 and 2-3.

TL/F/10791–3

FIGURE 2-2. BSI Device Request Data Structures

1 2 3 456 7 8...76

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DP83265VF	NSC	IC SPECIALTY TELECOM CIRCUIT, PQFP160, PLASTIC, QFP-160, Telecom IC:Other	获取价格
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