參數(shù)資料
型號: ICS1893AFLF
廠商: IDT, Integrated Device Technology Inc
文件頁數(shù): 85/136頁
文件大?。?/td> 0K
描述: PHYCEIVER LOW PWR 3.3V 48-SSOP
標準包裝: 30
系列: PHYceiver™
類型: PHY 收發(fā)器
規(guī)程: MII
電源電壓: 3.14 V ~ 3.47 V
安裝類型: 表面貼裝
封裝/外殼: 48-BSSOP(0.295",7.50mm 寬)
供應(yīng)商設(shè)備封裝: 48-SSOP
包裝: 管件
其它名稱: 1893AFLF
800-2353-5
ICS1893AFLF-ND
ICS1893AF, Rev D 10/26/04
October, 2004
52
Chapter 7
Functional Blocks
ICS1893AF Data Sheet - Release
Copyright 2004, Integrated Circuit Systems, Inc.
All rights reserved.
7.6
Functional Block: Management Interface
As part of the MAC/Repeater Interface, the ICS1893AF provides a two-wire serial management interface
which complies with the ISO/IEC 8802-3 standard MII Serial Management Interface. This interface is used
to exchange control, status, and configuration information between a Station Management entity (STA) and
the physical layer device (PHY). The PHY and STA exchange this data through a pre-defined set of
management registers. The ISO/IEC standard specifies the following components of this serial
management interface:
The protocol
In compliance with the ISO/IEC specification, the ICS1893AF implementation of the serial management
interface provides a bi-directional data pin (MDIO) along with a clock (MDC) for synchronizing the
exchange of data. These pins remain active in all ICS1893AF MAC/Repeater Interface modes (that is, the
10/100 MII, 100M Symbol, and 10M Serial interface modes).
7.6.1
Management Register Set Summary
The ICS1893AF implements a Management Register set that adheres to the ISO/IEC standard. This
register set (discussed in detail in Chapter 8, “Management Register Set”) includes the mandatory ‘Basic’
Control and Status registers and the ISO/IEC ‘Extended’ registers as well as some ICS-specific registers.
7.6.2
Management Frame Structure
The Serial Management Interface is a synchronous, bi-directional, two-wire, serial interface for the
exchange of configuration, control, and status data between a PHY, such as an ICS1893AF, and an STA.
All data transferred on an MDIO signal is synchronized by its MDC signal. The PHY and STA exchange
data through a pre-defined register set.
The ICS1893AF complies with the ISO/IEC defined Management Frame Structure and protocol. This
structure supports both read and write operations. Table 7-2 summarizes the Management Frame
Structure.
Note:
The Management Frame Structure starts from and returns to an IDLE condition. However, the IDLE
periods are not part of the Management Frame Structure.
Table 7-2.
Management Frame Structure Summary
Frame Field
Data
Comment
Acronym
Frame Function
PRE
Preamble (Bit 1.6)
11..11
32 ones
SFD
Start of Frame
01
2 bits
OP
Operation Code
10/01 (read/write)
2 bits
PHYAD
PHY Address (Bits 16.10:6)
AAAAA
5 bits
REGAD
Register Address
RRRRR
5 bits
TA
Turnaround
Z0/10 (read/write)
2 bits
DATA
Data
DDD..DD
16 bits
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