參數(shù)資料
型號(hào)： ICS1893AFLFT
廠商： IDT, Integrated Device Technology Inc
文件頁數(shù)： 73/136頁
文件大?。?/td> 0K
描述： PHYCEIVER LOW PWR 3.3V 48-SSOP
標(biāo)準(zhǔn)包裝： 1,000
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： 帶卷 (TR)
其它名稱： 1893AFLFT
Chapter 7
Functional Blocks
ICS1893AF, Rev. D 10/26/04
October, 2004
41
ICS1893AF Data Sheet - Release
Copyright 2004, Integrated Circuit Systems, Inc.
All rights reserved.
7.3.3
PCS/PMA Transmit Modules
Both the PCS and PMA sublayers have Transmit modules.
7.3.3.1
PCS Transmit Module
The ICS1893AF PCS Transmit module accepts nibbles from the MAC/Repeater Interface and converts the
nibbles into 5-bit ‘code groups’ (referred to here as ‘symbols’). In addition, the PCS Transmit module
performs a parallel-to-serial conversion on the symbols, and subsequently passes the resulting serial bit
stream to the PMA sublayer.
The first 16 nibbles of each MAC/Repeater Frame represent the Frame Preamble. The PCS replaces the
first two nibbles of the Frame Preamble with the Start-of-Stream Delimiter (SSD), that is, the symbols /J/K/.
After receipt of the last Frame nibble, detected when TX_EN = FALSE, the PCS appends to the end of the
Frame an End-of-Stream Delimiter (ESD), that is, the symbols /T/R/. (The ICS1893AF PCS does not alter
any other data included within the Frame.)
The PCS Transmit module also performs collision detection. In compliance with the ISO/IEC specification,
when the transmission and reception of data occur simultaneously and the ICS1893AF is in:
Half-duplex mode, the ICS1893AF asserts the collision detection signal (COL).
Full-duplex mode, COL is always FALSE.
7.3.3.2
PMA Transmit Module
The ICS1893AF PMA Transmit module accepts a serial bit stream from its PCS and converts the data into
NRZI format. Subsequently, the PMA passes the NRZI bit stream to the Twisted-Pair Physical Medium
Dependent (TP-PMD) sublayer.
The ICS1893AF PMA Transmit module uses a digital PLL to synthesize a transmit clock from the Clock
Reference Interface. When the ICS1893AF is configured for an interface that is:
10M MII (that is, 10Base-T), the TXCLK signal is 2.5 MHz
10M Serial Interface, the TXCLK signal is 10 MHz
Either of the following, the TXCLK signal (a buffered version of the REF_IN signal) is 25 MHz:
– 100M MII (that is, 100Base-TX)
– 100M Symbol Interface
Note:
1.
All of the TXCLK signals are derived from the REF_IN signal that goes to the digital PLL.
2.
For the MII, for both the 10Base-T and 100Base-TX modes, the clock that is generated synchronizes
all data transfers across the MII.
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參數(shù)描述
ICS1893AFT 功能描述:PHYCEIVER LOW PWR 3.3V 48-SSOP RoHS:否 類別:集成電路 (IC) >> 接口 - 驅(qū)動(dòng)器，接收器，收發(fā)器 系列:PHYceiver™ 標(biāo)準(zhǔn)包裝:1,000 系列:- 類型:收發(fā)器 驅(qū)動(dòng)器/接收器數(shù):2/2 規(guī)程:RS232 電源電壓:3 V ~ 5.5 V 安裝類型:表面貼裝 封裝/外殼:16-SOIC（0.295"，7.50mm 寬） 供應(yīng)商設(shè)備封裝:16-SOIC 包裝:帶卷 (TR)
ICS1893AG 制造商:ICS 制造商全稱:ICS 功能描述:3.3 V 10Base-T/100Base-TX Integrated PHYceiver-TM
ICS1893AGI 制造商:ICS 制造商全稱:ICS 功能描述:3.3 V 10Base-T/100Base-TX Integrated PHYceiver-TM
ICS1893AGILF 制造商:ICS 制造商全稱:ICS 功能描述:3.3 V 10Base-T/100Base-TX Integrated PHYceiver-TM
ICS1893AGLF 制造商:ICS 制造商全稱:ICS 功能描述:3.3 V 10Base-T/100Base-TX Integrated PHYceiver-TM
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