參數(shù)資料
型號： ICS1892Y
英文描述： 10Base-T/100Base-TX Integrated PHYceiver
文件頁數(shù)： 45/148頁
文件大小： 816K
代理商： ICS1892Y
Chapter 7
Functional Blocks
ICS1892, Rev. D, 2/26/01
February 26, 2001
45
ICS1892
2000-2001, Integrated Circuit Systems, Inc.
All rights reserved.
7.3.6
4B/5B Encoding/Decoding
The 4B/5B coding methodology maps each 4-bit nibble to a 5-bit symbol (also called a “code group”). There
are 32 five-bit symbols, which include the following:
Of the 32 five-bit symbols, 16 five-bit symbols are required to represent the 4-bit nibbles.
The remaining 16 five-bit symbols are available for control functions. The IEEE Standard defines 6
symbols for control, and the remaining 10 symbols of this grouping are invalid. The 6 control symbols
include the following:
– /H/ represents a Transmit Error
– /I/ represents an IDLE
– Two symbols represent the Start-of-Stream Delimiter (SSD): /J/ and /K/
– Two symbols represent the End-of-Stream Delimiter (ESD): /T/ and /R/
If the ICS1892 PCS receives:
– One of the 10 undefined symbols, it sets the QuickPoll Detailed Status Register’s Invalid Symbol bit
(bit 17.7) to logic one.
– A Halt symbol, it sets the Halt Symbol Detected bit in the QuickPoll Detailed Status Register (bit 17.6)
to logic one.
Note:
By an STA (1) setting the Extended Control Register’s Transmit Invalid Codes bit (bit 16.2) to logic
one and (2) asserting the TXER signal, an STA can force the ICS1892 to transmit symbols that are
typically classified as invalid. For more information, see
Section 8.11.7, “Invalid Error Code Test (bit
16.2)”
.
相關(guān)PDF資料
PDF描述
ICS1892Y-10 10Base-T/100Base-TX Integrated PHYceiver
ICS1892Y-14 10Base-T/100Base-TX Integrated PHYceiver
ICS1893AF 3.3V 10Base-T/100Base-TX Integrated PHYceiverTM
ICS1893Y-10 3.3V 10Base-T/100Base-TX Integrated PHYceiverTM
ICS1893 3.3-V 10Base-T/100Base-TX Integrated PHYceiver⑩
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
ICS1892Y-10 制造商:ICS 制造商全稱:ICS 功能描述:10Base-T/100Base-TX Integrated PHYceiver
ICS1892Y-14 制造商:ICS 制造商全稱:ICS 功能描述:10Base-T/100Base-TX Integrated PHYceiver
ICS1893 制造商:ICS 制造商全稱:ICS 功能描述:3.3-V 10Base-T/100Base-TX Integrated PHYceiver
ICS1893_09 制造商:ICS 制造商全稱:ICS 功能描述:3.3-V 10Base-T/100Base-TX Integrated PHYceiver?
ICS1893AF 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)
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