參數(shù)資料
型號(hào)： DM9000AE
廠商： Electronic Theatre Controls, Inc.
英文描述： Ethernet Controller with General Processor Interface
中文描述： 以太網(wǎng)控制器與通用處理器接口
文件頁(yè)數(shù)： 43/56頁(yè)
文件大?。?/td> 1744K
代理商： DM9000AE
DM9000A
Ethernet Controller with General Processor Interface
Preliminary datasheet
Version: DM9000A-DS-P03
Apr. 21, 2005
43
9.6.8 Code Group Alignment
The Code Group Alignment block receives un-aligned
5B data from the descrambler and converts it into 5B
code group data. Code Group Alignment occurs after
the J/K is detected, and subsequent data is aligned
on a fixed boundary.
9.6.9 4B5B Decoder
The 4B5B Decoder functions as a look-up table that
translates incoming 5B code groups into 4B (Nibble)
data. When receiving a frame, the first 2 5-bit code
groups receive the start-of-frame delimiter (J/K
symbols). The J/K symbol pair is stripped and two
nibbles of preamble pattern are substituted. The last
two code groups are the end-of-frame delimiter (T/R
Symbols).
The T/R symbol pair is also stripped from the nibble,
presented to the Reconciliation layer.
9.7 10Base-T Operation
The 10Base-T transceiver is IEEE 802.3u compliant.
When the DM9000A is operating in 10Base-T mode,
the coding scheme is Manchester. Data processed
for transmit is presented in nibble format, converted
to a serial bit stream, then the Manchester encoded.
When receiving, the bit stream, encoded by the
Manchester, is decoded and converted into nibble
format.
9.8 Collision Detection
For half-duplex operation, a collision is detected
when the transmit and receive channels are active
simultaneously. Collision detection is disabled in full
duplex operation.
9.9 Carrier Sense
Carrier Sense (CRS) is asserted in half-duplex
operation during transmission or reception of data.
During full-duplex mode, CRS is asserted only during
receive operations.
9.10 Auto-Negotiation
The objective of Auto-negotiation is to provide a
means to exchange information between linked
devices and to automatically configure both devices
to take maximum advantage of their abilities. It is
important to note that Auto-negotiation does not test
the characteristics of the linked segment. The
Auto-Negotiation function provides a means for a
device to advertise supported modes of operation to
a remote link partner, acknowledge the receipt and
understanding of common modes of operation, and to
reject un-shared modes of operation. This allows
devices on both ends of a segment to establish a link
at the best common mode of operation. If more than
one common mode exists between the two devices, a
mechanism is provided to allow the devices to
resolve to a single mode of operation using a
predetermined priority resolution function.
Auto-negotiation also provides a parallel detection
function for devices that do not support the
Auto-negotiation feature. During Parallel detection
there is no exchange of information of configuration.
Instead, the receive signal is examined. If it is
discovered that the signal matches a technology,
which the receiving device supports, a connection will
be automatically established using that technology.
This allows devices not to support Auto-negotiation
but support a common mode of operation to establish
a link.
相關(guān)PDF資料
PDF描述
DM9000AEP Ethernet Controller with General Processor Interface
DM9000 ISA TO ETHERNET MAC CONTROLLER WITH INTEGRATED 10/100 PHY
DM9000E ISA TO ETHERNET MAC CONTROLLER WITH INTEGRATED 10/100 PHY
DM9006CJ Gate Expander
DM9006CN Gate Expander
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
DM9000AEP 制造商:未知廠家 制造商全稱:未知廠家 功能描述:網(wǎng)絡(luò)接口電路
DM9000B 制造商:DAVICOM 制造商全稱:DAVICOM 功能描述:Ethernet Controller With General Processor Interface
DM9000B_12 制造商:DAVICOM 制造商全稱:DAVICOM 功能描述:Ethernet Controller With General Processor Interface
DM9000BE 制造商:DAVICOM 制造商全稱:DAVICOM 功能描述:Ethernet Controller with General Processor Interface
DM9000BEP 制造商:DAVICOM 功能描述:IC ENET CNTRL 10/100M PHY 48LQFP 制造商:DAVICOM 功能描述:IC, ENET CNTRL, 10/100M PHY, 48LQFP 制造商:DAVICOM 功能描述:IC, ENET CNTRL, 10/100M PHY, 48LQFP; Data Rate:100Mbps; Ethernet Type:IEEE 802.3u; Supply Voltage Min:3.135V; Supply Voltage Max:3.465V; Digital IC Case Style:LQFP; No. of Pins:48; Interface Type:MII; Operating Temperature Min:0C; ;RoHS Compliant: Yes
發(fā)布緊急采購(gòu)，3分鐘左右您將得到回復(fù)。

采購(gòu)需求

(若只采購(gòu)一條型號(hào)，填寫一行即可)

發(fā)布成功！您可以繼續(xù)發(fā)布采購(gòu)。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

發(fā)布成功！您可以繼續(xù)發(fā)布采購(gòu)。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

*型號(hào) *數(shù)量 廠商 批號(hào) 封裝
添加更多采購(gòu)

我的聯(lián)系方式

*
*
*