參數(shù)資料
型號(hào)： AM79C973
廠商： Advanced Micro Devices, Inc.
英文描述： PCnet⑩-FAST III Single-Chip 10/100 Mbps PCI Ethernet Controller with Integrated PHY
中文描述： PCnet⑩快速三單芯片10/100 Mbps的PCI以太網(wǎng)控制器集成PHY
文件頁(yè)數(shù)： 271/304頁(yè)
文件大?。?/td> 2092K
代理商： AM79C973
第1頁(yè)第2頁(yè)第3頁(yè)第4頁(yè)第5頁(yè)第6頁(yè)第7頁(yè)第8頁(yè)第9頁(yè)第10頁(yè)第11頁(yè)第12頁(yè)第13頁(yè)第14頁(yè)第15頁(yè)第16頁(yè)第17頁(yè)第18頁(yè)第19頁(yè)第20頁(yè)第21頁(yè)第22頁(yè)第23頁(yè)第24頁(yè)第25頁(yè)第26頁(yè)第27頁(yè)第28頁(yè)第29頁(yè)第30頁(yè)第31頁(yè)第32頁(yè)第33頁(yè)第34頁(yè)第35頁(yè)第36頁(yè)第37頁(yè)第38頁(yè)第39頁(yè)第40頁(yè)第41頁(yè)第42頁(yè)第43頁(yè)第44頁(yè)第45頁(yè)第46頁(yè)第47頁(yè)第48頁(yè)第49頁(yè)第50頁(yè)第51頁(yè)第52頁(yè)第53頁(yè)第54頁(yè)第55頁(yè)第56頁(yè)第57頁(yè)第58頁(yè)第59頁(yè)第60頁(yè)第61頁(yè)第62頁(yè)第63頁(yè)第64頁(yè)第65頁(yè)第66頁(yè)第67頁(yè)第68頁(yè)第69頁(yè)第70頁(yè)第71頁(yè)第72頁(yè)第73頁(yè)第74頁(yè)第75頁(yè)第76頁(yè)第77頁(yè)第78頁(yè)第79頁(yè)第80頁(yè)第81頁(yè)第82頁(yè)第83頁(yè)第84頁(yè)第85頁(yè)第86頁(yè)第87頁(yè)第88頁(yè)第89頁(yè)第90頁(yè)第91頁(yè)第92頁(yè)第93頁(yè)第94頁(yè)第95頁(yè)第96頁(yè)第97頁(yè)第98頁(yè)第99頁(yè)第100頁(yè)第101頁(yè)第102頁(yè)第103頁(yè)第104頁(yè)第105頁(yè)第106頁(yè)第107頁(yè)第108頁(yè)第109頁(yè)第110頁(yè)第111頁(yè)第112頁(yè)第113頁(yè)第114頁(yè)第115頁(yè)第116頁(yè)第117頁(yè)第118頁(yè)第119頁(yè)第120頁(yè)第121頁(yè)第122頁(yè)第123頁(yè)第124頁(yè)第125頁(yè)第126頁(yè)第127頁(yè)第128頁(yè)第129頁(yè)第130頁(yè)第131頁(yè)第132頁(yè)第133頁(yè)第134頁(yè)第135頁(yè)第136頁(yè)第137頁(yè)第138頁(yè)第139頁(yè)第140頁(yè)第141頁(yè)第142頁(yè)第143頁(yè)第144頁(yè)第145頁(yè)第146頁(yè)第147頁(yè)第148頁(yè)第149頁(yè)第150頁(yè)第151頁(yè)第152頁(yè)第153頁(yè)第154頁(yè)第155頁(yè)第156頁(yè)第157頁(yè)第158頁(yè)第159頁(yè)第160頁(yè)第161頁(yè)第162頁(yè)第163頁(yè)第164頁(yè)第165頁(yè)第166頁(yè)第167頁(yè)第168頁(yè)第169頁(yè)第170頁(yè)第171頁(yè)第172頁(yè)第173頁(yè)第174頁(yè)第175頁(yè)第176頁(yè)第177頁(yè)第178頁(yè)第179頁(yè)第180頁(yè)第181頁(yè)第182頁(yè)第183頁(yè)第184頁(yè)第185頁(yè)第186頁(yè)第187頁(yè)第188頁(yè)第189頁(yè)第190頁(yè)第191頁(yè)第192頁(yè)第193頁(yè)第194頁(yè)第195頁(yè)第196頁(yè)第197頁(yè)第198頁(yè)第199頁(yè)第200頁(yè)第201頁(yè)第202頁(yè)第203頁(yè)第204頁(yè)第205頁(yè)第206頁(yè)第207頁(yè)第208頁(yè)第209頁(yè)第210頁(yè)第211頁(yè)第212頁(yè)第213頁(yè)第214頁(yè)第215頁(yè)第216頁(yè)第217頁(yè)第218頁(yè)第219頁(yè)第220頁(yè)第221頁(yè)第222頁(yè)第223頁(yè)第224頁(yè)第225頁(yè)第226頁(yè)第227頁(yè)第228頁(yè)第229頁(yè)第230頁(yè)第231頁(yè)第232頁(yè)第233頁(yè)第234頁(yè)第235頁(yè)第236頁(yè)第237頁(yè)第238頁(yè)第239頁(yè)第240頁(yè)第241頁(yè)第242頁(yè)第243頁(yè)第244頁(yè)第245頁(yè)第246頁(yè)第247頁(yè)第248頁(yè)第249頁(yè)第250頁(yè)第251頁(yè)第252頁(yè)第253頁(yè)第254頁(yè)第255頁(yè)第256頁(yè)第257頁(yè)第258頁(yè)第259頁(yè)第260頁(yè)第261頁(yè)第262頁(yè)第263頁(yè)第264頁(yè)第265頁(yè)第266頁(yè)第267頁(yè)第268頁(yè)第269頁(yè)第270頁(yè)當(dāng)前第271頁(yè)第272頁(yè)第273頁(yè)第274頁(yè)第275頁(yè)第276頁(yè)第277頁(yè)第278頁(yè)第279頁(yè)第280頁(yè)第281頁(yè)第282頁(yè)第283頁(yè)第284頁(yè)第285頁(yè)第286頁(yè)第287頁(yè)第288頁(yè)第289頁(yè)第290頁(yè)第291頁(yè)第292頁(yè)第293頁(yè)第294頁(yè)第295頁(yè)第296頁(yè)第297頁(yè)第298頁(yè)第299頁(yè)第300頁(yè)第301頁(yè)第302頁(yè)第303頁(yè)第304頁(yè)
Am79C973/Am79C975
271
P R E L I M I N A R Y
PHY by generating MII management frames. These
frames will be sent roughly every 900 ms. These
frames are necessary so that the Network Port Man-
ager can monitor the current active link and can select
a different network port if the current link goes down.
Auto-Negotiation
Through the external PHY, the following capabilities are
possible: 100BASE-T4, 100BASE-TX Full-/Half-Du-
plex, and 10BASE-T Full-/Half-Duplex. The capabilities
are then sent to a link partner that will also send its ca-
pabilities. Both sides look to see what is possible and
then they will connect at the greatest possible speed
and capability as defined in the IEEE 802.3u standard
and according to Table C-68.
By default, the link partner must be at least 10BASE-T
half-duplex capable. The Am79C973/Am79C975 con-
troller can automatically negotiate with the network and
yield the highest performance possible without soft-
ware support. See the section on
Network Port Man-
ager
for more details.
Auto-Negotiation goes further by providing a message-
based communication scheme called,
Next Pages
, be-
fore connecting to the Link Partner.
This feature is not
supported in Am79C973/Am79C975 unless the
DANAS (BCR32, bit 10) is selected and the software
driver is capable of controlling the external PHY.
A com-
plete bit description of the MII and Auto-Negotiation
registers can be found in the
MII Management Regis-
ters
section.
Automatic Network Port Selection
If ASEL (BCR2, bit 0) is set to 1 and DANAS (BCR 32,
bit 7) is set to 0, then the Network Port Manager will
start to configure the external PHY if it detects the ex-
ternal PHY on the MII Interface.
Automatic Network Selection: Exceptions
If ASEL (BCR2, bit 0) is set to 0 or DANAS (BCR 32, bit
7) is set to 1, then the Network Port Manager will dis-
continue actively trying to establish the connections. It
is assumed that the software driver is attempting to
configure the network port and the Am79C973/
Am79C975 controller will always defer to the software
driver. When The ASEL is set to 0, the software driver
should then configure the ports with PORTSEL
(CSR15, bits 7-8).
Note:
It is highly recommended that ASEL and
PORTSEL be used when trying to manually configure
a specific network port.
In order to manually configure the External PHY, the
recommended procedure
is to force the PHY config-
urations when Auto-Negotiation is
not
enabled. Set the
DANAS bit (BCR32, bit 7) to turn off the Network Port
Manager. Then clear the XPHYANE (BCR32, bit 5) and
set either XPHYFD (BCR32, bit 4) or XPHYSP
(BCR32, bit 3) or both. The Network Port Manager will
send a few MII frames to the PHY to validate the con-
figuration.
CAUTION:
The Network Port Manager utilizes the
PHYADD (BCR33, bits 9-5) to communicate with the
external PHY during the automatic port selection pro-
cess. The PHYADD is copied into a shadow register
after the Am79C973/Am79C975 controller has read
the configuration information from the EEPROM. Ex-
treme care must be exercised by the host software not
to access BCR33 during this time. A read of PVALID
(BCR19, bit 15) before accessing BCR33 will guaran-
tee that the PHYADD has been shadowed.
Am79C973/Am79C975
’
s Automatic Network Port se-
lection mechanism falls within the following general
categories:
External PHY
Not
Auto-Negotiable
External PHY Auto-Negotiable
Automatic Network Selection: External PHY
Not
Auto-Negotiable
This case occurs when the MIIPD (BCR32, bit 14) bit is
1. This indicates that there is an external PHY attached
to Am79C973/Am79C975 controller
’
s MII. If more than
one external PHY is attached to the MII Management
Interface, then the DANAS (BCR32, bit 7) bit must be
set to 1 and then all configuration control should revert
to software. The Am79C973/Am79C975 controller will
read the register of the external PHY to determine its
status and network capabilities. See
the MII Manage-
ment Registers
section for the bit descriptions of the
MII Status register. If the external PHY is not Auto-Ne-
gotiation capable and/or the XPHYANE (BCR32, bit 5)
bit is set to 0, then the Network Port Manager will match
up the external PHY capabilities with the XPHYFD
(BCR 32, bit 4) and the XPHYSP (BCR32, bit 3) bits
programmed from the EEPROM. The Am79C973/
Am79C975 controller will then program the external
PHY with those values. A new read of the external
PHYs MII Status register will be made to see if the link
is up. If the link does not come up as programmed after
a specific time, the Am79C973/Am79C975 controller
will fail the external PHY link. The Network Port Man-
Table 68. Auto-Negotiation Capabilities
Network Speed
Physical Network Type
200 Mbps
100BASE-X, Full Duplex
100 Mbps
100BASE-T4, Half Duplex
100 Mbps
100BASE-X, Half Duplex
20 Mbps
10BASE-T, Full Duplex
10 Mbps
10BASE-T, Half Duplex
相關(guān)PDF資料
PDF描述
AM79C973KCW PCnet⑩-FAST III Single-Chip 10/100 Mbps PCI Ethernet Controller with Integrated PHY
AM79C975KCW PCnet⑩-FAST III Single-Chip 10/100 Mbps PCI Ethernet Controller with Integrated PHY
AM79C973VCW PCnet⑩-FAST III Single-Chip 10/100 Mbps PCI Ethernet Controller with Integrated PHY
AM79C975VCW PCnet⑩-FAST III Single-Chip 10/100 Mbps PCI Ethernet Controller with Integrated PHY
AM79C976 PCnet-PRO⑩ 10/100 Mbps PCI Ethernet Controller
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
AM79C973/75 制造商:未知廠家 制造商全稱(chēng):未知廠家 功能描述:Board Layout Considerations for the Am79C973/75 Network Interface? - (PDF)
AM79C973/AM79C975 制造商:AMD 制造商全稱(chēng):Advanced Micro Devices 功能描述:Am79C973/Am79C975 - PCnet-FAST III Single-Chip 10/100 Mbps PCI Ethernet Controller with Integrated PHY
AM79C973AVC\\W 制造商:Advanced Micro Devices 功能描述:
AM79C973AVC\W 制造商:Advanced Micro Devices 功能描述:
AM79C973BKC 制造商:Advanced Micro Devices 功能描述:79C973BKC
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(xiě)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

*
*
*