參數(shù)資料
型號(hào)： GT-48002A
廠商： Galileo Technology Services, LLC
英文描述： Switched Fast Ethernet Controller for 100BaseX(100BaseX交換式快速以太網(wǎng)控制器)
中文描述： 交換式快速以太網(wǎng)控制器（100BaseX交換式快速以太網(wǎng)控制器的100BaseX）
文件頁(yè)數(shù)： 47/102頁(yè)
文件大?。?/td> 1001K
代理商： GT-48002A
Switched Fast Ethernet Controller
Revision 1.2
49
and 2 alternately), implemented as READ commands issued via the MDC/MDIO interface:
1.
Read the PHY Auto-Negotiation Complete status. As long as PHY bit 1.5 (Register 1, bit 5) is '0' switch to Half-
Duplex mode and continue to read PHY register bit 1.5. Continue to step 2 when PHY bit 1.5 is '1', signaling Auto-
negotiation is complete.
Steps 2 through 6 are performed once for every transition of PHY bit 1.5 from '0' to '1'. Once PHY bit 1.5 remains '1'
and PHY registers 4 and 5 have already been read, the GT-48002A will continue to read PHY register 1, and monitor
PHY bit 1.5. Steps 2 to 6 are performed once, if after Rst* de-assertion, the PHY bit 1.5 is read as '1', in order to update
the GT-48002A duplex mode.
NOTE: PHY bit 1.2 (Link Status) is read and latched during this same register read operation, regardless of the Auto-
Negotiation status.
2.
Read the Auto-Negotiation Advertisement register, PHY Register 4. Continue to step 3.
3.
Read the Auto-Negotiation Link Partner Ability register, PHY Register 5. Continue to step 4.
4.
Resolve the highest common ability of the two link partners in the following manner (according to the 802.3u Prior-
ity Resolution clause 28B.3):
if (bit 4.8 AND bit 5.8) == '1' then ability is 100BASE-TX Full Duplex
else if (bit 4.9 AND bit 5.9) == '1' then ability is 100BASE-T4 Half Duplex
else if (bit 4.7 AND bit 5.7) == '1' then ability is 100BASE-TX Half Duplex
else if (bit 4.6 AND bit 5.6) == '1' then ability is 10BASE-T Full Duplex
else ability is 10BASE-T Half Duplex;
Continue to step 5.
5.
Resolve the duplex mode of the two link partners in the following manner:
if ( (ability == "100BASE-TX Full Duplex") or (ability == "10BASE-T Full Duplex") ) then
duplex mode = FULL DUPLEX
else duplex mode = HALF DUPLEX;
NOTE: the value of the duplex mode indication should change only after reading both PHY registers 4 and 5. Continue
to step 6.
6.
Update the Port Control Register by writing the correct duplex mode bit. Continue with step 1.
12.3.3 Auto-negotiation Control Per Port
Since EnAutoNeg* pin enables or disables auto-negotiation for both ports, applications which require one port to auto-
negotiate and one port to be forced into a certain mode require an additional PLD to interface between the GT-
48002A’s MDIO and MDC pin and the PHY.
While the GT-48002A waits for auto-negotiation to complete on a port, it forces that particular port to half-duplex mode.
If this port is not auto-negotiation capable (but supports full duplex mode), or the port needs to be forced to full-duplex
while the other is left to auto-negotiate, the PLD will monitor the MDIO line and make some modifications to the data
read by GT-48002A from the PHYs. Therefore, instead of defaulting to half-duplex, the modified data read back by the
GT-48002A will place the port in full-duplex. In essence, the PLD mimics the completion of the auto-negotiation cycle
with a device that is not capable to auto-negotiate. For detailed information about implementing auto-negotiation on a
per port basis, including the required PLD equations, please download the application note located on Galileo’s web-
site (http://www.galileoT.com).
相關(guān)PDF資料
PDF描述
GT-48004A Four Port Switched Fast Ethernet Controller(四端口、交換式快速以太網(wǎng)控制器)
GT-48006A Low Cost Two Port 10/100Mbps Ethernet Bridge/Switch Controller(低成本、雙端口10/100Mbps以太網(wǎng)橋式/交換式控制器)
GT-48207 Advanced Switched Ethernet Controllers for 10+10/100 BaseX(高級(jí)交換式 10+10/100 BaseX以太網(wǎng)控制器)
GT-48208 Advanced Switched Ethernet Controllers for 10+10/100 BaseX(高級(jí)交換式 10+10/100 BaseX以太網(wǎng)控制器)
GT-48212 Advanced Switched Ethernet Controllers for 10+10/100 BaseX(高級(jí)交換式 10+10/100 BaseX以太網(wǎng)控制器)
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
GT482 制造商:CORNELL DUBILIER ELECTRONICS 功能描述:Cap Ceramic 82pF 3000V SL 5% (12 X 6mm) Radial 9.5mm 85°C
GT48212-A6-PBB1C000 制造商:Marvell 功能描述:
GT48212-A6-PBB-C000 制造商:Marvell 功能描述:12 PORT E + 2 PORT FE SWITCH (MANAGED) - Trays
GT48300-A1-BBE1C083 制造商:Marvell 功能描述:Marvell GT48300-A1-BBE1C083
GT48300-A1-BBE-C000 制造商:Marvell 功能描述:Marvell GT48300-A1-BBE-C000
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

*
*
*