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參數(shù)資料
| 型號(hào)： | LXT970ATC |
| 元件分類(lèi)： | 通信、網(wǎng)絡(luò)模塊及開(kāi)發(fā)工具 |
| 英文描述： | Telecomm/Datacomm |
| 中文描述： | 電信/數(shù)據(jù)通信 |
| 文件頁(yè)數(shù)： | 40/68頁(yè) |
| 文件大?。?/td> | 1177K |
| 代理商： | LXT970ATC |
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LXT9784
—
Low-Power Octal PHY
40
Datasheet
2.6
Hardware Control Interface
The LXT9784 can be configured for unmanaged applications, using external pins (hardware
control) as described in the following paragraphs.
2.6.1
MDI-X
(MDI Crossover)
During RESET, enables the auto-switch feature. If this feature was disabled, then after reset the
MDI-X pin controls the manual MDI/MDI-X switching.
When MDI-X = 1, the MDI port is forced to MDI-X
(cross- over mode).
When MDI-X = 0, the MDI port is forced to MDI
(straight-through mode).
2.6.2
FRCLNK
(Force Link)
During RESET:
When FRCLNK = 1, it
forces good link
(PHY reg17, bit 11),
link integrity
(PHY reg17, bit 1),
and
disables auto-negotiation
(PHY reg0, bit 12)
When FRCLNK = 0, Normal Operation.
If FRCLNK was set, then after reset the FRCLNK pin will control speed selection (PHY reg0, bit
13), where:
When FRCLNK = 1, it forces 100 Mbps.
When FRCLNK = 0, it forces 10 Mbps.
The FRCLNK pin and bit 11 in PHY register 11
’
h are ORed together.
2.6.3
FRC34
(Force 34 Transmit Pattern)
The FRC34 pin and bit 12 in PHY register 11
’
h are ORed together.
2.6.4
BP4B5B
(4B/5B Bypass)
To enter 4B/5B bypass mode, this pin must be set high after the end of reset. During reset, this pin
must be pulled down to ensure proper operation of the LXT9784.
5
Not used
6
TDN
_n
7
Not used
8
Not used
Table 15. Crossed-over Pin Assignments
Contact
MDI Signal
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| LXT971ABC | LAN TRANSCEIVER|SINGLE|CMOS|BGA|64PIN|PLASTIC |
| LXT971ABE | LAN TRANSCEIVER|SINGLE|CMOS|BGA|64PIN|PLASTIC |
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| LXT970QC | 制造商:LEVEL ONE 功能描述: 制造商:Level One 功能描述:LAN Transceiver, Single, 64 Pin, Plastic, QFP 制造商:Level One Communications 功能描述:LAN Transceiver, Single, 64 Pin, Plastic, QFP |
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| LXT971ALC | 制造商:Intel 功能描述:LAN Transceiver, Single, 64 Pin, Plastic, QFP 制造商:Intellon Corporation 功能描述:LAN Transceiver, Single, 64 Pin, Plastic, QFP 制造商:Level One 功能描述:LAN Transceiver, Single, 64 Pin, Plastic, QFP |
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