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參數(shù)資料
| 型號： | LXT914QE |
| 英文描述： | LAN Transceiver |
| 中文描述： | 網(wǎng)絡收發(fā)器 |
| 文件頁數(shù)： | 23/42頁 |
| 文件大?。?/td> | 561K |
| 代理商： | LXT914QE |
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Flexible Quad Ethernet Repeater
—
LXT914
Datasheet
23
2.6
AUI Port Operation
2.6.1
AUI Reception
The LXT914 AUI port receiver acquires data packets from the network (AUIDIP/AUIDIN). Only
valid data streams above the squelch level activate the receive function. If the differential signal at
the DI circuit inputs falls below 75% of the threshold level (unsquelched) for 8 bit times (typical),
the AUI receiver enters the idle state.
2.6.2
AUI Transmission
The LXT914 AUI port receives NRZ data from the repeater core, and passes it through a
Manchester encoder. The encoded data then goes out on the network (AUIDOP/AUIDON).
2.6.3
AUI Mode Selection (DTE/MAU)
The LXT914 allows the user to change the mode of the AUI from a DTE to a MAU interface. This
option is available on both 68- and 100-pin versions except as follows:
When using the LEDJM/AUISEL pin to select the AUI interface mode the following is true:
After reset the state of the LEDJM/AUISEL pin is sensed for the correct mode. The LEDJM/
AUISEL pin when floated or pulled Low will select the DTE interface and the LEDJM/
AUISEL output is still available. When the LEDJM/AUISEL pin is pulled High the MAU
interface is selected and the LEDJM/AUISEL function is unavailable.
The 100-pin PQFP has an additional pin, AUISEL (pin 30). When using this pin to select the
AUI interface mode the LEDJM/AUISEL pin is still a functional LED driver. The AUISEL
pin is not latched after reset and is actively polled to determine which AUI interface mode is to
be used. Refer to
Table 13
.
Table 13. AUI Mode Selection (DTE/MAU)
App
#
AUISEL
(PQFP only
)
LEDJM/
AUISEL
(both pkgs)
AUI
Mode
Available
LED
Modes
1
Low
Low
DTE
default, 0-3
2
3
Low
High
MAU
1-3
High
Low
MAU
default, 0-3
4
High
High
MAU
1-3
Application 3 is valid only when using the 100-pin PQFP.
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相關代理商/技術參數(shù) |
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| LXT915 | 制造商:LVL1 制造商全稱:LVL1 功能描述:Simple Quad Ethernet Repeater |
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| LXT916 | 制造商:LVL1 制造商全稱:LVL1 功能描述:Multi-Port Hub Repeaters for Managed 10BASE-T Applications |
| LXT916QC | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:LAN Transceiver |
| LXT917 | 制造商:LVL1 制造商全稱:LVL1 功能描述:Multi-Port Hub Repeaters for Managed 10BASE-T Applications |
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