參數(shù)資料
型號： LXT9883HC
英文描述： LAN HUB CONTROLLER
中文描述： 局域網(wǎng)集線器控制器
文件頁數(shù)： 3/96頁
文件大?。?/td> 1309K
代理商： LXT9883HC
Datasheet
3
LXT980/980A Dual-Speed, 5-Port Fast Ethernet Repeater
Contents
1.0
2.0
Pin Assignments and Signal Descriptions
....................................................10
Functional Description
...........................................................................................20
2.1
Introduction..........................................................................................................20
2.1.1
TP/FX Port Configuration .......................................................................24
2.1.2
MII Port Configuration ............................................................................25
2.1.3
Interface Descriptions.............................................................................25
2.1.4
Repeater Operation................................................................................27
2.1.5
Management Support.............................................................................29
2.1.6
LED Drivers............................................................................................30
2.2
Requirements......................................................................................................30
2.2.1
Power .....................................................................................................30
2.2.2
Clock ......................................................................................................30
2.2.3
Bias Resistor..........................................................................................30
2.2.4
Reset......................................................................................................30
2.2.5
PROM.....................................................................................................30
2.2.6
Chip ID ...................................................................................................31
2.2.7
Management Master I/O Link.................................................................31
2.2.8
IRB Bus Pull-ups....................................................................................31
2.3
LED Operation.....................................................................................................31
2.3.1
Blink Rates.............................................................................................32
2.3.2
Power-Up and Reset Conditions............................................................32
2.3.3
Port LEDs...............................................................................................32
2.3.4
Segment LEDs.......................................................................................32
2.3.5
Global LEDs...........................................................................................33
2.4
IRB Operation......................................................................................................35
2.4.1
MAC IRB Access....................................................................................35
2.4.2
IRB Isolation...........................................................................................35
2.4.3
MMSTRIN, MMSTROUT........................................................................36
2.5
MII Port Operation...............................................................................................37
2.5.1
PHY Mode Operation .............................................................................38
2.5.2
MAC Mode Operation.............................................................................38
2.5.3
MII Port Timing Considerations..............................................................39
2.6
Serial Management I/F........................................................................................40
2.6.1
Serial Clock............................................................................................41
2.6.2
Serial Data I/O........................................................................................41
2.6.3
Read and Write Operations....................................................................41
2.6.4
Interrupt Functions .................................................................................43
2.6.5
Address Arbitration.................................................................................44
2.7
Serial EEPROM Interface....................................................................................46
Application Information
.........................................................................................48
3.1
Design Recommendations..................................................................................48
3.1.1
General Design Guidelines ....................................................................48
3.1.2
Power Supply Filtering ...........................................................................48
3.1.3
Power and Ground Plane Layout Considerations..................................49
3.1.4
MII Terminations.....................................................................................49
3.0
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