参数资料
型号: WJLXT908LE.A4
厂商: INTEL CORP
元件分类: 网络接口
英文描述: DATACOM, ETHERNET TRANSCEIVER, PQFP64
封装: ROHS COMPLIANT, LQFP-64
文件页数: 9/46页
文件大小: 618K
代理商: WJLXT908LE.A4
Intel
LXT908 Universal 3.3 V 10BASE-T and AUI Transceiver
Datasheet
17
Document #: 249049
Revision #: 003
Rev. Date: 29-Oct-2005
Note:
For full-duplex operation, the collision detection circuitry must be disabled.
2.1.9
Link Pulse Transmission
The Intel LXT908 Universal 3.3 V 10BASE-T and AUI Transceiver transmits standard link
pulses which meet the 10BASE-T specifications. Figure 7 shows the link integrity pulse timing.
2.1.10
Link Integrity Test Function
Figure 8 on page 18 is a state diagram of the Intel LXT908 Universal 3.3 V 10BASE-T and AUI
Transceiver Link Integrity test function. The link integrity test is used to determine the status of the
receive side twisted-pair cable. Link integrity testing is enabled when pin 8 (LI) is tied High. When
enabled, the receiver recognizes link integrity pulses which are transmitted in the absence of
receive traffic.
Figure 6. Collision Detection Function
Idle
Power On
Collision
TPO=DO
DI=TPI
CI=SQE
Output
TPO=DO
DI=DO
Input
DI=TPI
DO=Active
TPI=Idle
XMIT=Enable
DO=Active
TPI=Active
XMIT=Enable
DO=Active
TPI=Active
XMIT=Enable
DO=Active
TPI=Idle
DO=Idle +
XMIT=Disable
DO=Idle
TPI=Idle
TPI=Active
A
Figure 7. Transmitted Link Integrity Pulse Timing
10-20 ms
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