参数资料
型号: WJLXT905LE.C2
厂商: CORTINA SYSTEMS INC
元件分类: 网络接口
英文描述: DATACOM, ETHERNET TRANSCEIVER, PQFP32
封装: ROHS COMPLIANT, MO-136BC, LQFP-32
文件页数: 4/40页
文件大小: 544K
代理商: WJLXT905LE.C2
LXT905 Universal 10BASE-T Transceiver with 3.3V Support
12
Datasheet
Document Number: 249271
Revision Number: 004
Revision Date: 19-Oct-2005
2.4
Jabber Control Function
Figure 4 is a state diagram of the LXT905 jabber control function. The LXT905 on-chip Watch-
Dog Timer (WDT) prevents the DTE from locking into a continuous transmit mode. When a
transmission exceeds the time limit, the WDT disables the transmit and loopback functions and
activates the COL pin. Once the LXT905 is in the jabber state, the TXD circuit must remain idle
for a period of 0.25 to 0.75 seconds before it exits the jabber state.
Figure 4. Jabber Control Function
No Output
Nonjabber Output
Start_XMIT_MAX_Timer
Power On
DO=Active
Jab
XMIT=Disable
LPBK=Disable
CI=SQE
Unjab Wait
Start_Unjab_Timer
XMIT=Disable
LPBK=Disable
CI=SQE
DO=Active
XMIT_Max_Timer_Done
DO=Idle
Unjab_ Timer_Done
DO=Active
Unjab_Timer_Not_Done
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