NLXT901APC.A4-831653 Cortina Systems Inc, NLXT901APC.A4-831653 Datasheet - Page 13

• Manufacturer Part Number: NLXT901APC.A4-831653
• Manufacturer: Cortina Systems Inc

Specifications of NLXT901APC.A4-831653

• Lead Free Status / RoHS Status: Not Compliant

2.2.1
2.2.2
Datasheet
Document #: 249097
Revision #: 002
Rev. Date: June 19, 2001
Figure 4. Jabber Control Function
Jabber Control Function
Figure 4
timer prevents the DTE from locking into a continuous transmit mode. When a transmission
exceeds the time limit, the watchdog timer disables the transmit and loopback functions, and
activates the JAB pin. Once the LXT901/907 is in the jabber state, the TXD circuit must remain
idle for a period of 250 to 750 ms before it will exit the jabber state.
SQE Function
In the integrated PLS/MAU mode, the LXT901/907 supports the signal quality error (SQE)
function, as shown in
network when SQE is enabled, the LXT901/907 transmits the SQE signal for 10BT ± 5BT over the
internal CI circuit which is indicated on the COL pin of the device. When using the 10BASE-2 port
of the LXT901/907, the SQE function is determined by the external MAU attached.
Unjab_ Timer_Done
DO=Idle
is a state diagram of the LXT901/907 Jabber control function. The on-chip watchdog
Start_XMIT_MAX_Timer
Nonjabber Output
Start_Unjab_Timer
LPBK=Disable
LPBK=Disable
XMIT=Disable
XMIT=Disable
Unjab Wait
No Output
Figure 5 on page
CI=SQE
CI=SQE
Jab
Power On
DO=Active
DO=Active*
XMIT_Max_Timer_Done
DO=Idle
DO=Active*
Unjab_Timer_Not_Done
Universal 10BASE-T and AUI Transceivers — LXT901/907
14. After every successful transmission on the 10BASE-T
13