T1/E1 Short Haul Transceiver with Crystal-less Jitter Attenuation — LXT351
Contents
1.0
Pin Assignments and Signal Descriptions......................................................8
1.1 Mode Dependent Signals......................................................................................9
Functional Description...........................................................................................13
2.0
2.1
Initialization..........................................................................................................13
2.1.1 Reset Operation .....................................................................................13
Transmitter ..........................................................................................................13
2.2.1 Transmit Digital Data Interface...............................................................13
2.2.2 Transmit Monitoring................................................................................14
2.2.3 Transmit Drivers.....................................................................................14
2.2.4 Transmit Idle Mode.................................................................................14
2.2.5 Transmit Pulse Shape............................................................................14
Receiver ..............................................................................................................15
2.3.1 Receive Data Recovery..........................................................................15
Jitter Attenuation .................................................................................................15
Diagnostic Mode Operation.................................................................................16
2.5.1 Loopback Modes....................................................................................16
2.5.1.1 Local Loopback .........................................................................16
2.5.1.2 Analog Loopback.......................................................................18
2.5.1.3 Remote Loopback .....................................................................18
2.5.1.4 Dual Loopback ..........................................................................19
2.5.2 Internal Pattern Generation....................................................................19
2.5.2.1 Transmit All Ones......................................................................19
2.5.2.2 Quasi-Random Signal Source (QRSS) .....................................20
2.5.3 Error Insertion and Detection .................................................................21
2.5.3.1 Bipolar Violation Insertion (INSBPV).........................................21
2.5.3.2 Logic Error Insertion (INSLER)..................................................21
2.5.3.3 Bipolar Violation Detection (BPV)..............................................21
2.5.3.4 HDB3 Code Violation Detection (CODEV)................................21
2.5.3.5 HDB3 Zero Substitution Violation Detection (ZEROV)..............21
2.5.4 Alarm Condition Monitoring....................................................................22
2.5.4.1 Loss of Signal............................................................................22
2.5.4.2 Alarm Indication Signal Detection .............................................22
2.5.4.3 Driver Failure Open Mode.........................................................22
2.5.4.4 Elastic Store Overflow/Underflow..............................................22
2.5.4.5 Built-In Self Test........................................................................23
Parallel Microprocessor Interface........................................................................23
2.6.1 Interrupt Handling...................................................................................23
2.2
2.3
2.4
2.5
2.6
3.0
4.0
Register Definitions.................................................................................................24
Application Information.........................................................................................29
4.1
4.2
4.3
4.4
Transmit Return Loss..........................................................................................29
Transformer Data ................................................................................................29
Application Circuit................................................................................................29
Line Protection ....................................................................................................29
4.4.1 LXT351 Application Circuit.....................................................................31
Datasheet
3
INTEL [ INTEL ]
