DS2149

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TABLE OF CONTENTS

1.

DETAILED DESCRIPTION................................................................................................. 4

2.

OPERATING MODES......................................................................................................... 5

3.

INITIALIZATION AND RESET............................................................................................ 9

4.

REGISTER DEFINITIONS .................................................................................................. 9

5.

TRANSMITTER................................................................................................................... 15

5.1

TRANSMIT DIGITAL DATA INTERFACE ................................................................................... 15

5.2

TRANSMIT MONITORING ...................................................................................................... 15

5.3

TRANSMIT IDLE MODE......................................................................................................... 15

5.4

TRANSMIT PULSE SHAPE .................................................................................................... 15

6.

RECEIVER.......................................................................................................................... 15

6.1

RECEIVE EQUALIZER .......................................................................................................... 15

6.2

RECEIVE DATA RECOVERY.................................................................................................. 15

6.3

RECEIVE DIGITAL-DATA INTERFACE ..................................................................................... 16

6.4

RECEIVE MONITOR MODE ................................................................................................... 16

7.

JITTER ATTENUATION ..................................................................................................... 16

8.

HARDWARE MODE ........................................................................................................... 16

9.

SOFTWARE MODE ............................................................................................................ 17

9.1

INTERRUPT HANDLING ........................................................................................................ 17

10.

DIAGNOSTIC MODE OPERATION.................................................................................... 19

10.1

LOOPBACK MODES............................................................................................................. 20

10.1.1 Local Loopback (LLB).................................................................................................................20

10.1.2 Analog Loopback (ALB)..............................................................................................................20

10.1.3 Remote Loopback (RLB) ............................................................................................................20

10.1.4 Network Loopback......................................................................................................................20

10.1.5 Dual Loopback ...........................................................................................................................20

10.2

INTERNAL PATTERN GENERATION AND DETECTION ............................................................... 21

10.2.1 Transmit Alarm-Indication Signal (TAIS).....................................................................................21

10.2.2 Quasirandom Signal Source (QRSS) .........................................................................................21

10.2.3 In-Band Network Loop-Up or Loop-Down Code Generator.........................................................22

10.3

ERROR INSERTION AND DETECTION ..................................................................................... 22

10.3.1 Bipolar Violation Insertion (INSBPV)...........................................................................................22

10.3.2 Logic Error Insertion (INSLE)......................................................................................................22

10.3.3 Logic Error Detection (QPD).......................................................................................................22

10.3.4 Bipolar Violation Detection (BPV) ...............................................................................................22

10.4

ALARM MONITORING........................................................................................................... 23

10.4.1 Receive-Carrier Loss (RCL) .......................................................................................................23

10.4.2 Alarm-Indication-Signal Detection (AIS)......................................................................................23

10.4.3 Driver-Fail Monitor-Open (DFMO) ..............................................................................................23

10.4.4 Jitter Attenuator Limit Trip (JALT) ...............................................................................................23

10.5

OTHER DIAGNOSTIC REPORTS ............................................................................................ 23

10.5.1 Receive Line-Attenuation Indication ...........................................................................................23

11.

NETWORK INTERFACE .................................................................................................... 24

12.

DC CHARACTERISTICS.................................................................................................... 28

13.

PACKAGE INFORMATION ................................................................................................ 32