DS2149 Просмотр технического описания (PDF) - Maxim Integrated

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DS2149

5V T1/J1 Line Interface Unit

Maxim Integrated 

DS2149

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

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