DS2155 datasheet(5/262 Pages) DALLAS

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DS2156

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23.3.2

Transmit Open-Circuit Detector.........................................................................................................151

23.3.3

Transmit BPV Error Insertion ............................................................................................................151

23.3.4

Transmit G.703 Synchronization Signal (E1 Mode)...........................................................................151

23.4

MCLK PRESCALER .................................................................................................................................152

23.5

JITTER ATTENUATOR...............................................................................................................................152

23.6

CMI (CODE MARK INVERSION) OPTION.................................................................................................152

FIGURE 23-2. CMI CODING ..................................................................................................................................152

23.7

LIU CONTROL REGISTERS ......................................................................................................................153

23.8

RECOMMENDED CIRCUITS.......................................................................................................................160

FIGURE 23-3. BASIC INTERFACE ...........................................................................................................................160

FIGURE 23-4. PROTECTED INTERFACE USING INTERNAL RECEIVE TERMINATION ..............................................161

23.9

COMPONENT SPECIFICATIONS.................................................................................................................162

TABLE 23-A. TRANSFORMER SPECIFICATIONS.....................................................................................................162

FIGURE 23-5. E1 TRANSMIT PULSE TEMPLATE ....................................................................................................163

FIGURE 23-6. T1 TRANSMIT PULSE TEMPLATE ....................................................................................................163

FIGURE 23-7. JITTER TOLERANCE.........................................................................................................................164

FIGURE 23-8. JITTER TOLERANCE (E1 MODE)......................................................................................................164

FIGURE 23-9. JITTER ATTENUATION (T1 MODE)..................................................................................................165

FIGURE 23-10. JITTER ATTENUATION (E1 MODE)................................................................................................165

FIGURE 23-11. OPTIONAL CRYSTAL CONNECTIONS .............................................................................................166

24.

UTOPIA BACKPLANE INTERFACE ...................................................................................................167

24.1

DESCRIPTION ...........................................................................................................................................167

24.1.1

List of Applicable Standards...............................................................................................................167

24.1.2

Acronyms and Definitions...................................................................................................................167

24.2

UTOPIA CLOCK MODES.........................................................................................................................168

FIGURE 24-1. UTOPIA CLOCKING CONFIGURATIONS .........................................................................................168

24.3

FULL T1/E1 MODE AND CLEAR-CHANNEL E1 MODE ............................................................................168

24.4

FRACTIONAL T1/E1 MODE ......................................................................................................................169

TABLE 24-A. UTOPIA CLOCK MODE CONFIGURATION ......................................................................................169

24.5

TRANSMIT OPERATION............................................................................................................................170

24.5.1

UTOPIA Side Transmit: Muxed Mode with One Transmit CLAV ......................................................170

FIGURE 24-2. POLLING PHASE AND SELECTION PHASE AT TRANSMIT INTERFACE..............................................171

FIGURE 24-3. END AND RESTART OF CELL AT TRANSMIT INTERFACE................................................................172

FIGURE 24-4. TRANSMISSION TO PHY PAUSED FOR THREE CYCLES...................................................................173

24.5.2

UTOPIA Side Transmit: Direct Status Mode (Multitransmit CLAV) .................................................173

FIGURE 24-5. EXAMPLE OF DIRECT STATUS INDICATION, TRANSMIT DIRECTION ..............................................174

24.5.3

Transmit Processing ...........................................................................................................................175

FIGURE 24-6. TRANSMIT CELL FLOW ...................................................................................................................175

24.6

RECEIVE OPERATION...............................................................................................................................176

24.6.1

Receive Processing .............................................................................................................................176

FIGURE 24-7. CELL-DELINEATION STATE DIAGRAM ...........................................................................................176

FIGURE 24-8. HEADER CORRECTION STATE MACHINE ........................................................................................177

24.6.2

UTOPIA Side Receive: Muxed Mode with One Receive CLAV ..........................................................178

FIGURE 24-9. POLLING PHASE AND SELECTION AT RECEIVE INTERFACE ............................................................178

FIGURE 24-10. END AND RESTART OF CELL TRANSMISSION AT RECEIVE INTERFACE ........................................179

24.6.3

UTOPIA Side Receive: Direct Status Mode (Multireceive CLAV) .....................................................179

FIGURE 24-11. EXAMPLE OF DIRECT STATUS INDICATION, RECEIVE DIRECTION ...............................................180

24.7

REGISTER DEFINITIONS ...........................................................................................................................181

24.8

RECEIVE FIFO OVERRUN........................................................................................................................192

24.9

UTOPIA DIAGNOSTIC LOOPBACK..........................................................................................................192

25.

PROGRAMMABLE IN-BAND LOOP CODE GENERATION AND DETECTION........................193

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