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XRT86SH221 Datasheet(PDF) 4 Page - Exar Corporation

Part # XRT86SH221
Description  SDH-TO-PDH FRAMER/MAPPER WITH INTEGRATED 21-CHANNEL E1 SH LIU
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Manufacturer  EXAR [Exar Corporation]
Direct Link  http://www.exar.com
Logo EXAR - Exar Corporation

XRT86SH221 Datasheet(HTML) 4 Page - Exar Corporation

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XRT86SH221
I
SDH-TO-PDH FRAMER/MAPPER WITH INTEGRATED 21-CHANNEL E1 SH LIU
REV. 1.0.1
TABLE OF CONTENTS
GENERAL DESCRIPTION ................................................................................................ 1
FIGURE 1. SIMPLIFIED BLOCK DIAGRAM ............................................................................................................................................ 1
PACKAGE ORDERING INFORMATION ...................................................................................................... 1
FEATURES ........................................................................................................................ 2
TABLE OF CONTENTS...................................................................................................... I
1.0 PIN DESCRIPTIONS ................................................................................................................................ 4
1.1 MICROPROCESSOR INTERFACE PINS............................................................................................................ 4
1.2 BOUNDARY SCAN AND OTHER TEST PINS.................................................................................................... 6
1.3 GENERAL PURPOSE INPUT AND OUTPUT PINS............................................................................................ 7
1.4 TIMING AND CLOCK SIGNALS.......................................................................................................................... 7
1.5 LOW SPEED LINE INTERFACE SIGNALS ........................................................................................................ 9
1.6 HIGH SPEED SERIAL INTERFACE.................................................................................................................. 12
1.7 HIGH SPEED TELECOM BUS INTERFACE.................................................................................................... 13
1.8 HIGH SPEED SECTION AND PATH OVERHEAD BUS ................................................................................... 15
1.9 HIGH SPEED TU POH OVERHEAD BUS ......................................................................................................... 16
1.10 POWER AND GROUND PINS ......................................................................................................................... 18
2.0 APPLICATIONS AND PHYSICAL INTERFACE GENERAL OVERVIEW............................................. 20
FIGURE 2. APPLICATION DIAGRAM .................................................................................................................................................. 20
2.1 PHYSICAL INTERFACE .................................................................................................................................... 21
FIGURE 3. SIMPLIFIED BLOCK DIAGRAM OF THE PHYSICAL INTERFACE ............................................................................................. 21
2.2 TELECOM BUS INTERFACE ............................................................................................................................ 22
FIGURE 4. SIMPLIFIED BLOCK DIAGRAM OF THE TELECOM BUS INTERFACE ...................................................................................... 22
2.3 STM-0 SERIAL INTERFACE SDH FRAME SYNCHRONIZATION AND TIMING INTERFACE....................... 23
FIGURE 5. SIMPLIFIED BLOCK DIAGRAM OF THE SERIAL PORT INTERFACE ....................................................................................... 23
2.4 SDH FRAME SYNCHRONIZATION AND TIMING INTERFACE ...................................................................... 24
FIGURE 6. SIMPLIFIED BLOCK DIAGRAM OF THE SDH FRAME SYNCHRONIZATION............................................................................. 24
2.5 SDH OVERHEAD ADD-DROP INTERFACES .................................................................................................. 25
FIGURE 7. SIMPLIFIED BLOCK DIAGRAM OF THE SDH OVERHEAD ADD-DROP INTERFACE................................................................. 25
2.6 E1 SHORT HAUL LINE INTERFACE ................................................................................................................ 26
2.7 E1 TIMING INTERFACE .................................................................................................................................... 27
2.8 MICROPROCESSOR INTERFACE ................................................................................................................... 27
3.0 FUNCTIONAL DESCRIPTION ............................................................................................................... 28
FIGURE 8. FUNCTIONAL BLOCK DIAGRAM........................................................................................................................................ 28
3.1 INGRESS DATA PATH FUNCTIONAL BLOCKS ............................................................................................. 29
FIGURE 9. SIMPLIFIED BLOCK DIAGRAM OF THE INGRESS DATA PATH.............................................................................................. 29
3.2 E1 RECEIVE LIU (RXE1LIU) ............................................................................................................................. 29
3.3 TRANSMIT LOW-ORDER (TU) OVERHEAD INSERTION BUS (TXTUPOH) .................................................. 29
3.4 VC-12/TU-12 TRANSMIT LOW-ORDER MAPPER AND OVERHEAD PROCESSOR (TXLOPOHPROC)...... 30
3.5 VC-12 TRANSMIT CROSS-CONNECT (TXVC12XC) ....................................................................................... 30
3.6 TRANSMIT SDH SOH/POH INSERTION BUS (TXOH) .................................................................................... 30
3.7 SDH TRANSMIT MAPPER AND PATH OVERHEAD PROCESSOR (TXPOHPROC) ..................................... 31
3.8 SDH TRANSMIT FRAMER AND SECTION OVERHEAD PROCESSOR (TXSOHPROC) ............................... 32
3.9 TRANSMIT TELECOM BUS (TXTBUS) ............................................................................................................ 33
3.10 EGRESS DATA PATH FUNCTIONAL BLOCKS ............................................................................................ 34
FIGURE 10. SIMPLIFIED BLOCK DIAGRAM OF THE EGRESS DATA PATH ............................................................................................ 34
3.11 RECEIVE TELECOM BUS (RXTBUS)............................................................................................................. 34
3.12 SDH RECEIVE FRAMER AND SECTION OVERHEAD PROCESSOR (RXSOHPROC) ............................... 35
3.13 SDH RECEIVE MAPPER AND PATH OVERHEAD PROCESSOR (RXPOHPROC) ..................................... 36
4.0 VOYAGER-LITE HARDWARE ARCHITECTURE AND ALGORITHMS ............................................... 37
FIGURE 11. VOYAGER-LITE ARCHITECTURE .................................................................................................................................... 37
4.1 MULTIPLEXING STRUCTURE.......................................................................................................................... 38
FIGURE 12. MULTIPLEXING STRUCTURE .......................................................................................................................................... 38
4.2 FUNCTIONAL BLOCKS .................................................................................................................................... 39
4.3 SDH TRANSMIT DATA FLOW .......................................................................................................................... 39
FIGURE 13. SDH TRANSMITTER GENERAL STRUCTURE................................................................................................................... 40
4.4 SDH RECEIVE DATA FLOW............................................................................................................................. 40
FIGURE 14. GENERAL COMPOSITION OF A SDH STM-N RECEIVER ................................................................................................. 41
4.5 VT MAPPER...................................................................................................................................................... 41


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