XRT91L80 Datasheet, PDF (5/41 Pages) Exar Corporation – 2.488/2.666GBPS OC-48/STM-16 SONET/SDH TRANSCEIVER

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REV. P1.0.4
PRELIMINARY
XRT91L80
2.488/2.666GBPS OC-48/STM-16 SONET/SDH TRANSCEIVER
FIGURE 16. PARALLEL REMOTE LOOPBACK .................................................................................................................................... 23
4.3 DIGITAL LOCAL LOOPBACK ....................................................................................................................... 24
FIGURE 17. DIGITAL LOOPBACK...................................................................................................................................................... 24
4.4 SONET JITTER REQUIREMENTS ................................................................................................................. 25
4.4.1 JITTER TOLERANCE: ................................................................................................................................................ 25
FIGURE 18. JITTER TOLERANCE MASK............................................................................................................................................ 25
FIGURE 19. MEASURED JITTER TOLERANCE WITH EXTERNAL JITTER ATTENUATION ENABLED IN LOOPTIMING. ..................................... 26
4.4.2 JITTER TRANSFER .................................................................................................................................................... 26
FIGURE 20. MEASURED JITTER TRANSFER WITH EXTERNAL JITTER ATTENUATION ENABLED IN LOOPTIMING. ....................................... 26
4.4.3 JITTER GENERATION................................................................................................................................................ 27
FIGURE 21. MEASURED PHASE NOISE TRANSMIT JITTER GENERATION AT 2.5 GBPS ......................................................................... 27
5.0 SERIAL MICROPROCESSOR INTERFACE BLOCK ......................................................................... 28
FIGURE 22. SIMPLIFIED BLOCK DIAGRAM OF THE SERIAL MICROPROCESSOR INTERFACE ................................................................. 28
5.1 SERIAL TIMING INFORMATION ................................................................................................................... 28
FIGURE 23. TIMING DIAGRAM FOR THE SERIAL MICROPROCESSOR INTERFACE ................................................................................ 28
5.2 16-BIT SERIAL DATA INPUT DESCRITPTION ............................................................................................. 29
5.2.1 R/W (SCLK1)............................................................................................................................................................... 29
5.2.2 A[5:0] (SCLK2 - SCLK7)............................................................................................................................................. 29
5.2.3 X (DUMMY BIT SCLK8) .............................................................................................................................................. 29
5.2.4 D[7:0] (SCLK9 - SCLK16)........................................................................................................................................... 29
5.3 8-BIT SERIAL DATA OUTPUT DESCRIPTION ............................................................................................. 29
6.0 REGISTER MAP AND BIT DESCRIPTIONS ....................................................................................... 30
TABLE 5: MICROPROCESSOR REGISTER MAP.................................................................................................................................. 30
TABLE 6: MICROPROCESSOR REGISTER 0X00H BIT DESCRIPTION ................................................................................................... 30
TABLE 7: MICROPROCESSOR REGISTER 0X01H BIT DESCRIPTION ................................................................................................... 31
TABLE 8: MICROPROCESSOR REGISTER 0X02H BIT DESCRIPTION ................................................................................................... 31
TABLE 9: MICROPROCESSOR REGISTER 0X03H BIT DESCRIPTION ................................................................................................... 32
TABLE 10: MICROPROCESSOR REGISTER 0X04H BIT DESCRIPTION ................................................................................................. 33
TABLE 11: MICROPROCESSOR REGISTER 0X05H BIT DESCRIPTION ................................................................................................. 34
TABLE 12: MICROPROCESSOR REGISTER 0X3EH BIT DESCRIPTION ................................................................................................. 35
TABLE 13: MICROPROCESSOR REGISTER 0X3FH BIT DESCRIPTION ................................................................................................. 36
7.0 ELECTRICAL CHARACTERISTICS ................................................................................................... 37
ABSOLUTE MAXIMUMS ................................................................................................................................. 37
DC ELECTRICAL CHARACTERISTICS.............................................................................................................. 37
ORDERING INFORMATION .................................................................................................................. 38
REVISION HISTORY ...................................................................................................................................... 39
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