|
TLK3132 Datasheet, PDF (58/103 Pages) Texas Instruments – 2-Channel Multi-Rate Transceiver | |||
|
◁ |
TLK3132
2-Channel Multi-Rate Transceiver
SLLS956 â DECEMBER 2008
www.ti.com
3.2 JITTER TEST PATTERN GENERATION AND VERIFICATION PROCEDURES
Use one of the following procedures to generate and verify the respective test patterns. It is assumed that
an appropriate external cable has been connected between serial outputs and serial inputs. No functional
parallel side connections are necessary.
⢠1000Base-X Based High/Mixed/Low Frequency Test Pattern:
â Device Pin Setting(s):
⢠Ensure CODE primary input pin is low.
â Reset Device
⢠Issue a hard or soft reset (RST_N asserted for at least 10 us -or- Write 1âb1 to 0.15)
â Select single ended or differential REFCLK input:
⢠If Single Ended REFCLK used â Write 2âb01 to 37120.15:14
⢠If Differential REFCLK used â Write 2âb00 to 37120.15:14
â Select SERDES TX Reference Clock Input:
⢠If Single Ended REFCLK used â Write 2âb10 to 37120.11:10
⢠If Differential REFCLK used â Write 2âb11 to 37120.11:10
â Select SERDES RX Reference Clock Input:
⢠If Single Ended REFCLK used â Write 2âb10 to 37120.9:8
⢠If Differential REFCLK used â Write 2âb11 to 37120.9:8
â Disable Comma Detection:
⢠Write 1âb0 to 17.7
â Ensure a legal reference clock operation frequency is selected based on Appendix A, and provision
control settings accordingly. It is also possible to use the Jitter Cleaner during these tests, and the
user should consult Appendix A for further Jitter Cleaner provisioning details.
â Issue Datapath Reset:
⢠Write 1âb1 to 16.11
⢠Write 1âb0, then 1âb1, followed by 1âb0 to 37636.14.
â Select Test Pattern:
⢠If High Frequency Pattern is desired:
â Write 3âb000 to 16.2:0
⢠If Low Frequency Pattern is desired:
â Write 3âb001 to 16.2:0
⢠If Mixed Frequency Pattern is desired:
â Write 3âb010 to 16.2:0
â Enable Test Pattern Generation:
⢠Write 1âb1 to 16.4
â Clear Counters:
⢠Read 22.15:0 and discard the value.
â Enable Test Pattern Verification:
⢠Write 1âb1 to 16.3
â Verify Test In Progress:
⢠Poll 21.1 asserted.
â The pattern verification is now in progress.
â Verify Error Free Operation (as many times as desired during the duration of the test period):
⢠Read 22.15:0, and verify 16âh0000 is read to confirm error free operation.
⢠1000Base-X Based Continuous Random Pattern (CRPAT) Long/Short Test Pattern:
â Device Pin Setting(s):
⢠Ensure CODE primary input pin is high.
58
Device Reset Requirements/Procedure
Submit Documentation Feedback
|
▷ |