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UPD720114 Datasheet(PDF) 23 Page - NEC |
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UPD720114 Datasheet(HTML) 23 Page - NEC |
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23 / 32 page  Data Sheet S17462EJ4V0DS 23 μPD720114 Timing Diagram Figure 2-11. Hub Differential Delay, Differential Jitter, and SOP Distortion C. Upstream Hub Delay with or without Cable D. Measurement Points 50% Point of Initial Swing 50% Point of Initial Swing Upstream End of Cable Upstream Port of Hub Downstream Port of Hub Downstream Port of Hub Downstream Port of Hub Upstream Port or End of Cable A. Downstream Hub Delay with Cable B. Downstream Hub Delay without Cable Hub Delay Downstream tHDD1 Hub Delay Upstream tHDD1 tHDD2 Crossover Point Crossover Point Crossover Point VSS Hub Differential Jitter: tHDJ1 = tHDDx(J) − tHDDx(K) or tHDDx(K) − tHDDx(J) Consecutive Transitions tHDJ2 = tHDDx(J) − tHDDx(J) or tHDDx(K) − tHDDx(K) Paired Transitions Bit after SOP Width Distortion (same as data jitter for SOP and next J transition): tFSOP = tHDDx(next J) − tHDDx(SOP) Low-speed timings are determined in the same way for: tLHDD, tLDHJ1, tLDJH2, tLUHJ1, tLUJH2, and tLSOP Host or Hub Hub Function Upstream end of cable Upstream port Downstream port Downstream signaling Upstream signaling Plug Receptacle Hub Delay Downstream tHDD2 VSS VSS VSS VSS VSS |
Similar Part No. - UPD720114 |
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Similar Description - UPD720114 |
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