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PDIUSBH11 データシート(PDF) 21 Page - NXP Semiconductors |
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PDIUSBH11 データシート(HTML) 21 Page - NXP Semiconductors |
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21 / 26 page  Philips Semiconductors Product specification PDIUSBH11 Universal Serial Bus Hub 1997 Aug 01 21 CROSSOVER POINT CROSSOVER POINT CROSSOVER POINT SV00514 CROSSOVER POINT Hub Delay Downstream THDD Hub Delay Upstream THDD DOWNSTREAM DIFFERENTIAL DATA UPSTREAM- DIFFERENTIAL DATA UPSTREAM DIFFERENTIAL DATA DOWNSTREAM- DIFFERENTIAL DATA VDD VSS VSS A. DOWNSTREAM HUB DELAY B. UPSTREAM HUB DELAY SOP DISTORTION TSOP = THDD(SOP) – THDD (NEXT J) LOW SPEED TIMINGS ARE DETERMINED IN THE SAME WAY FOR: TLHDD AND TLSOP Figure 2. Hub Differential Data Delay and SOP Distortion UPSTREAM- DIFFERENTIAL DATA DOWNSTREAM- DIFFERENTIAL DATA VDD VSS VSS A. DOWNSTREAM EOP DELAY B. UPSTREAM EOP DELAY EOP DELAY TEOPD = TEOP– EOP DELAY RELATIVE TO THDD TEOPDR = TEOPD – THDD EOP SKEW THESK = TEOP+ – TEOP– LOW SPEED TIMINGS ARE DETERMINED IN THE SAME WAY FOR: TLEOPD, TLEOPDR, AND TLHESK TEOP+ TEOP– CROSSOVER POINT EXTENDED CROSSOVER POINT EXTENDED UPSTREAM END OF CABLE DOWNSTREAM PORT TEOP+ TEOP– CROSSOVER POINT EXTENDED CROSSOVER POINT EXTENDED SV00515 Figure 3. Hub EOP Delay and EOP Skew |
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