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AT43USB325 Datasheet(PDF) 101 Page - ATMEL Corporation |
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AT43USB325 Datasheet(HTML) 101 Page - ATMEL Corporation |
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101 / 109 page  101 3355C–USB–4/05 AT43USB325 Table 9-10. Hub Timings, Full-speed Operation Symbol Parameter Condition Min Max Unit THDD2 Hub Differential Data Delay without cable 44 ns THDJ1 THDJ2 Hub Diff Driver Jitter to Next Transition for Paired Transitions -3 -1 3 1 ns TFSOP Data Bit Width Distortion after SOP -5 5 ns TFEOPD Hub EOP Delay Relative to THDD 0 15 ns TFHESK Hub EOP Output Width Skew -15 15 ns Table 9-11. Hub Timings, Low-speed Operation Symbol Parameter Condition Min Max Unit TLHDD Hub Differential Data Delay 300 ns TLHDJ1 TLHDJ2 TLUHJ1 TLUHJ2 Downstr Hub Diff Driver Jitter to Next Transition, downst for Paired Transitions, downst to Next Transition, upstr for Paired Transitions, upstr -45 -15 -45 -45 45 15 45 45 ns TSOP Data Bit Width Distortion after SOP -60 60 ns TLEOPD Hub EOP Delay Relative to THDD 0 200 ns TLHESK Hub EOP Output Width Skew -300 300 ns Table 9-12. Hub Event Timings Symbol Parameter Condition Min Max Unit TDCNN Time to detect a downstream port connect event 2.5 2000 µs TDDIS Time to detect a disconnect event on downstream port Awake Hub Suspended Hub 2.5 2.5 2000 12000 µs TURSM Time from detecting downstream resume to rebroadcast 100 µs TDRST Duration of driving reset to a downstream device Only for a SetPortFeature (PORT_RESET) request 10 20 µs TDSPDEV Time to evaluate device speed after reset 2.5 1000 µs TURLK Time to detect a long K from upstream 2.5 5.5 µs TURLSEO Time to detect a long SEO from upstream 2.5 5.5 µs TURPSEO Duration of repeating SEO upstream 23 FS bits TUDEOP Duration of sending SEO upstream after EOF1 2 FS bits |
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