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THGBMHG6C1LBAIL データシート(PDF) 23 Page - Toshiba Semiconductor |
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THGBMHG6C1LBAIL データシート(HTML) 23 Page - Toshiba Semiconductor |
23 / 33 page THGBMHG6C1LBAIL 23 Jul. 31th, 2015 HS200 Device Output Timing tPH parameter is defined to allow device output delay to be longer than tPERIOD. After initialization, the tPH may have random phase relation to the clock. The Host is responsible to find the optimal sampling point for the Device outputs, while switching to the HS200 mode. While setting the sampling point of data, a long term drift, which mainly depends on temperature drift, should be considered. The temperature drift is expressed by ΔTPH. Output valid data window (tVW) is available regardless of the drift (ΔTPH) but position of data window varies by the drift. NOTE VOH denotes VOH(min) and VOL denotes VOL(max). Symbol Min Max Unit Remark 1 tPH 0 2 UI Device output momentary phase from CLK input to CMD or DAT lines output. Does not include a long term temperature drift. Δ TPH -350 ( ΔT = -20 °C) +1550 ( ΔT = 90 °C ) ps Delay variation due to temperature change after tuning. Total allowable shift of output valid window (TVW) from last system Tuning procedure Δ TPH is 2600ps for ΔT from -25 °C to 125 °C during operation. tVW 0.575 UI tVW =2.88ns at 200MHz Using test circuit in following figure including skew among CMD and DAT lines created by the Device. Host path may add Signal Integrity induced noise, skews, etc. Expected tVW at Host input is larger than 0.475UI. NOTE Unit Interval (UI) is one bit nominal time. For example, UI=5ns at 200 MHz. VT tPERIOD VCCQ VSS CLOCK INPUT VOH VOL tVW CMD.DAT[7-0] OUTPUT VALID WINDOW tPH VOH VOL VCCQ VSS |
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