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KM416RD8AS-RBM80 bảng dữ liệu(PDF) 53 Page - Samsung semiconductor |
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KM416RD8AS-RBM80 bảng dữ liệu(HTML) 53 Page - Samsung semiconductor |
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53 / 64 page  Page 50 KM416RD8AS Direct RDRAM™ Rev. 0.9July 1999 Target CMOS - Receive Timing Figure 56 is a timing diagram which shows the detailed requirements for the CMOS input signals . The CMD and SIO0 signals are inputs which receive infor- mation transmitted by a controller (or by another RDRAM’s SIO1 output. SCK is the CMOS clock signal driven by the controller. All signals are high true. The cycle time, high phase time, and low phase time of the SCK clock are tCYCLE1, tCH1 and tCL1, all measured at the 50% level. The rise and fall times of SCK, CMD, and SIO0 are tDR1 and tDF1, measured at the 20% and 80% levels. The CMD signal is sampled twice per tCYCLE1 interval, on the rising edge (odd data) and the falling edge (even data). The set/hold window of the sample points is tS1/tH1. The SCK and CMD timing points are measured at the 50% level. The SIO0 signal is sampled once per tCYCLE1 interval on the falling edge. The set/hold window of the sample points is tS2/tH2. The SCK and SIO0 timing points are measured at the 50% level. Figure 56: CMOS Timing - Data Signals for Receive VIH,CMOS 50% VIL,CMOS 80% 20% SCK tS1 CMD tDR2 tH1 tS1 tH1 even odd tDF2 VIH,CMOS 50% VIL,CMOS 80% 20% tDR2 tDF2 tCH1 tCL1 tCYCLE1 tS2 SIO0 tDR1 tH2 tDF1 VIH,CMOS 50% VIL,CMOS 80% 20% |
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