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KM416RD8AS-RBM80 bảng dữ liệu(PDF) 51 Page - Samsung semiconductor |
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KM416RD8AS-RBM80 bảng dữ liệu(HTML) 51 Page - Samsung semiconductor |
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51 / 64 page ![]() Page 48 KM416RD8AS Direct RDRAM™ Rev. 0.9July 1999 Target RSL - Receive Timing Figure 54 is a timing diagram which shows the detailed requirements for the RSL input signals on the Channel. The DQA, DQB, ROW, and COL signals are inputs which receive information transmitted by a Direct RAC on the Channel. Each signal is sampled twice per tCYCLE interval. The set/hold window of the sample points is tS/tH. The sample points are centered at the 0% and 50% points of a cycle, measured relative to the crossing points of the falling CFM clock edge. The set and hold parameters are measured at the VREF voltage point of the input transition. The tDR and tDF rise- and fall-time parameters are measured at the 20% and 80% points of the input transition. Figure 54: RSL Timing - Data Signals for Receive VDIH VREF VDIL 80% 20% VCIH 50% VCIL 80% 20% CFM CFMN DQA tS ROW DQB tDF tDR tH tS tH 0.5•t CYCLE even odd COL VCM VX+ VX- |
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