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전자부품 데이터시트 검색엔진 |
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전자부품 데이터시트 검색엔진 |
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KM416RD8AS-RBM80 데이터시트(PDF) 52 Page - Samsung semiconductor |
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KM416RD8AS-RBM80 데이터시트(HTML) 52 Page - Samsung semiconductor |
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52 / 64 page  Page 49 KM416RD8AS Direct RDRAM™ Rev. 0.9 July 1999 Target RSL - Transmit Timing Figure 55 is a timing diagram which shows the detailed requirements for the RSL output signals on the Channel. The DQA and DQB signals are outputs to transmit informa- tion that is received by a Direct RAC on the Channel. Each signal is driven twice per tCYCLE interval. The beginning and end of the even transmit window is at the 75% point of the previous cycle and at the 25% point of the current cycle. The beginning and end of the odd transmit window is at the 25% point and at the 75% point of the current cycle. These transmit points are measured relative to the crossing points of the falling CTM clock edge. The size of the actual transmit window is less than the ideal tCYCLE/2, as indicated by the non-zero values of tQ,MIN and tQ,MAX. The tQ param- eters are measured at the VREF voltage point of the output transition. The tQR and tQF rise- and fall-time parameters are measured at the 20% and 80% points of the output transition. Figure 55: RSL Timing - Data Signals for Transmit tQ,MIN tQ,MAX tQ,MAX tQ,MIN 0.25•t CYCLE VQH 50% VQL 80% 20% VCIH 50% VCIL 80% 20% CTM CTMN tQF tQR even odd 0.75•t CYCLE 0.75•t CYCLE DQA DQB VCM VX+ VX- |
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