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H5MS1222EFP-Q3M Datasheet(PDF) 31 Page - Hynix Semiconductor |
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H5MS1222EFP-Q3M Datasheet(HTML) 31 Page - Hynix Semiconductor |
31 / 62 page Rev 1.0 / Jun. 2008 31 Mobile DDR SDRAM 128Mbit (4M x 32bit) H5MS1222EFP Series READ The basic Read timing parameters for DQ are shown next figure (Basic Read Timing Parameters). They apply to all Read operations. During Read bursts, DQS is driven by the Mobile DDR SDRAM along with the output data. The initial Low state of the DQS is known as the read preamble; the Low state coincident with last data-out element is known as the read postamble. Basic Read Timing Parameters Do n Do n+ 1 Don+ 2 Don+3 /CLK CLK tCK tCK tCH tCL tRPRE tDQSCK tD QSQ max tAC tLZ tQ H tDQ SCK tQ H tQ H tHZ tQ H tRPRE tDQSCK tLZ tDQ SCK tRPST tAC tDQSQ m ax Do n Do n+1 Don+2 Don+3 DQS DQ DQS DQ Don't Care 1) D o n : Data Out from colum n n 2) All DQ are vaild tAC after the CK edge All D Q are vaild tD QSQ after the DQ S edge, regardless of tAC tRPST tACm ax tACm in tQH tHZ |
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