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NT5TU64M8EE Datasheet(PDF) 36 Page - Nanya Technology Corporation. |
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NT5TU64M8EE Datasheet(HTML) 36 Page - Nanya Technology Corporation. |
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36 / 96 page  DDR2 512Mb SDRAM NT5TU64M8EE / NT5TU32M16EG 36 Version 1.0 Nanya Technology Corp.© 09/2014 All Rights Reserved Burst Read Operation Followed by Precharge: RL = 4, (AL = 0, CL = 4), BL = 8, tRTP > 2 clocks NOP NOP NOP READ A T0 T2 T1 T3 T4 T5 T6 T7 T8 CMD DQ BR-P404(8) NOP AL + BL/2 clks + 1 Dout A0 Dout A1 Dout A2 Dout A3 CL = 4 RL = 4 >=tRAS >=tRP DQS, DQS NOP >=tRTP Dout A4 Dout A5 Dout A6 Dout A7 Precharge NOP Bank A Activate first 4-bit prefetch second 4-bit prefetch CK, CK Burst Write followed by Precharge Minimum Write to Precharge command spacing to the same bank = WL + BL/2 + tWR. For write cycles, a delay must be satisfied from the completion of the last burst write cycle until the Precharge command can be issued. This delay is known as a write recovery time (tWR) referenced from the completion of the burst write to the Precharge command. No Precharge command should be issued prior to the tWR delay, as DDR2 SDRAM does not support any burst interrupt by a Precharge command. tWR is an analog timing parameter (see the AC table in this datasheet) and is not the programmed value for tWR in the MRS. Examples: Burst Write followed by Precharge : WL = (RL - 1) = 3, BL = 4, tWR = 3 NOP NOP NOP NOP NOP WRITE A Post CAS T 0 T 2 T 1 T 3 T 4 T 5 T 6 T 7 T 8 WL = 3 BW-P3 CMD DQ NOP DIN A0 DIN A1 DIN A2 DIN A3 >=tWR Completion of the Burst Write Precharge A NOP DQS, DQS CK, CK |
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