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NT5TU64M8EE Datasheet(PDF) 90 Page - Nanya Technology Corporation. |
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NT5TU64M8EE Datasheet(HTML) 90 Page - Nanya Technology Corporation. |
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90 / 96 page  DDR2 512Mb SDRAM NT5TU64M8EE / NT5TU32M16EG 90 Version 1.0 Nanya Technology Corp.© 09/2014 All Rights Reserved tnPARAM = RU{tPARAM / tCK(avg)}, which is in clock cycles, assuming all input clock jitter specifications are satisfied. For example, the device will support tnRP = RU{tRP / tCK(avg)}, which is in clock cycles, if all input clock jitter specifications are met. This means: For DDR2-667 5-5-5, of which tRP = 15ns, the device will support tnRP =RU{tRP / tCK(avg)} = 5, i.e. as long as the input clock jitter specifications are met, Precharge command at Tm and active command at Tm+5 is valid even if (Tm+5 - Tm) is less than 15ns due to input clock jitter. Specific Note 33 tDAL [nCK] = WR [nCK] + tnRP [nCK] = WR + RU {tRP [ps] / tCK(avg) [ps] }, where WR is the value programmed in the mode register set. ex) For DDR2-1066 7-7-7 at tCK(avg) = 1.875 ns with WR programmed to 8 nCK, tDAL = 8 + RU{13.125 ns / 1.875 ns} [nCK] = 8 + 7 [nCK] = 15 [nCK] Specific Note 34 New units, ‘tCK(avg)’ and ‘nCK’, are introduced in DDR2-667, DDR2-800 Unit ‘tCK(avg)’ represents the actual tCK(avg) of the input clock under operation. Unit ‘nCK’ represents one clock cycle of the input clock, counting the actual clock edges. ex) tXP = 2 [nCK] means; if Power Down exit is registered at Tm, an Active command may be registered at Tm+2,even if (Tm+2 - Tm) is 2 x tCK(avg) + tERR(2per),min. ex) tXP = 3 [nCK] means; if Power Down exit is registered at Tm, an Active command may be registered at Tm+3, even if (Tm+3 - Tm) is 3 x tCK(avg) + tERR(3per),min. |
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