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EM636165VE-55 Datasheet(PDF) 8 Page - Etron Technology, Inc. |
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EM636165VE-55 Datasheet(HTML) 8 Page - Etron Technology, Inc. |
8 / 74 page EtronTech 1M x 16 SDRAM EM636165 Preliminary 8 Rev. 1.8 Nov 2001 CLK DQM COMMAND CAS# latency=1 tCK1, DQ's T0 T 1 T2T3 T4T5 T6 T7 T8 NOP NOP NOP READ A WRITE A NOP NOP NOP BANKA ACTIVATE DIN A0 DIN A1 DIN A2 DIN A3 DIN A0 DIN A1 DIN A2 DIN A3 Must be Hi-Z before the Write Command 1 Clk Interval CAS# latency=2 tCK2, DQ's : "H" or "L" Read to Write Interval (Burst Length ≥ 4, CAS# Latency = 1, 2) CLK DQM COM M AND CAS# latency=1 tCK1, DQ's T0 T1 T2T3 T4T5 T6T7 T8 NOP READ A NOP WRITE B NOP NOP NOP DIN B0 DIN B1 DIN B2 DIN B3 DIN B0 DIN B1 DIN B2 DIN B3 Must be Hi-Z before the Write Command CAS# latency=2 tCK2, DQ's NOP NOP DOUT A0 : "H" or "L" Read to Write Interval (Burst Length ≥ 4, CAS# Latency = 1, 2) A read burst without the auto precharge function may be interrupted by a BankPrecharge/ PrechargeAll command to the same bank. The following figure shows the optimum time that BankPrecharge/ PrechargeAll command is issued in different CAS# latency. CLK COMMAND CAS# latency=2 tCK2, DQ's T0 T1 T2T3 T4 T5 T6T7 T8 READ A NOP NOP NOP NOP Activate NOP NOP Precharge CAS# latency=3 tCK3, DQ's DOUT A0 DOUT A1 DOUT A2 DOUT A3 DOUT A0 DOUT A1 DOUT A2 DOUT A3 DOUT A0 DOUT A1 DOUT A2 DOUT A3 ADDRESS CAS# latency=1 tCK1, DQ's tRP Bank, Col A Bank(s) Bank, Row Read to Precharge (CAS# Latency = 1, 2, 3) |
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