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EDS1232AATA-75L-E Datasheet(PDF) 37 Page - Elpida Memory |
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EDS1232AATA-75L-E Datasheet(HTML) 37 Page - Elpida Memory |
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37 / 53 page  EDS1232AATA Data Sheet E0386E40 (Ver. 4.0) 37 Read with auto precharge to Write command interval 1. Different bank: When some banks are in the active state, the second write command (another bank) is executed. However, DQM must be set High so that the output buffer becomes High-Z before data input. The internal auto- precharge of one bank starts at the next clock of the second command. CLK Command BS DQ (output) DQ (input) CL = 2 CL = 3 READA WRIT in B0 in B1 in B2 in B3 BL = 4 bank0 ReadA bank3 Write Note: Internal auto-precharge starts at the timing indicated by " ". DQM High-Z Read with Auto Precharge to Write Command Interval (Different bank) 2. Same bank: The consecutive write command from read with auto precharge (the same bank) is illegal. It is necessary to separate the two commands with a bank active command. Write with auto precharge to Read command interval 1. Different bank: When some banks are in the active state, the second read command (another bank) is executed. However, in case of a burst write, data will continue to be written until one clock before the read command is executed. The internal auto-precharge of one bank starts at 2 clocks later from the second command. CLK Command BS DQ (output) DQ (input) WRITA READ out B0 out B1 out B2 out B3 CL = 3 BL = 4 bank0 WriteA bank3 Read Note: Internal auto-precharge starts at the timing indicated by " ". DQM in A0 Write with Auto Precharge to Read Command Interval (Different bank) 2. Same bank: The consecutive read command from write with auto precharge (the same bank) is illegal. It is necessary to separate the two commands with a bank active command. |
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