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EDD2508AKTA-5B-E Datasheet(PDF) 26 Page - Elpida Memory |
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EDD2508AKTA-5B-E Datasheet(HTML) 26 Page - Elpida Memory |
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26 / 48 page  EDD2508AKTA-5-E Preliminary Data Sheet E0609E20 (Ver. 2.0) 26 Auto Precharge Read with auto-precharge The precharge is automatically performed after completing a read operation. The precharge starts tRPD (BL/2) cycle after READA command input. tRAP specification for READA allows a read command with auto precharge to be issued to a bank that has been activated (opened) but has not yet satisfied the tRAS (min) specification. A column command to the other active bank can be issued the next cycle after the last data output. Read with auto-precharge command does not limit row commands execution for other bank. Refer to ‘Function truth table and related note(Notes.*14). out0 out1 out2 out3 CK /CK DQ Command tRP (min) tRAP (min) = tRCD (min) ACT Note: Internal auto-precharge starts at the timing indicated by " ". NOP 2 cycles (= BL/2) READA ACT DQS tAC,tDQSCK tRPD Read with auto-precharge Write with auto-precharge The precharge is automatically performed after completing a burst write operation. The precharge operation is started (BL/ 2 + 4) cycles after WRITA command issued. A column command to the other banks can be issued the next cycle after the internal precharge command issued. Write with auto-precharge command does not limit row commands execution for other bank. Refer to the ‘Read with Auto-Precharge Enabled, Write with Auto-Precharge Enabled’ section. Refer to ‘Function truth table and related note(Notes.*14)‘. in1 in2 in3 in4 CK /CK DQ Command DM tRAS (min) tRCD (min) tRP DQS ACT WRITA ACT BL/2 + 4 cycles Note: Internal auto-precharge starts at the timing indicated by " ". BL = 4 NOP NOP Burst Write (BL = 4) |
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