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HM5225165B-75 View Datasheet(PDF) - Elpida Memory, Inc

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HM5225165B-75 Datasheet PDF : 63 Pages
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HM5225165B/HM5225805B/HM5225405B-75/A6/B6
Auto Precharge
Read with auto-precharge: In this operation, since precharge is automatically performed after completing a
read operation, a precharge command need not be executed after each read operation. The command executed
for the same bank after the execution of this command must be the bank active (ACTV) command. In
addition, an interval defined by lAPR is required before execution of the next command.
CAS latency
3
2
Precharge start cycle
2 cycle before the final data is output
1 cycle before the final data is output
Burst Read (Burst Length = 4)
CLK
CL=2 Command
DQ (input)
ACTV
CL=3 Command
DQ (input)
ACTV
lRAS
READ A
lRAS
READ A
ACTV
out0
out1
out2
out3
lAPR
ACTV
out0
out1
out2
out3
lAPR
Note: Internal auto-precharge starts at the timing indicated by " ".
And an interval of tRAS (lRAS) is required between previous active (ACTV) command and internal precharge " ".
Data Sheet E0082H10
25
 

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