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AS4C64M8D2 데이터시트(PDF) 53 Page - Alliance Semiconductor Corporation

부품명 AS4C64M8D2
상세설명  Fully synchronous operation
PDF  59 Pages
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AS4C64M8D2
Confidential
53
Rev. 1.0
Feb. /2014
Figure 47. CKE intensive environment
CK#
CKE
tCKE
NOTE: The pattern shown above can repeat over a long period of time. With this pattern, DRAM guarantees all AC and DC timing & voltage
specifications and DLL operation with temperature and voltage drift
CK
tCKE
tCKE
tCKE
tXP
tXP
tREFI
REF
REF
CMD
Figure 48. Read to power-down entry
CK#
CMD
BL=4
T0
T2
Tx
Tx+1
Tx+2
Tx+3
Tx+4
Tx+5
Tx+6
Tx+7
T1
Tx+8
Tx+9
RD
Q
AL+CL
Read operation starts with a read command and
DQS
CKE
CK
DQS#
CKE should be kept HIGH until the end of burst operation
tIS
Q
Q
Q
DQ
CK#
CMD
BL=8
T0
T2
Tx
Tx+1
Tx+2
Tx+3
Tx+4
Tx+5
Tx+6
Tx+7
T1
Tx+8
Tx+9
RD
Q
AL+CL
DQS
CKE
CK
DQS#
CKE should be kept HIGH until the end of burst operation
tIS
Q
Q
Q
DQ
Q
Q
Q
Q



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