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512Mb: 32 Meg x 16, 16 Meg x 32 Mobile SDRAM
SELF REFRESH Operation
Figure 48: Self Refresh Mode
CLK
CKE
tCKS
T0
tCK
tCKH
T1
tCH
T2
tCL
tCKS
( (
) )
( (
) )
( (
) )
Tn + 1
( (
) )
( (
) )
( (
) )
( (
) )
To + 1
To + 2
Command
tCMS tCMH
PRECHARGE
NOP
AUTO
REFRESH
( (
) )
( (
) )
( (
) )
NOP ( (
) )
AUTO
REFRESH
DQM
Address
( (
) )
( (
) )
( (
) )
( (
) )
( (
) )
( (
) )
( (
) )
( (
) )
A10
BA0, BA1
All banks
Single bank
t AS tAH
Bank(s)
( (
) )
( (
) )
( (
) )
( (
) )
( (
) )
( (
) )
( (
) )
( (
) )
DQ
High-Z
tRP
( (
) )
( (
) )
tXSR
Precharge all
active banks
Enter self refresh mode
CLK stable prior to exiting
self refresh mode
Exit self refresh mode
(Restart refresh time base)
Don’t Care
Note:
1. Each AUTO REFRESH command performs a REFRESH cycle. Back-to-back commands are
not required.
PDF: 09005aef8459c827
512mb_mobile_sdram_y67m_at.pdf – Rev. B 3/11 EN
79
Micron Technology, Inc. reserves the right to change products or specifications without notice.
? 2011 Micron Technology, Inc. All rights reserved.
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