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512Mb: 32 Meg x 16, 16 Meg x 32 Mobile SDRAM
AUTO REFRESH Operation
Figure 47: Auto Refresh Mode
CLK
T0
tCK
T1
T2
tCH
( (
) )
( (
) )
Tn + 1
tCL
( (
) )
( (
) )
To + 1
CKE
tCKS
tCKH
( (
) )
( (
) )
Command
tCMS tCM H
PRECHARGE
NOP
AUTO
REFRESH
NOP
( (
) )
( ( NOP
) )
AUTO
REFRESH
NOP
( (
) )
( ( NOP
) )
ACTIVE
DQM
( (
) )
( (
) )
( (
) )
( (
) )
Address
( (
) )
( (
) )
( (
) )
( (
) )
Row
A10
All banks
Single bank
( (
) )
( (
) )
( (
) )
( (
) )
Row
t AS
tAH
BA0, BA1
Bank(s)
( (
) )
( (
) )
( (
) )
( (
) )
Bank
DQ High-Z
tRP
tRFC
( (
) )
tRFC
( (
) )
Precharge all
active banks
Note:
1. Back-to-back AUTO REFRESH commands are not required.
Don’t Care
PDF: 09005aef8459c827
512mb_mobile_sdram_y67m_at.pdf – Rev. B 3/11 EN
77
Micron Technology, Inc. reserves the right to change products or specifications without notice.
? 2011 Micron Technology, Inc. All rights reserved.
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