Data Sheet.
HY[B/E]18L512160BF-7.5
512-Mbit Mobile-RAM
FIGURE 44
Self Refresh Entry and Exit
#,+
#+%
T20
T2#
T2#
T32%8
02%
./0
!2&
./0
./0
./0
!2&
./0
!#4
#OMMAND
!DDRESS
"A !ꢅ
2OW N
2OW N
!ꢃꢄ ꢀ!0ꢁ
$1
0RE !LL
(IGHꢆ:
ꢂ $ONgT #ARE
3ELF 2EFRESH
%NTRY #OMMAND %XIT #OMMAND
3ELF 2EFRESH
%XIT FROM
3ELF 2EFRESH
!NY #OMMAND
ꢀ!UTO 2EFRESH
2ECOMMENDEDꢁ
TABLE 15
Timing Parameters for AUTO REFRESH and SELF REFRESH
Symbol - 7.5 Units Notes
Parameter
min.
max.
1)
1)
1)
1)
ACTIVE to ACTIVE command period tRC
67
19
—
1
—
ns
ns
ms
tCK
PRECHARGE command period
Refresh period (8192 rows)
Self refresh exit time
tRP
tREF
tSREX
—
64
—
1) These parameters account for the number of clock cycles and depend on the operating frequency as follows:no. of clock cycles = specified
delay / clock period; round up to next integer.
Rev. 1.22, 2006-12
41
01132005-06IU-IGVM
QIMONDA [ QIMONDA AG ]
