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| HYB18L256169BF Datasheet, PDF (19/48 Pages) Qimonda AG – 256-Mbit Mobile-RAM | |||
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HY[B/E]18L256169BF-7.5
256-Mbit Mobile-RAM
Functional Description
#, +
T 2# $
#O MM A N D ! #4
! DD R E SS
"A !
2O W X
./ 0
./ 0
! ! 0 2O W X
$1
T 2! 3
T2 #
2% ! $ ./ 0 ./ 0
"A !
#O L N
$I S ! 0
# ,
T 20
./ 0 0 2% ./ 0
0R E !L L
!0
0R E " A N K !
./ 0
!# 4
"A !
2O W B
2O W B
$/ N $/ N $/ N $/ N
"A ! #O L N B A NK ! C O LU M N N
!0 ! UT O 0R E C HA R GE
$/ N $A T A / U T F R OM C O LU M N N
$ IS ! 0 $I S A B LE ! U T O 0 R EC H A R G E
"U R S T , E NG T H IN T H E C AS E S H OW N
SU B SE Q U EN T E LE ME N TS O F $A T A / U T A R E P R O V ID ED IN T H E P R O GR A M ME D O R D ER F O LL O WI NG $/ N
$O Ng T #A RE
Figure 14 Single READ Burst (CAS Latency = 3)
Data from any READ burst may be concatenated with data from a subsequent READ command. In either case, a
continuous flow of data can be maintained. A READ command can be initiated on any clock cycle following a
previous READ command, and may be performed to the same or a different (active) bank. The first data element
from the new burst follows either the last element of a completed burst (Figure 15) or the last desired data element
of a longer burst which is being truncated (Figure 16). The new READ command should be issued x cycles after
the first READ command, where x equals the number of desired data elements.
#, +
# OM MA N D 2% ! $
! D D RE S S "# AO L! N
$1
$1
./ 0
./ 0
./ 0
2% ! $
./ 0
./ 0
./ 0
./ 0
#,
"#A O L! B
$/ N $/ N $/ N $/ N $/ B $/ B $/ B
#,
$/ N $/ N $/ N $/ N $/ B $/ B
" A ! # OL N B " AN K ! # O LU M N N B
$ / N B $A T A / UT F R O M C O LU MN N B
" U R ST , E N G T H IN TH E C A S E SH O WN
S U B S EQ U E N T E LE M E N T S O F $A T A /U T A R E P R O V ID E D IN T HE P R OG R A MM E D O R DE R F OL L OW IN G $/ N B
Figure 15 Consecutive READ Bursts
$O N gT #A R E
Data Sheet
19
Rev. 1.02, 2006-12
02032006-MP0M-7FQG
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