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HYB18L256169BF Datasheet, PDF (21/48 Pages) Qimonda AG – 256-Mbit Mobile-RAM
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HY[B/E]18L256169BF-7.5
256-Mbit Mobile-RAM
Functional Description
2.4.5.1 READ Burst Termination
Data from any READ burst may be truncated using the BURST TERMINATE command (see Page 30), provided
that Auto Precharge was not activated. The BURST TERMINATE latency is equal to the CAS latency, i.e. the
BURST TERMINATE command must be issued x clock cycles before the clock edge at which the last desired data
element is valid, where x equals the CAS latency for READ bursts minus 1. This is shown in Figure 18. The
BURST TERMINATE command may be used to terminate a full-page READ which does not self-terminate.
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./ 0
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SUBSEQ UENTELE MEN TSO F$A TA/U TAREPROVID ED IN THE PROGRA MMED ORDE RFOLLOW IN G$/ N4HE
BURSTIS TERMIN ATEDAFTERTHE RDDATA ELE ME NT
Figure 18 Terminating a READ Burst
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2.4.5.2 Clock Suspend Mode for READ Cycles
Clock suspend mode allows to extend any read burst in progress by a variable number of clock cycles. As long as
CKE is registered LOW, the following internal clock pulse(s) will be ignored and data on DQ will remain driven, as
shown in Figure 19.
#, +
#+ %
IN TERNAL
CLO CK
#OM MA ND
2% !$
!DDRE SS
"A!
#O LN
./ 0
$1
./ 0
T#3 ,
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./ 0
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T#3 ,
"A! #O LNETC"AN K! #O LU MNNETC 
$/N ETC$A TA/U TFRO MCOLU MNNE TC
#, IN THECASESH OWN
#LOCK SU SPEND LATENCY T#3 ,IS  CLO CK CYCLE
Figure 19 Clock Suspend Mode for READ Bursts
Data Sheet
21
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./ 0
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Rev. 1.02, 2006-12
02032006-MP0M-7FQG
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