HY[B/E]18L256160B[C/F]X-7.5
256-Mbit Mobile-RAM
Functional Description
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$/ N ꢒ $ATA /UT FROM COLUMN N
"URST ,ENGTH ꢒ ꢈ IN THE CASE SHOWNꢐ
!0 ꢒ !UTO 0RECHARGE
$IS !0 ꢒ $ISABLE !UTO 0RECHARGE
ꢆ SUBSEQUENT ELEMENTS OF $ATA /UT ARE PROVI E IN THE PROGRAMME OR ER FOLLOWING $/ Nꢐ
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.
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"A !ꢏ #OL N ꢌBꢍ ꢒ "ANK !ꢏ #OLUMN N ꢌBꢍ
$/ N ꢌBꢍ ꢒ $ATA /UT FROM COLUMN N ꢌBꢍ
"URST ,ENGTH ꢒ ꢈ IN THE CASE SHOWNꢐ
ꢆ SUBSEQUENT ELEMENTS OF $ATA /UT ARE PROVI E IN THE PROGRAMME OR ER FOLLOWING $/ N ꢌBꢍꢐ
Figure 15 Consecutive READ Bursts
Data Sheet
19
Rev. 1.11, 2007-01
07142005-CR47-RB2E
QIMONDA [ QIMONDA AG ]
