HY[B/E]18L128160B[C/F]-7.5
128-Mbit Mobile-RAM
Functional DescriptionCommands
2.4.6.3
WRITE - DQM Operation
DQM may be used to mask write data: when asserted HIGH, input data will be masked and no write will be
performed. The generic timing parameters as listed in Table 12 also apply to this DQM operation. The write burst
in progress is not affected and will continue as programmed.
#,+
./0
72)4%
./0
./0
./0
./0
#OMMAND
!DDRESS
$1-
"A !ꢉ
#OL N
$) N
$) Nꢓꢆ
$) Nꢓꢐ
$1
ꢃ $ONgT #ARE
"A !ꢉ #OL N ꢃ "ANK !ꢉ #OLUMN N
$) N ꢃ $ATA )N TO COLUMN N
"URST ,ENGTH ꢃ ꢏ IN THE CASE SHOWNꢂ
ꢐ SUBSEQUENT ELEMENTS OF $ATA )N ARE PROVIDED IN THE PROGRAMMED ORDER FOLLOWING
$) Nꢉ WITH THE FIRST ELEMENT ꢇ$) Nꢓꢅꢈ BEING MASKEDꢂ
$1- WRITE LATENCY IS ꢄ CLOCK CYCLESꢂ
Figure 32 WRITE Burst - DQM Operation
2.4.6.4
WRITE to READ
A WRITE burst may be followed by, or truncated with a READ command. The READ command can be performed
to the same or a different (active) bank. With the registration of the READ command, data inputs will be ignored
and no WRITE will be performed, as shown in Figure 33.
#,+
72)4%
./0
./0
2%!$
./0
./0
./0
./0
#OMMAND
!DDRESS
"A !ꢉ
#OL N
"A !ꢉ
#OL B
#,ꢃꢆ
(IGHꢀ:
$) N
$) N
$) Nꢓꢅ
$) Nꢓꢅ
$) Nꢓꢆ
$/ B
$/ Bꢓꢅ
$/ Bꢓꢆ
$1
$1
7RITE DATA
ARE IGNORED
#,ꢃꢐ
(IGHꢀ:
$) Nꢓꢆ
$/ B
$) Bꢓꢅ
"A !ꢉ #OL N ꢇBꢈ ꢃ BANK !ꢉ COLUMN N ꢇBꢈ
$) N ꢃ $ATA )N TO COLUMN Nꢔ $/ B ꢃ $ATA /UT FROM COLUMN Bꢔ
"URST ,ENGTH ꢃ ꢏ IN THE CASE SHOWNꢂ
ꢃ $ONgT #ARE
ꢐ SUBSEQUENT ELEMENTS OF $ATA )N ꢇ/UTꢈ ARE PROVIDED IN THE PROGRAMMED ORDER FOLLOWING $) N ꢇ$/ Bꢈꢂ
$) Nꢓꢐ IS IGNORED DUE TO 2%!$ COMMANDꢂ .O $1- MASKING REQUIRED AT THIS POINTꢂ
Figure 33 WRITE to READ Timing
Data Sheet
32
Rev. 1.71, 2007-01
05282004-NZNK-8T0D
QIMONDA [ QIMONDA AG ]
