HY[B/E]18L128160B[C/F]-7.5
128-Mbit Mobile-RAM
Functional DescriptionCommands
#,+
#+%
INTERNAL
CLOCK
2%!$
./0
./0
./0
./0
./0
#OMMAND
!DDRESS
"A !ꢉ
#OL N
T#3,
$/ N
T#3,
T#3,
$/ Nꢓꢅ
$/ Nꢓꢅ
$/ Nꢓꢆ
$1
ꢃ $ONgT #ARE
"A !ꢉ #OL N ETCꢂ ꢃ "ANK !ꢉ #OLUMN N ETCꢂ
$/ N ETCꢂ ꢃ $ATA /UT FROM COLUMN N ETCꢂ
#, ꢃ ꢆ IN THE CASE SHOWN
#LOCK SUSPEND LATENCY T#3, IS ꢅ CLOCK CYCLE
Figure 19 Clock Suspend Mode for READ Bursts
2.4.5.3
READ - DQM Operation
DQM may be used to suppress read data and place the output buffers into High-Z state. The generic timing
parameters as listed in Table 11 also apply to this DQM operation. The read burst in progress is not affected and
will continue as programmed.
#,+
2%!$
./0
./0
T$1:
./0
./0
./0
./0
./0
#OMMAND
!DDRESS
"A !ꢉ
#OL N
$1-
$1
$/ N
$/ Nꢓꢆ
$/ Nꢓꢐ
ꢃ $ONgT #ARE
"A !ꢉ #OL N ꢃ BANK !ꢉ COLUMN N
$/ N ꢃ $ATA /UT FROM COLUMN N
#, ꢃ ꢆ IN THE CASE SHOWNꢂ
$1- READ LATENCY T$1: IS ꢆ CLOCK CYCLES
Figure 20 READ Burst - DQM Operation
2.4.5.4
READ to WRITE
A READ burst may be followed by or truncated with a WRITE command. The WRITE command can be performed
to the same or a different (active) bank. Care must be taken to avoid bus contention on the DQs; therefore it is
recommended that the DQs are held in High-Z state for a minimum of 1 clock cycle. This can be achieved by either
delaying the WRITE command, or suppressing the data-out from the READ by pulling DQM HIGH two clock cycles
Data Sheet
24
Rev. 1.71, 2007-01
05282004-NZNK-8T0D
QIMONDA [ QIMONDA AG ]
