hyb18m1g16 Qimonda, hyb18m1g16 Datasheet - Page 39

• Manufacturer Part Number: hyb18m1g16
• Description: Drams For Mobile Applications 1-gbit X16 Ddr Mobile-ram Rohs Compliant
• Manufacturer: Qimonda

2.4.7.2
Data for any WRITE burst may be followed by a subsequent PRECHARGE command. To follow a WRITE without truncating
the WRITE burst,
Data for any WRITE burst may be truncated by a subsequent PRECHARGE command, as shown in
the data-in pairs that are registered prior to the t
be masked with DM. Following the PRECHARGE command, a subsequent command to the same bank cannot be issued until
t
In the case of a WRITE burst being executed to completion, a PRECHARGE command issued at the optimum time (as
described above) provides the same operation that would result from the same burst with Auto Precharge. The disadvantage
of the PRECHARGE command is that it requires that the command and address busses be available at the appropriate time
to issue the command. The advantage of the PRECHARGE command is that it can be used to truncate bursts.
Rev.1.0, 2007-03
10242006-Y557-TZXW
RP
is met.
Command
Address
DI b = Data In to column b .
3 subsequent elements of Data In are applied in the programmed order following DI b.
A non-interrupted burst of 4 is shown.
t
A10 is LOW with the WRITE command (Auto Precharge is disabled)
WR
DQS
is referenced from the positive clock edge after the last Data In pair.
DM
DQ
CK
CK
t
WR
BA,Col b
WRITE
WRITE to PRECHARGE
should be met as shown in
t
DQSSmax
NOP
Di b
WR
Figure
period are written to the internal array, and any subsequent data in should
NOP
30.
39
Non-Interrupting WRITE to PRECHARGE (max. t
NOP
NOP
t
WR
HY[B/E]18M1G16[0/1]BF
1-Gbit DDR Mobile-RAM
Figure
FIGURE 30
(or all)
= Don't Care
31. Note that only
BA a
PRE
Data Sheet
DQSS
)