HYB18M1G320BF QIMONDA [Qimonda AG], HYB18M1G320BF Datasheet - Page 36

• Manufacturer Part Number: HYB18M1G320BF
• Description: DRAMs for Mobile Applications 1-Gbit x32 DDR Mobile-RAM
• Manufacturer: QIMONDA [Qimonda AG]

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.1.00, 2007-03
02022006-J7N7-GYFP
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
29.
36
Non-Interrupting WRITE to PRECHARGE (max. t
NOP
NOP
t
WR
1-Gbit DDR Mobile-RAM
Figure
HY[B/E]18M1G320BF
FIGURE 29
(or all)
= Don't Care
30. Note that only
BA a
PRE
Data Sheet
DQSS
)