hyb18m1g16 Qimonda, hyb18m1g16 Datasheet - Page 29
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hyb18m1g16
Manufacturer Part Number
hyb18m1g16
Description
Drams For Mobile Applications 1-gbit X16 Ddr Mobile-ram Rohs Compliant
Manufacturer
Qimonda
Datasheet
1.HYB18M1G16.pdf
(65 pages)
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2.4.5.2
Data from any READ burst must be completed or truncated before a subsequent WRITE command can be issued. If truncation
is necessary, the BURST TERMINATE command must be used, as shown in
2.4.5.3
A READ burst may be followed by, or truncated with a PRECHARGE command to the same bank (provided that Auto
Precharge was not activated).
The PRECHARGE command should be issued x clock cycles after the READ command, where x equals the number of desired
data element pairs. This is shown in
bank cannot be issued until t
data elements.
In the case of a READ 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 READ burst with Auto Precharge enabled. 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
Command
Command
Address
Address
DO n = Data Out from column n; DI b = Data In to column b
1 subsequent element of Data Out appear in the programmed order following DO n.
Data In elements are applied following DI b in the programmed order
DQS
DQS
DM
DM
DQ
DQ
CK
CK
BA,Col n
BA,Col n
READ
READ
READ to WRITE
READ to PRECHARGE
RP
is met. Please note that part of the row precharge time is hidden during the access of the last
CL=2
Figure
BST
BST
20. Following the PRECHARGE command, a subsequent command to the same
CL=3
DO n
NOP
NOP
29
DO n
BA,Col b
WRITE
NOP
Figure
t
DQSS
19.
Di b
BA,Col b
WRITE
NOP
HY[B/E]18M1G16[0/1]BF
1-Gbit DDR Mobile-RAM
Di b
READ to WRITE
FIGURE 19
= Don't Care
NOP
NOP
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