參數(shù)資料
型號: HYB18T256324F-22
廠商: INFINEON TECHNOLOGIES AG
英文描述: 256-Mbit GDDR3 DRAM [600MHz]
中文描述: 256兆GDDR3顯示內(nèi)存[600MHz的]
文件頁數(shù): 36/80頁
文件大?。?/td> 2026K
代理商: HYB18T256324F-22
HYB18T256324F–[16/20/22]
256-Mbit DDR SGRAM
Functional Description
Data Sheet
36
Rev. 1.11, 04-2005
10292004-DOXT-FS0U
Back to back WR commands are possible and produce
a continuous flow of input data. There must be one
NOP cycle between two back to back WR commands.
Any WR burst may be followed by a subsequent RD
command.
Figure 3.7.5
shows the timing requirements
for a WR followed by a RD. A WR may also be followed
by a PRE command to the same bank. t
WR
has to be
met as shown in
Figure 3.7.8
.
Setup and hold time for incoming DQs and DMs relative
to the WDQS edges are specified as
t
DS
and
t
DH
. DQ
and DM input pulse width for each input is defined as
t
DIPW
. The input data is masked if the corresponding DM
signal is high.
All timing parameters are defined with graphics DRAM
terminations on.
Figure 20
Basic Write Burst / DM Timing
Note:: WDQS can only transition when data is applied at the chip input and during pre- and postambles
Table 22
WDQS
WDQS0
WDQS1
WDQS2
WDQS3
Mapping of WDQS and DM signals
Data mask signal
DM0
DM1
DM2
DM3
Controlled DQs
DQ0 - DQ7
DQ8 - DQ15
DQ16 - DQ23
DQ24 - DQ31
$1
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$ONgT #ARE
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$(
T
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T
$3
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$133
$ATA MASKED
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$
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T
702%
T
7034
0REAMBLE
0OSTAMBLE
MAX T
$1 33
T
$1 33
T
$3
T
$1 3,
T
$13
(
T
$1 3
(
T
$)07
T
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NOMINAL 7$13
LATE 7$13
EARLY 7$13
7$13
7$13
7$13
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