參數(shù)資料
型號(hào)： MT48LC8M8A2TG-8EL:GIT
元件分類： DRAM
英文描述： 8M X 8 SYNCHRONOUS DRAM, 6 ns, PDSO54
封裝： 0.400 INCH, PLASTIC, TSOP2-54
文件頁數(shù)： 13/55頁
文件大?。?/td> 1454K
20
64Mb: x4, x8, x16 SDRAM
Micron Technology, Inc., reserves the right to change products or specifications without notice.
64MSDRAM.pmd – Rev. H; Pub. 12/04
2002 Micron Technology, Inc. All rights reserved.
64Mb: x4, x8, x16
SDRAM
Figure 12
Terminating a READ Burst
PRECHARGE command is that it requires that the com-
mand and address buses be available at the appropri-
ate time to issue the command; the advantage of the
PRECHARGE command is that it can be used to trun-
cate fixed-length or full-page bursts.
Full-page READ bursts can be truncated with the
BURST TERMINATE command, and fixed-length READ
bursts may be truncated with a BURST TERMINATE
command, provided that auto precharge was not acti-
vated. The BURST TERMINATE command should be
issued x cycles before the clock edge at which the last
desired data element is valid, where x equals the CAS
latency minus one. This is shown in Figure 12 for each
possible CAS latency; data element n + 3 is the last
desired data element of a longer burst.
CLK
DQ
DOUT
n
T2
T1
T4
T3
T6
T5
T0
COMMAND
ADDRESS
READ
NOP
BANK,
COL n
NOP
DOUT
n + 1
DOUT
n + 2
DOUT
n + 3
BURST
TERMINATE
NOP
T7
DON’T CARE
NOTE: DQM is LOW.
CLK
DQ
DOUT
n
T2
T1
T4
T3
T6
T5
T0
COMMAND
ADDRESS
READ
NOP
BANK,
COL n
NOP
DOUT
n + 1
DOUT
n + 2
DOUT
n + 3
BURST
TERMINATE
NOP
X = 1 cycle
CAS Latency = 2
CAS Latency = 3
X = 2 cycles
TRANSITIONING DATA
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