參數(shù)資料
型號: MT48H16M16LFFG
廠商: Micron Technology, Inc.
英文描述: MOBILE SDRAM
中文描述: 移動(dòng)SDRAM
文件頁數(shù): 20/58頁
文件大小: 1451K
代理商: MT48H16M16LFFG
20
256Mb: x16 Mobile SDRAM
MobileRamY26L_A.p65 – Pub. 5/02
Micron Technology, Inc., reserves the right to change products or specifications without notice.
2002, Micron Technology, Inc.
256Mb: x16
MOBILE SDRAM
ADVANCE
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.
DON’T CARE
CLK
DQ
D
OUT
n
T2
T1
T4
T3
T6
T5
T0
COMMAND
ADDRESS
READ
NOP
NOP
NOP
NOP
BANK,
COL
n
NOP
D
OUT
n
+ 1
D
OUT
n
+ 2
D
OUT
n
+ 3
BURST
TERMINATE
NOP
T7
NOTE:
DQM is LOW.
CLK
DQ
D
OUT
n
T2
T1
T4
T3
T6
T5
T0
COMMAND
ADDRESS
READ
NOP
NOP
NOP
BANK,
COL
n
NOP
D
OUT
n
+ 1
D
OUT
n
+ 2
D
OUT
n
+ 3
BURST
TERMINATE
NOP
CLK
DQ
D
OUT
n
T2
T1
T4
T3
T6
T5
T0
COMMAND
ADDRESS
READ
NOP
NOP
NOP
BANK,
COL
n
NOP
D
OUT
n
+ 1
D
OUT
n
+ 2
D
OUT
n
+ 3
BURST
TERMINATE
NOP
X
= 0 cycles
CAS Latency = 1
X
= 1 cycle
CAS Latency = 2
CAS Latency = 3
X
= 2 cycles
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