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参数资料
| 型号： | MT48LC2M32LFFC |
| 厂商： | Micron Technology, Inc. |
| 英文描述： | 512K x 32 x 4 banks 3.3v SDRAM(3.3V,512K x 32 x 4组同步动态RAM) |
| 中文描述： | 为512k × 32 × 4银行3.3V的内存电压（3.3V，512K采样× 32 × 4组同步动态RAM）的 |
| 文件页数： | 22/50页 |
| 文件大小： | 1054K |
| 代理商： | MT48LC2M32LFFC |
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22
64Mb: x32, 3.3V SDRAM
BatRam_3V.p65 – Rev. 0.7, Pub. 2/01
Micron Technology, Inc., reserves the right to change products or specifications without notice.
2001, Micron Technology, Inc.
64Mb: x32, 3.3V
SDRAM
PRELIMINARY
Figure 22
Clock Suspend During WRITE Burst
DON’T CARE
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
NOTE:
For this example, CAS latency = 2, burst length = 4 or greater, and
DQM is LOW.
CKE
INTERNAL
CLOCK
NOP
Figure 23
Clock Suspend During READ Burst
CLK
DQ
D
IN
n
T2
T1
T3
T0
COMMAND
ADDRESS
NOP
NOP
WRITE
D
IN
n
+ 1
NOP
BANK,
COL
n
NOTE:
Burst length = 2. DQM is LOW.
CLOCK SUSPEND
The clock suspend mode occurs when a column ac-
cess/burst is in progress and CKE is registered LOW. In
the clock suspend mode, the internal clock is deacti-
vated, “freezing” the synchronous logic.
For each positive clock edge on which CKE is
sampled LOW, the next internal positive clock edge is
suspended. Any command or data present on the in-
put pins at the time of a suspended internal clock edge
is ignored; any data present on the DQ pins remains
driven; and burst counters are not incremented, as
long as the clock is suspended. (See examples in Fig-
ures 22 and 23.)
Clock suspend mode is exited by registering CKE
HIGH; the internal clock and related operation will re-
sume on the subsequent positive clock edge.
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