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參數(shù)資料
| 型號(hào)： | M13S64164A-6TG |
| 廠商： | ELITE SEMICONDUCTOR MEMORY TECHNOLOGY INC |
| 元件分類： | DRAM |
| 英文描述： | 1M x 16 Bit x 4 Banks Double Data Rate SDRAM |
| 中文描述： | 4M X 16 DDR DRAM, 0.7 ns, PDSO66 |
| 封裝： | 0.400 X 0.875 INCH, 0.65 MM PITCH, LEAD FREE, TSOP2-66 |
| 文件頁數(shù)： | 23/49頁 |
| 文件大?。?/td> | 1526K |
| 代理商： | M13S64164A-6TG |
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ES MT
Preliminary
M13S64164A
Elite Semiconductor Memory Technology Inc.
Publication Date : Jul. 2007
Revision : 0.3 23/49
1. For the earliest possible Precharge command following a Write burst without interrupting the burst, the minimum time for write
recovery is defined by t
WR
.
2. When a precharge command interrupts a Write burst operation, the data mask pin, DQ, is used to mask input data during the
time between the last valid write data and the rising clock edge in which the Precharge command is given. During this time, the
DQS input is still required to strobe in the state of DM.
The minimum time for write recovery is defined by t
WR
.
3. For a Write with autoprecharge command, a new Bank Activate command may be issued to the same bank after t
WR
+ t
RP
where
t
WR
+ t
RP
starts on the falling DQS edge that strobed in the last valid data and ends on the rising clock edge that strobes in the
Bank Activate commands. During write with autoprecharge, the initiation of the internal precharge occurs at the same time as
the earliest possible external Precharge command without interrupting the Write burst as described in 1 above.
4. In all cases, a Precharge operation cannot be initiated unless t
RAS
(min) [minimum Bank Activate to Precharge time] has been
satisfied. This includes Write with autoprecharge commands where t
RAS
(min) must still be satisfied such that a Write with
autoprecharge command has the same timing as a Write command followed by the earliest possible Precharge command
which does not interrupt the burst.
Burst Stop
The burst stop command is initiated by having RAS and CAS high with CS and
WE
low at the rising edge of the clock
(CLK). The burst stop command has the fewest restriction making it the easiest method to use when terminating a burst read
operation before it has been completed. When the burst stop command is issued during a burst read cycle, the pair of data and
DQS (Data Strobe) go to a high impedance state after a delay which is equal to the CAS latency set in the mode register. The
burst stop command, however, is not supported during a write burst operation.
<Burst Length = 4, CAS Latency = 3 >
0
1
2
CL K
CL K
3
4
5
6
7
8
COMMAND
READ A
NOP
NOP
NOP
NOP
NOP
NOP
NOP
Burst Stop
CA S Lat en cy = 3
DQS
DQ's
Dout 0 Dout 1
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| M13S64164A-6TIG | 制造商:ESMT 制造商全稱:Elite Semiconductor Memory Technology Inc. 功能描述:1M x 16 Bit x 4 Banks Double Data Rate SDRAM |
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