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參數(shù)資料
| 型號： | μPD45128441 |
| 廠商： | NEC Corp. |
| 英文描述： | 128M-bit Synchronous DRAM(128M 同步DRAM) |
| 中文描述： | 128兆位同步DRAM（128M的同步DRAM）的 |
| 文件頁數(shù)： | 33/84頁 |
| 文件大?。?/td> | 693K |
| 代理商： | ΜPD45128441 |
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Preliminary Data Sheet
33
μ
PD45128441, 45128841, 45128163
12.2.2 Precharge Termination in WRITE Cycle
During a write cycle, the burst write operation is terminated by a precharge command.
When the precharge command is issued, the burst write operation is terminated and precharge starts.
The same bank can be activated again after t
RP
from the precharge command.
To issue a precharge command, t
RAS
must be satisfied.
When /CAS latency is 2, the write data written prior to the precharge command will be correctly stored. However,
invalid data may be written at the same clock as the precharge command. To prevent this from happening, DQM
must be high at the same clock as the precharge command. This will mask the invalid data.
When /CAS latency is 3, the write data written prior to the precharge command will be correctly stored. However,
invalid data may be written at the same clock as the precharge command. To prevent this from happening, DQM
must be high at the same clock as the precharge command. This will mask the invalid data.
Write
CLK
T0
T2
T1
T3
T4
T5
T6
T7
Burst length = X, /CAS latency = 2
DQ
Command
D1
D2
D3
ACT
DQM
t
RP
PRE
Hi-Z
D4
D5
(t
RAS
must be satisfied)
Write
CLK
T0
T2
T1
T3
T4
T5
T6
T7
Burst length = X, /CAS latency = 3
DQ
Command
D1
D2
D3
ACT
DQM
t
RP
PRE
Hi-Z
D5
T8
D4
(t
RAS
must be satisfied)
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相關(guān)代理商/技術(shù)參數(shù) |
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|---|---|
| PD45128441G5 | 制造商:ELPIDA 制造商全稱:Elpida Memory 功能描述:128M-bit Synchronous DRAM 4-bank, LVTTL WTR (Wide Temperature Range) |
| PD45128441G5-A10I-9JF | 制造商:ELPIDA 制造商全稱:Elpida Memory 功能描述:128M-bit Synchronous DRAM 4-bank, LVTTL WTR (Wide Temperature Range) |
| PD45128441G5-A10LI-9JF | 制造商:ELPIDA 制造商全稱:Elpida Memory 功能描述:128M-bit Synchronous DRAM 4-bank, LVTTL WTR (Wide Temperature Range) |
| PD45128441G5-A10LT-9JF | 制造商:ELPIDA 制造商全稱:Elpida Memory 功能描述:128M-bit Synchronous DRAM 4-bank, LVTTL WTR (Wide Temperature Range) |
| PD45128441G5-A10T-9JF | 制造商:ELPIDA 制造商全稱:Elpida Memory 功能描述:128M-bit Synchronous DRAM 4-bank, LVTTL WTR (Wide Temperature Range) |
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