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參數(shù)資料
| 型號： | V54C365164VCT8PC |
| 廠商： | MOSEL-VITELIC |
| 元件分類： | DRAM |
| 英文描述： | 4M X 16 SYNCHRONOUS DRAM, 6 ns, PDSO54 |
| 封裝： | 0.400 INCH, PLASTIC, TSOP2-54 |
| 文件頁數(shù)： | 53/54頁 |
| 文件大?。?/td> | 1570K |
| 代理商： | V54C365164VCT8PC |
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MOSEL VITELIC
V54C365164VC
8
V54C365164VC Rev. 0.8 July 2001
Burst Length and Sequence:
Refresh Mode
SDRAM has two refresh modes, Auto Refresh
and Self Refresh. Auto Refresh is similar to the CAS
-before-RAS refresh of conventional DRAMs. All of
banks must be precharged before applying any re-
fresh mode. An on-chip address counter increments
the word and the bank addresses and no bank infor-
mation is required for both refresh modes.
The chip enters the Auto Refresh mode, when
RAS and CAS are held low and CKE and WE are
held high at a clock timing. The mode restores word
line after the refresh and no external precharge
command is necessary. A minimum tRC time is re-
quired between two automatic refreshes in a burst
refresh mode. The same rule applies to any access
command after the automatic refresh operation.
The chip has an on-chip timer and the Self Re-
fresh mode is available. It enters the mode when
RAS, CAS, and CKE are low and WE is high at a
clock timing. All of external control signals including
the clock are disabled. Returning CKE to high en-
ables the clock and initiates the refresh exit opera-
tion. After the exit command, at least one tRC delay
is required prior to any access command.
DQM Function
DQM has two functions for data I/O read and
write operations. During reads, when it turns to
“high” at a clock timing, data outputs are disabled
and become high impedance after two clock delay
(DQM Data Disable Latency tDQZ ). It also provides
a data mask function for writes. When DQM is acti-
vated, the write operation at the next clock is prohib-
ited (DQM Write Mask Latency tDQW = zero clocks).
Suspend Mode
During normal access mode, CKE is held high en-
abling the clock. When CKE is low, it freezes the in-
ternal clock and extends data read and write
operations. One clock delay is required for mode
entry and exit (Clock Suspend Latency tCSL).
Power Down
In order to reduce standby power consumption, a
power down mode is available. All banks must be
precharged and the necessary Precharge delay
(trp) must occur before the SDRAM can enter the
Power Down mode. Once the Power Down mode is
initiated by holding CKE low, all of the receiver cir-
cuits except CLK and CKE are gated off. The Power
Down mode does not perform any refresh opera-
tions, therefore the device can’t remain in Power
Down mode longer than the Refresh period (tref) of
the device. Exit from this mode is performed by tak-
ing CKE “high”. One clock delay is required for
mode entry and exit.
Auto Precharge
Two
methods
are
available
to
precharge
SDRAMs. In an automatic precharge mode, the
CAS timing accepts one extra address, CA10, to
determine whether the chip restores or not after the
Burst
Length
Starting Address
(A2 A1 A0)
Sequential Burst Addressing
(decimal)
Interleave Burst Addressing
(decimal)
2
xx0
xx1
0, 1
1, 0
0, 1
1, 0
4x00
x01
x10
x11
0, 1, 2, 3
1, 2, 3, 0
2, 3, 0, 1
3, 0, 1, 2
0, 1, 2, 3
1, 0, 3, 2
2, 3, 0, 1
3, 2, 1, 0
8
000
001
010
011
100
101
110
111
0
1
2
3
4
5
6
7
1
2
3
4
5
6
7
0
2
3
4
5
6
7
0
1
3
4
5
6
7
0
1
2
4
5
6
7
0
1
2
3
5
6
7
0
1
2
3
4
6
7
0
1
2
3
4
5
7
0
1
2
3
4
5
6
0
1
2
3
4
5
6
7
1
0
3
2
5
4
7
6
2
3
0
1
6
7
4
5
3
2
1
0
7
6
5
4
5
6
7
0
1
2
3
5
4
7
6
1
0
3
2
6
7
4
5
2
3
0
1
7
6
5
4
3
2
1
0
Full
Page
nnn
Cn, Cn+1, Cn+2,.....
not supported
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相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| V54C365164VD | 制造商:MOSEL 制造商全稱:MOSEL 功能描述:HIGH PERFORMANCE 225/200/166/143 MHz 3.3 VOLT 4M X 16 SYNCHRONOUS DRAM 4 BANKS X 1Mbit X 16 |
| V54C365324V | 制造商:MOSEL 制造商全稱:MOSEL 功能描述:200/183/166/143 MHz 3.3 VOLT ULTRA HIGH PERFORMANCE 2M X 32 SDRAM 4 BANKS X 512Kbit X 32 |
| V54C365404VD | 制造商:MOSEL 制造商全稱:MOSEL 功能描述:HIGH PERFORMANCE 143/133/125 MHz 3.3 VOLT 16M X 4 SYNCHRONOUS DRAM 4 BANKS X 4Mbit X 4 |
| V54C365804VC | 制造商:MOSEL 制造商全稱:MOSEL 功能描述:HIGH PERFORMANCE 143/133/125 MHz 3.3 VOLT 8M X 8 SYNCHRONOUS DRAM 4 BANKS X 2Mbit X 8 |
| V54C365804VD | 制造商:MOSEL 制造商全稱:MOSEL 功能描述:HIGH PERFORMANCE 143/133/125 MHz 3.3 VOLT 8M X 8 SYNCHRONOUS DRAM 4 BANKS X 2Mbit X 8 |
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