參數(shù)資料
型號(hào): CY7C1418BV18-278BZXC
廠商: CYPRESS SEMICONDUCTOR CORP
元件分類: DRAM
英文描述: 36-Mbit DDR-II SRAM 2-Word Burst Architecture
中文描述: 2M X 18 DDR SRAM, 0.45 ns, PBGA165
封裝: 15 X 17 MM, 1.40 MM HEIGHT, LEAD FREE, MO-216, FBGA-165
文件頁(yè)數(shù): 10/28頁(yè)
文件大?。?/td> 1132K
代理商: CY7C1418BV18-278BZXC
PRELIMINARY
CY7C1416BV18
CY7C1427BV18
CY7C1418BV18
CY7C1420BV18
Document Number: 001-07033 Rev. *B
Page 10 of 28
Write Cycle Descriptions
(CY7C1416BV18 and CY7C1427BV18)
[2, 8]
BWS
0
,NWS
0
L
BWS
1
,NWS
1
L
K
K
Comments
L-H
During the Data portion of a Write sequence
:
CY7C1416BV18
both nibbles (D
[7:0]
) are written into the device,
CY7C1427BV18
both bytes (D
[17:0]
) are written into the device.
During the Data portion of a Write sequence
:
CY7C1416BV18
both nibbles (D
[7:0]
) are written into the device,
CY7C1427BV18
both bytes (D
[17:0]
) are written into the device.
During the Data portion of a Write sequence
:
CY7C1416BV18
only the lower nibble (D
[3:0]
) is written into the device. D
[7:4]
will remain unaltered,
CY7C1427BV18
only the lower byte (D
[8:0]
) is written into the device. D
[17:9]
will remain unaltered.
During the Data portion of a Write sequence
:
CY7C1416BV18
only the lower nibble (D
[3:0]
) is written into the device. D
[7:4]
will remain unaltered,
CY7C1427BV18
only the lower byte (D
[8:0]
) is written into the device. D
[17:9]
will remain unaltered.
During the Data portion of a Write sequence
:
CY7C1416BV18
only the upper nibble (D
[7:4]
) is written into the device. D
[3:0]
will remain unaltered,
CY7C1427BV18
only the upper byte (D
[17:9]
) is written into the device. D
[8:0]
will remain unaltered.
During the Data portion of a Write sequence
:
CY7C1416BV18
only the upper nibble (D
[7:4]
) is written into the device. D
[3:0]
will remain unaltered,
CY7C1427BV18
only the upper byte (D
[17:9]
) is written into the device. D
[8:0]
will remain unaltered.
No data is written into the devices during this portion of a Write operation.
No data is written into the devices during this portion of a Write operation.
L
L
L-H
L
H
L-H
L
H
L-H
H
L
L-H
H
L
L-H
H
H
H
H
L-H
L-H
Write Cycle Descriptions
(CY7C1420BV18)
[2, 8]
BWS
0
L
K
K
Comments
L-H
During the Data portion of a Write sequence
,
the single byte (D
[8:0]
) is written into the device.
During the Data portion of a Write sequence
,
the single byte (D
[8:0]
) is written into the device.
No data is written into the device during this portion of a Write operation.
No data is written into the device during this portion of a Write operation.
L
L-H
H
H
L-H
L-H
Note:
8. Assumes a Write cycle was initiated per the Write Port Cycle Description Truth Table. NWS
0
, NWS
1
, BWS
0
, BWS
1
, BWS
2
,
and BWS
3
can be altered on different
portions of a Write cycle, as long as the set-up and hold requirements are achieved.
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CY7C1418BV18-278BZXI 36-Mbit DDR-II SRAM 2-Word Burst Architecture
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