CY7C1518AV18 CYPRESS [Cypress Semiconductor], CY7C1518AV18 Datasheet - Page 10

• Manufacturer Part Number: CY7C1518AV18
• Description: 72-Mbit DDR-II SRAM Two-Word Burst Architecture
• Manufacturer: CYPRESS [Cypress Semiconductor]

Write Cycle Descriptions
The following table represents the write cycle description for the part, CY7C1520AV18.
Notes
Document Number: 001-06982 Rev. *I
9. X = “Do not Care,” H = Logic HIGH, L = Logic LOW, 
10. Is based on a write cycle that was initiated in accordance with the
BWS
H
H
H
H
H
H
H
H
of a write cycle, as long as the setup and hold requirements are achieved.
L
L
L
L
0
BWS
H
H
H
H
H
H
H
H
L
L
L
L
1
BWS
H
H
H
H
H
H
H
H
L
L
L
L
2
BWS
H
H
H
H
H
H
H
H
L
L
L
L
3
L–H
L–H
L–H
L–H
L–H
L–H
K
–
–
–
–
–
–
L–H During the data portion of a write sequence, all four bytes (D
L–H During the data portion of a write sequence, only the lower byte (D
L–H During the data portion of a write sequence, only the byte (D
L–H During the data portion of a write sequence, only the byte (D
L–H During the data portion of a write sequence, only the byte (D
L–H No data is written into the device during this portion of a write operation.
K
–
–
–
–
–
–

represents rising edge.
During the data portion of a write sequence, all four bytes (D
the device.
the device.
During the data portion of a write sequence, only the lower byte (D
into the device. D
into the device. D
During the data portion of a write sequence, only the byte (D
device. D
device. D
During the data portion of a write sequence, only the byte (D
the device. D
the device. D
During the data portion of a write sequence, only the byte (D
the device. D
the device. D
No data is written into the device during this portion of a write operation.
Write Cycle Descriptions
[8:0]
[8:0]
[17:0]
[17:0]
[26:0]
[26:0]
and D
and D
[35:9]
[35:9]
and D
and D
remains unaltered.
remains unaltered.
[35:18]
[35:18]
remains unaltered.
remains unaltered.
[35:27]
[35:27]
table. BWS
remains unaltered.
remains unaltered.
remains unaltered.
remains unaltered.
0
, BWS
Comments
[9, 10]
1
, BWS
2
, and BWS
3
can be altered on different portions
CY7C1518AV18
CY7C1520AV18
[17:9]
[17:9]
[35:0]
[35:0]
[26:18]
[26:18]
[35:27]
[35:27]
) is written into the
) is written into the
) are written into
) are written into
) is written into
) is written into
) is written into
) is written into
[8:0]
[8:0]
Page 10 of 29
) is written
) is written
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