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CY7C1241V18, CY7C1256V18
CY7C1243V18, CY7C1245V18
Document Number: 001-06365 Rev. *D Page 12 of 28
Write Cycle Descriptions
The write cycle description table for CY7C1245V18 follows.
[2, 10]
BWS
0
BWS
1
BWS
2
BWS
3
K K Comments
LLLLL–H–During the data portion of a write sequence, all four bytes (D
[35:0]
) are written
into the device.
LLLL–L–HDuring the data portion of a write sequence, all four bytes (D
[35:0]
) are written
into the device.
L H H H L–H – During the data portion of a write sequence, only the lower byte (D
[8:0]
) is
written into the device. D
[35:9]
remains unaltered.
L H H H – L–H During the data portion of a write sequence, only the lower byte (D
[8:0]
) is
written into the device. D
[35:9]
remains unaltered.
H L H H L–H – During the data portion of a write sequence, only the byte (D
[17:9]
) is written
into the device. D
[8:0]
and D
[35:18]
remain unaltered.
H L H H – L–H During the data portion of a write sequence, only the byte (D
[17:9]
) is written
into the device. D
[8:0]
and D
[35:18]
remain unaltered.
H H L H L–H – During the data portion of a write sequence, only the byte (D
[26:18]
) is written
into the device. D
[17:0]
and D
[35:27]
remain unaltered.
H H L H – L–H During the data portion of a write sequence, only the byte (D
[26:18]
) is written
into the device. D
[17:0]
and D
[35:27]
remain unaltered.
H H H L L–H – During the data portion of a write sequence, only the byte (D
[35:27]
) is written
into the device. D
[26:0]
remains unaltered.
H H H L – L–H During the data portion of a write sequence, only the byte (D
[35:27]
) is written
into the device. D
[26:0]
remains unaltered.
HHHHL–H–No data is written into the device during this portion of a write operation.
HHHH–L–HNo data is written into the device during this portion of a write operation.
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