Cypress CY7C1246V18 Manuel d'utilisateur Page 11

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CY7C1246V18, CY7C1257V18
CY7C1248V18, CY7C1250V18
Document Number: 001-06348 Rev. *D Page 11 of 27
Write Cycle Descriptions
The write cycle descriptions table for CY7C1250V18 follows.
[2, 8]
BWS
0
BWS
1
BWS
2
BWS
3
K K Comments
LLLLL-HDuring the data portion of a write sequence, all four bytes (D
[35:0]
) are written
into the device.
LLLLL-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-HNo data is written into the device during this portion of a write operation.
HHHHL-HNo data is written into the device during this portion of a write operation.
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