CY7C1310AV18
CY7C1312AV18
CY7C1314AV18
PRELIMINARY
Document #: 38-05497 Rev. *A
Page 8 of 21
Write Cycle Descriptions
(CY7C1310AV18 and CY7C1312AV18)
[2, 8]
BWS
0
BWS
1
K
K
Comments
L
L
L-H
–
During the Data portion of a Write sequence
:
CY7C1310AV18
−
both nibbles (D
[7:0]
) are written into the device,
CY7C1312AV18
−
both bytes (D
[17:0]
) are written into the device.
L
L
–
L-H During the Data portion of a Write sequence
:
CY7C1310AV18
−
both nibbles (D
[7:0]
) are written into the device,
CY7C1312AV18
−
both bytes (D
[17:0]
) are written into the device.
L
H
L-H
–
During the Data portion of a Write sequence
:
CY7C1310AV18
−
only the lower nibble (D
[3:0]
) is written into the device. D
[7:4]
will remain unaltered,
CY7C1312AV18
−
only the lower byte (D
[8:0]
) is written into the device. D
[17:9]
will remain unaltered.
L
H
–
L-H During the Data portion of a Write sequence
:
CY7C1310AV18
−
only the lower nibble (D
[3:0]
) is written into the device. D
[7:4]
will remain unaltered,
CY7C1312AV18
−
only the lower byte (D
[8:0]
) is written into the device. D
[17:9]
will remain unaltered.
H
L
L-H
–
During the Data portion of a Write sequence
:
CY7C1310AV18
−
only the upper nibble (D
[7:4]
) is written into the device. D
[3:0]
will remain unaltered,
CY7C1312AV18
−
only the upper byte (D
[17:9]
) is written into the device. D
[8:0]
will remain unaltered.
H
L
–
L-H During the Data portion of a Write sequence
:
CY7C1310AV18
−
only the upper nibble (D
[7:4]
) is written into the device. D
[3:0]
will remain unaltered,
CY7C1312AV18
−
only the upper byte (D
[17:9]
) is written into the device. D
[8:0]
will remain unaltered.
H
H
L-H
–
No data is written into the devices during this portion of a write operation.
H
H
–
L-H No data is written into the devices during this portion of a write operation.
Write Cycle Descriptions
(CY7C1314AV18)
[2, 8]
BWS
0
BWS
1
BWS
2
BWS
3
K
K
Comments
L
L
L
L
L-H
-
During the Data portion of a Write sequence, all four bytes (D
[35:0]
) are written into
the device.
L
L
L
L
-
L-H During 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]
will remain 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]
will 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]
will 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]
will 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]
will 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]
will 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]
will 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]
will remain unaltered.
H
H
H
H
L-H
-
No data is written into the device during this portion of a write operation.
H
H
H
H
-
L-H No data is written into the device during this portion of a write operation.
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