CY7C1410AV18
CY7C1425AV18
CY7C1412AV18
CY7C1414AV18
Document #: 38-05615 Rev. *C Page 10 of 25
L H – L-H During the Data portion of a Write sequence:
CY7C1410AV18 − only the lower nibble (D
[3:0]
) is written into the device. D
[7:4]
will
remain unaltered,
CY7C1412AV18 − 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:
CY7C1410AV18 − only the upper nibble (D
[7:4]
) is written into the device. D
[3:0]
will
remain unaltered,
CY7C1412AV18 − 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:
CY7C1410AV18 − only the upper nibble (D
[7:4]
) is written into the device. D
[3:0]
will
remain unaltered,
CY7C1412AV18 − 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
(CY7C1414AV18)
[2, 8]
BWS
0
BWS
1
BWS
2
BWS
3
KK 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.
Write Cycle Descriptions
(CY7C1425AV18)
BWS
0
KK Comments
L L-H – During the Data portion of a Write sequence:
CY7C1425AV18 - the single byte (D[8:0]) is written into the device
L – L-H During the Data portion of a Write sequence:
CY7C1425AV18 - the single byte (D[8:0]) is written into the device
H L-H – No data is written into the devices during this portion of a Write operation.
H – L-H No data is written into the devices during this portion of a Write operation.
Write Cycle Descriptions
(CY7C1410AV18 and CY7C1412AV18) (continued)
[2, 8]
BWS
0
/
NWS
0
BWS
1
/
NWS
1
KK
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