PRELIMINARY
CY7C1410BV18
CY7C1425BV18
CY7C1412BV18
CY7C1414BV18
Document #: 001-07036 Rev. *B
Page 10 of 26
Write Cycle Descriptions (CY7C1410BV18 and CY7C1412BV18) [2, 8]
BWS0/NWS0
BWS1/NWS1
KK
Comments
L
L
L-H
–
During the Data portion of a Write sequence
:
CY7C1410BV18
− both nibbles (D
[7:0]) are written into the device,
CY7C1412BV18
− both bytes (D
[17:0]) are written into the device.
L
L
–
L-H
During the Data portion of a Write sequence
:
CY7C1410BV18
− both nibbles (D
[7:0]) are written into the device,
CY7C1412BV18
− both bytes (D
[17:0]) are written into the device.
L
H
L-H
–
During the Data portion of a Write sequence
:
CY7C1410BV18
− only the lower nibble (D
[3:0]) is written into the device.
D[7:4] will remain unaltered,
CY7C1412BV18
− 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
:
CY7C1410BV18
− only the lower nibble (D
[3:0]) is written into the device.
D[7:4] will remain unaltered,
CY7C1412BV18
− 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
:
CY7C1410BV18
− only the upper nibble (D
[7:4]) is written into the device.
D[3:0] will remain unaltered,
CY7C1412BV18
− 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
:
CY7C1410BV18
− only the upper nibble (D
[7:4]) is written into the device.
D[3:0] will remain unaltered,
CY7C1412BV18
− 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 (CY7C1425BV18) [2, 8]
BWS0
KK
Comments
L
L-H
–
During the Data portion of a Write sequence
:
CY7C1425BV18 - the single byte (D[8:0]) is written into the device
L
–
L-H
During the Data portion of a Write sequence
:
CY7C1425BV18 - 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.
Note:
8. Assumes a Write cycle was initiated per the Write Port Cycle Description Truth Table. NWS0, NWS1, BWS0, BWS1, BWS2 and BWS3 can be altered on different
portions of a Write cycle, as long as the set-up and hold requirements are achieved.
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