CY7C1416AV18
CY7C1427AV18
CY7C1418AV18
CY7C1420AV18
Document Number: 38-05616 Rev. *D
Page 10 of 28
Write Cycle Descriptions (CY7C1416AV18 and CY7C1427AV18)[2, 8]
BWS0,NWS0
BWS1,NWS1
KK
Comments
L
L
L-H
–
During the Data portion of a Write sequence
:
CY7C1416AV18
− both nibbles (D
[7:0]) are written into the device,
CY7C1427AV18
− both bytes (D
[17:0]) are written into the device.
L
L
–
L-H
During the Data portion of a Write sequence
:
CY7C1416AV18
− both nibbles (D
[7:0]) are written into the device,
CY7C1427AV18
− both bytes (D
[17:0]) are written into the device.
L
H
L-H
–
During the Data portion of a Write sequence
:
CY7C1416AV18
− only the lower nibble (D
[3:0]) is written into the device. D[7:4]
will remain unaltered,
CY7C1427AV18
− 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
:
CY7C1416AV18
− only the lower nibble (D
[3:0]) is written into the device. D[7:4]
will remain unaltered,
CY7C1427AV18
− 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
:
CY7C1416AV18
− only the upper nibble (D
[7:4]) is written into the device. D[3:0]
will remain unaltered,
CY7C1427AV18
− 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
:
CY7C1416AV18
− only the upper nibble (D
[7:4]) is written into the device. D[3:0]
will remain unaltered,
CY7C1427AV18
− 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.
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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