PRELIMINARY
CY7C1513V18
CY7C1526V18
CY7C1511V18
CY7C1515V18
Document #: 38-05363 Rev. *A
Page 10 of 23
L
H
L–H
– During the Data portion of a Write sequence
:
CY7C1511V18
− only the lower nibble (D[3:0]) is written into the device. D[7:4] will remain
unaltered,
CY7C1513V18
− 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
:
CY7C1511V18
− only the lower nibble (D[3:0]) is written into the device. D[7:4] will remain
unaltered,
CY7C1513V18
− 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
:
CY7C1511V18
− only the upper nibble (D[7:4]) is written into the device. D[3:0] will
remain unaltered,
CY7C1513V18
− 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
:
CY7C1511V18
− only the upper nibble (D[7:4]) is written into the device. D[3:0] will
remain unaltered,
CY7C1513V18
− 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[2, 10](CY7C1515V18)
BWS0 BWS1 BWS2 BWS3
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.
HHHH
L–H
–
No data is written into the device during this portion of a write operation.
HHHH
–
L–H No data is written into the device during this portion of a write operation.
Write Cycle Descriptions[2, 10] (CY7C1526V18)
BWS0
KK
L
L–H
–
During the Data portion of a Write sequence, the single byte (D[8:0]) is written
into the device.
L
–
L–H During the Data portion of a Write sequence, the single byte (D[8:0]) is written
into the device.
H
L–H
–
No data is written into the device during this portion of a write operation.
H
–
L–H No data is written into the device during this portion of a write operation.
Write Cycle Descriptions CY7C1511V18 and CY7C1526V18) (continued)[2, 10]
BWS0/NWS0 BWS1/NWS1
KK
Comments