Cypress CY7C1312AV18 - Manual (Page 8)

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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