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Cypress CY7C1303BV25 User Manual

Page 7

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CY7C1306BV25

CY7C1303BV25

Document #: 38-05627 Rev. *A

Page 7 of 19

Write Descriptions (CY7C1303BV25)

[2, 8]

BWS

0

BWS

1

K

K

Comments

L

L

L-H

-

During the Data portion of a Write sequence, both bytes (D

[17:0]

) are written into the device.

L

L

-

L-H

During the Data portion of a Write sequence, both bytes (D

[17:0]

) are written into the device.

L

H

L-H

-

During the Data portion of a Write sequence, only the lower byte (D

[8:0]

) is written into the

device. D

[17:9]

remains unaltered.

L

H

-

L-H

During the Data portion of a Write sequence, only the lower byte (D

[8:0]

) is written into the

device. D

[17:9]

remains unaltered.

H

L

L-H

-

During the Data portion of a Write sequence, only the byte (D

[17:9]

) is written into the device.

D

[8:0]

remains unaltered.

H

L

-

L-H

During the Data portion of a Write sequence, only the byte (D

[17:9]

) is written into the device.

D

[8:0]

remains unaltered.

H

H

L-H

-

No data is written into the device during this portion of a write operation.

H

H

-

L-H

No data is written into the device during this portion of a write operation.

Write Descriptions (CY7C1306BV25)

[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.

Note:

8. Assumes a Write cycle was initiated per the Write Port Cycle Description Truth Table. BWS

0

, BWS

1

, in the case of CY7C1303BV25 and also BWS

2

and BWS

3

in the case of CY7C1306BV25 can be altered on different portions of a write cycle, as long as the set-up and hold requirements are achieved. 38-05627

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