Cypress manual Write Descriptions CY7C1303BV25 2, Write Descriptions CY7C1306BV25 2, Comments

CY7C1303BV25

CY7C1306BV25

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. BWS0, BWS1, in the case of CY7C1303BV25 and also BWS2 and BWS3 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

Document #: 38-05627 Rev. *A Page 7 of 19

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