Cypress CY7C1141V18, CY7C1143V18 Write cycle descriptions of CY7C1145V18 follows.2, Device

CY7C1141V18, CY7C1156V18

CY7C1143V18, CY7C1145V18

The write cycle descriptions of CY7C1145V18 follows.[2, 10]

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] remains 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] remains 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] remains 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] remains 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] remains 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] remains 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] remains 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] remains 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.

Document Number: 001-06583 Rev. *D Page 12 of 28

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