CY7C1440KV25

Document Number: 001-94719 Rev. *D

Page 9 of 30

Truth Table for Read/Write

Function (CY7C1440KV25)

GW

BWE

Read

H

H

X

X

X

X

Read

H

L

HH

HH

L

H

H

H

L

L

H

H

L

H

Write Bytes B, A

H

L

H

H

L

L

L

H

L

H

H

Write Bytes C, A

H

L

H

L

H

L

Write Bytes C, B

H

L

H

L

L

H

Write Bytes C, B, A

H

L

H

L

L

L

L

L

H

H

H

Write Bytes D, A

H

L

L

H

H

L

Write Bytes D, B

H

L

L

H

L

H

Write Bytes D, B, A

H

L

L

H

L

L

Write Bytes D, C

H

L

L

L

H

H

Write Bytes D, C, A

H

L

L

L

H

L

Write Bytes D, C, B

H

L

L

L

L

H

Write All Bytes

H

L

L

L

L

L

Write All Bytes

L

X

X

X

X

X

Notes

7. The DQ pins are controlled by the current cycle and the OE signal. OE is asynchronous and is not sampled with the clock.

at the same time for any given write.