CY7C1440AV33

Document Number: 38-05383 Rev. *K

Page 10 of 33

Truth Table for Read/Write

The truth table for Read/Write for CY7C1440AV33 follows. [8, 9, 10]

Function (CY7C1440AV33)

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

LLL

LL

Write all bytes

L

X

X

X

X

X

Notes

8. 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.