CY7C1440KV33

CY7C1442KV33

CY7C1440KVE33

Document Number: 001-66676 Rev. *G

Page 12 of 33

Partial Truth Table for Read/Write

The partial truth table for read/write for CY7C1440KV33/CY7C1440KVE33 is as follows. [8, 9, 10]

Function (CY7C1440KV33/CY7C1440KVE33)

GW

BWE

Read

H

H

XX

XX

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

Partial Truth Table for Read/Write

The partial truth table for read/write for CY7C1442KV33 is as follows. [8, 9, 10]

Function (CY7C1442KV33)

GW

BWE

Read

H

H

X

X

Read

H

L

H

H

L

H

L

L

L

H

Write bytes B, A

H

L

L

L

Write all bytes

H

L

L

L

Write all bytes

L

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.