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Truth table for sram operations, For x8 configuration – Cypress CY14B104LA User Manual

Page 16

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PRELIMINARY

CY14B104LA, CY14B104NA

Document #: 001-49918 Rev. *A

Page 16 of 23

Truth Table For SRAM Operations

HSB should remain HIGH for SRAM Operations.

For x8 Configuration

CE

WE

OE

Inputs/Outputs

[2]

Mode

Power

H

X

X

High Z

Deselect/Power down

Standby

L

H

L

Data Out (DQ

0

–DQ

7

);

Read

Active

L

H

H

High Z

Output Disabled

Active

L

L

X

Data in (DQ

0

–DQ

7

);

Write

Active

For x16 Configuration

CE

WE

OE

BHE

[3]

BLE

[3]

Inputs/Outputs

[2]

Mode

Power

H

X

X

X

X

High-Z

Deselect/Power down

Standby

L

X

X

H

H

High-Z

Output Disabled

Active

L

H

L

L

L

Data Out (DQ

0

–DQ

15

)

Read

Active

L

H

L

H

L

Data Out (DQ

0

–DQ

7

);

DQ

8

–DQ

15

in High-Z

Read

Active

L

H

L

L

H

Data Out (DQ

8

–DQ

15

);

DQ

0

–DQ

7

in High-Z

Read

Active

L

H

H

L

L

High-Z

Output Disabled

Active

L

H

H

H

L

High-Z

Output Disabled

Active

L

H

H

L

H

High-Z

Output Disabled

Active

L

L

X

L

L

Data In (DQ

0

–DQ

15

)

Write

Active

L

L

X

H

L

Data In (DQ

0

–DQ

7

);

DQ

8

–DQ

15

in High-Z

Write

Active

L

L

X

L

H

Data In (DQ

8

–DQ

15

);

DQ

0

–DQ

7

in High-Z

Write

Active

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