Cypress manual Truth Table For SRAM Operations, PRELIMINARY CY14B101LA, CY14B101NA

PRELIMINARY CY14B101LA, CY14B101NA

Truth Table For SRAM Operations

HSB must remain HIGH for SRAM operations.

Table 3. Truth Table 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 (DQ0–DQ7);

Read

Active

L

H

H

High Z

Output Disabled

Active

L

L

X

Data in (DQ0–DQ7);

Write

Active

Table 4. Truth Table for x16 Configuration

CE

WE

OE

BHE

BLE

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 (DQ0–DQ15)

Read

Active

L

H

L

H

L

Data Out (DQ0–DQ7);

Read

Active

DQ8–DQ15in High-Z

L

H

L

L

H

Data Out (DQ8–DQ15);

Read

Active

DQ0–DQ7in High-Z

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 (DQ0–DQ15)

Write

Active

L

L

X

H

L

Data In (DQ0–DQ7);

Write

Active

DQ8–DQ15in High-Z

L

L

X

L

H

Data In (DQ8–DQ15);

Write

Active

DQ0–DQ7in High-Z

Document #: 001-42879 Rev. *B Page 15 of 25

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