Command

$\overline{\text{CS}}$

$\overline{\text{RAS}}$

$\overline{\text{CAS}}$

$\overline{\text{WE}}$

DQM

ADD

Command Inhibit

H

X

X

X

X

X

No Operation

L

H

H

H

X

X

Activate

L

L

H

H

X

Bank/Row

Read

L

H

L

H

X

Bank/Col

Write

L

H

L

L

X

Bank/Col

Burst Terminate

L

H

H

L

X

X

Precharge

L

L

H

L

X

code

Refresh

L

L

L

H

X

X

Load Mode Register

L

L

L

L

X

Opcode

Write Enable/Output Enable

-

-

-

-

L

-

Write Inhibit/Output High-Z

-

-

-

-

H

-