Rev. 1.0 / May 2007

8

HY5DU121622D(L)TP

SIMPLIFIED COMMAND TRUTH TABLE

Command

CKEn-1

CKEn

CS

RAS

CAS

WE

ADDR

A10

/AP

BA

Note

Extended Mode Register

Set

H

X

LLLL

OP code

1,2

Mode Register Set

H

X

LLLL

OP code

1,2

Device Deselect

HX

H

XXX

X1

No Operation

L

HHH

Bank Active

H

X

L

L

H

H

RA

V

1

Read

H

X

LHLH

CA

L

V

1

Read with Autoprecharge

H

1,3

Write

HX

L

H

L

L

CA

L

V

1

Write with Autoprecharge

H

1,4

Precharge All Banks

HX

L

L

H

L

X

HX

1,5

Precharge selected Bank

LV

1

Read Burst Stop

H

X

L

H

H

L

X

1

Auto Refresh

H

H

LLL

H

X

1

Self Refresh

Entry

H

L

LLL

H

X

1

Exit

L

H

H

XXX

1

L

HHH

Precharge

Power Down

Mode

Entry

H

L

H

XXX

X

1

L

HHH

1

Exit

L

H

H

XXX

1

L

HHH

1

Active Power

Down Mode

Entry

H

L

H

XXX

X

1

L

VVV

1

Exit

L

H

X

1

( H=Logic High Level, L=Logic Low Level, X=Don’t Care, V=Valid Data Input, OP Code=Operand Code, NOP=No Operation )