Rev. 1.0 / Mar. 2005

9

1

HY5DU12422C(L)TP

HY5DU12822C(L)TP

HY5DU121622C(L)TP

SIMPLIFIED COMMAND TRUTH TABLE

Command

CKEn-1

CKEn

CS

RAS

CAS

WE

ADDR

A10/AP

BA

H

X

LLL

L

OP code

H

X

LLL

L

OP code

HX

H

XXX

X

LH

H

H

HXL

L

H

H

RA

V

HXL

H

L

H

CA

L

V

H

HXL

H

L

L

CA

L

V

H

HXL

L

H

L

X

HX

LV

HXL

H

H

L

X

HHLLL

H

X

Entry

H

L

LLL

H

X

Exit

LH

H

XXX

LH

H

H

Precharge Power

Entry

HL

H

XXX

X

LH

H

H

Exit

LH

H

XXX

LH

H

H

Active Power

Entry

HL

H

XXX

X

L

VVV

Exit

L

H

X

Note:

1. LDM/UDM states are Don’t Care. Refer to below Write Mask Truth Table.

2. OP Code(Operand Code) consists of A0~A12 and BA0~BA1 used for Mode Register setting during Extended MRS or MRS.

Before entering Mode Register Set mode, all banks must be in a precharge state and MRS command can be issued after tRP

period from Precharge command.

3. If a Read with Autoprecharge command is detected by memory component in CK(n), then there will be no command presented

to activated bank until CK(n+BL/2+tRP).

4. If a Write with Autoprecharge command is detected by memory component in CK(n), then there will be no command presented

to activated bank until CK(n+BL/2+1+tWR+tRP). Write Recovery Time(tWR) is needed to guarantee that the last data has been

completely written.

5. If A10/AP is High when Precharge command being issued, BA0/BA1 are ignored and all banks are selected to be

precharged.

*For more information about Truth Table, refer to “Device Operation” section in Hynix website.

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