eorex

EM42AM3284LBA

Jul. 2006

www.eorex.com

3. Operative Command Table (Continued)

Current State

/CS

/R

/C

/W

Addr.

Command

Action

H

X

X

X

X

DESL

NOP

L

H

H

H

X

NOP

NOP

L

H

H

L

X

TERM

NOP

L

H

L

H

BA/CA/A10

READ

ILLEGAL

(Note 1)

L

H

L

L

BA/CA/A10

WRIT/WRITA

New write, Determine AP

L

L

H

H

BA/RA

ACT

ILLEGAL

(Note 1)

L

L

H

L

BA/A10

PRE/PREA

ILLEGAL

(Note 1)

L

L

L

H

X

REFA

ILLEGAL

Write

Recovering

L

L

L

L

Op-Code,

Mode-Add

MRS

ILLEGAL

H

X

X

X

X

DESL

L

H

H

H

X

NOP

L

H

H

L

X

TERM

NOP

L

H

L

X

BA/CA/A10

READ/WRIT

ILLEGAL

L

L

H

H

BA/RA

ACT

ILLEGAL

L

L

H

L

BA/A10

PRE/PREA

L

L

L

H

X

REFA

ILLEGAL

Refreshing

L

L

L

L

Op-Code,

Mode-Add

MRS

ILLEGAL

Remark H = High level, L = Low level, X = High or Low level (Don't care), AP = Auto Pre-charge

Note 1: ILLEGAL to bank in specified states;

Function may be legal in the bank indicated by Bank Address (BA), depending on the state of

that bank.

Note 2: Must satisfy bus contention, bus turn around, and/or write recovery requirements.

Note 3: NOP to bank precharging or in idle state.May precharge bank indicated by BA.

Note 4: ILLEGAL of any bank is not idle.

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