EDW1032BBBG

Data Sheet E1771E11 (Ver. 1.1)

9

1.6

Commands

Table 6: Command Truth Table

Notes: 1.

H = logic high level; L = logic low level; X = Don’t Care. Signal may be H or L, but not floating.

2.

Addresses shown are logical addresses; physical addresses are inverted when address bus inversion (ABI) is

activated and /ABI=L.

3.

BA0-BA3 provide the Mode Register address (MRA), A0-A11 the opcode to be loaded.

4.

BA0-BA3 provide the bank address (BA), A0-A11 provide the row address (RA).

5.

BA0-BA3 provide the bank address, A0-A5 (A6) provide the column address (CA); no sub-word addressing within a

burst of 8.

6.

This command is REFRESH when /CKE(n) = L, and SELF-REFRESH ENTRY when /CKE(n) is H.

7.

BA0-BA3 and CA are used to select burst location (BST) and data, respectively.

8.

DESELECT and NO OPERATION are functionally interchangeable.

9.

In address training mode READ is decoded from the command pins only with /RAS = H, /CAS = L, /WE= H.

Operation

Code

/CKE

n-1

/CKE

n

/CS

/RAS /CAS /WE

BA3-

BA0

A11 A10 A8

A6-A7,

A9

A0-A5

(A6)

Note

DESELECT

DESEL

L

X

H

X

X

X

X

XXXX

X

2,8

NO OPERATION

(NOP)

NOP

L

X

L

H

H

H

X

XXXX

X

2,8

MODE REGISTER

SET

MRS

L

L

L

L

L

L

MRA

OPCODE

2,3

ACTIVATE

ACT

L

L

L

L

H

H

BA

RA

2,4

READ

RD

L

L

L

H

L

H

BA

L

L

L

X

CA

2,5,9

READ with

Autoprecharge

RDA

L

L

L

H

L

H

BA

L

L

H

X

CA

2,5

LOAD FIFO

LDFF

L

L

L

H

L

H

BST

H

L

L

DATA

2,7

READ TRAINING

RDTR

L

L

L

H

L

H

X

H

H

L

X

X

2

WRITE without Mask

WR

L

L

L

H

L

L

BA

L

L

L

X

CA

2,5

WRITE without Mask

with Autoprecharge

WRA

L

L

L

H

L

L

BA

L

L

H

X

CA

2,5

WRITE with Single

Byte Mask

WSM

L

L

L

H

L

L

BA

L

H

L

X

CA

2,5

WRITE with

Autoprecharge, Single

Byte Mask

WSMA

L

L

L

H

L

L

BA

L

HHX

CA

2,5

WRITE with Double

Byte Mask

WDM

L

L

L

H

L

L

BA

H

L

L

X

CA

2,5

WRITE with

Autoprecharge,

Double Byte Mask

WDMA

L

L

L

H

L

L

BA

HL

HX

CA

2,5

WRITE TRAINING

WRTR

L

L

L

H

L

L

X

H

H

L

X

X

2

PRECHARGE

PRE

L

L

L

L

H

L

BA

X

X

L

X

X

2

PRECHARGE ALL

PREALL L

L

L

L

H

L

X

X

X

H

X

X

2

REFRESH

REF

L

L

L

L

L

H

X

XXXX

X

6

POWER-DOWN-

ENTRY

PDE

L

H

H

X

X

X

X

XXXX

X

LH

H

H

POWER-DOWN-

EXIT

PDX

H

L

H

X

X

X

X

XXXX

X

LH

H

H

SELF-REFRESH-

ENTRY

SRE

L

H

L

L

L

H

X

XXXX

X

6

SELF-REFRESH-

EXIT

SRX

H

L

H

X

X

X

X

XXXX

X

LH

H

H