IS42S32400D View Datasheet(PDF) - Integrated Silicon Solution

Part Name

Description

Manufacturer

IS42S32400D

4Meg x 32 128-MBIT SYNCHRONOUS DRAM

Integrated Silicon Solution 

IS42S32400D

COMMAND TRUTH TABLE

CKE

A11

Function

n – 1 n CS RAS CAS WE BA1 BA0 A10 A9 - A0

Device deselect (DESL)

H× H

×

×

×

×

×

×

×

No operation (NOP)

H× L

H

H

H

×

×

×

×

Burst stop (BST)

Read

H× L

H

H

L

×

H× L

H

L

H

V

×

×

×

V

L

V

Read with auto precharge H × L

H

L

H

V

Write

H× L

H

L

L

V

Write with auto precharge H × L

H

L

L

V

V

H

V

V

L

V

V

H

V

Bank activate (ACT)

H× L

L

H

H

V

Precharge select bank (PRE) H × L

L

H

L

V

V

V

V

V

L

×

Precharge all banks (PALL) H × L

L

H

L

×

×

H

×

CBR Auto-Refresh (REF) H H L

L

L

H

×

Self-Refresh (SELF)

HL L

L

L

H

×

×

×

×

×

×

×

Mode register set (MRS)

H ×L

L

L

L

L

L

L

V

Note: H=VIH, L=VIL x= VIH or VIL, V = Valid Data.

DQM TRUTH TABLE

Function

Data write / output enable

Data mask / output disable

Upper byte write enable / output enable

Lower byte write enable / output enable

Upper byte write inhibit / output disable

Lower byte write inhibit / output disable

Note: H=VIH, L=VIL x= VIH or VIL, V = Valid Data.

CKE

n-1

n

H

×

H

×

H

×

H

×

H

×

H

×

DQM

U

L

L

L

H

H

L

×

×

L

H

×

×

H

Integrated Silicon Solution, Inc. — www.issi.com

7

Rev. F

03/03/09

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