IS42S32400E Ver la hoja de datos (PDF) - Integrated Silicon Solution

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componentes Descripción

Fabricante

IS42S32400E

4M x 32 128Mb SYNCHRONOUS DRAM

Integrated Silicon Solution 

IS42S32400E, IS45S32400E

Initialize and Load Mode Register(1)

CLK

T0

tCK

tCKS tCKH

CKE

tCMH tCMS

COMMAND NOP

T1

tCMH tCMS

PRECHARGE

Tn+1

tCH

tCMH tCMS

AUTO

REFRESH

DQM0-DQM3

To+1

tCL

NOP

AUTO

REFRESH

A0-A9, A11

A10

BA0, BA1

ALL BANKS

SINGLE BANK

ALL BANKS

Tp+1

Tp+2

Tp+3

NOP

Load MODE

REGISTER

NOP

ACTIVE

tAS tAH

CODE

tAS tAH

CODE

tAS tAH

CODE

ROW

ROW

BANK

DQ

T

Power-up: VCC

and CLK stable

T = 100µs Min.

tRP

tRC

Precharge AUTO REFRESH

all banks

tRC

AUTO REFRESH

tMRD

Program MODE REGISTER(2, 3, 4)

DON'T CARE

Notes:

1. If CS is High at clock High time, all commands applied are NOP.

2. The Mode register may be loaded prior to the Auto-Refresh cycles if desired.

3. JEDEC and PC100 specify three clocks.

4. Outputs are guaranteed High-Z after the command is issued.

20

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

Rev.  D

05/18/09

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