IS42S16800E View Datasheet(PDF) - Integrated Silicon Solution

Part Name

Description

Manufacturer

IS42S16800E

16M x 8, 8M x16 128Mb SYNCHRONOUS DRAM

Integrated Silicon Solution 

IS42S81600E, IS42S16800E

COMMAND TRUTH TABLE

Function

CKE

n – 1 n CS RAS CAS WE BA1 BA0 A10

Device deselect (DESL)

H×H

×

×

×

×

×

×

No operation (NOP)

H× L

H

H

H

×

×

×

Burst stop (BST)

H× L

H

H

L

×

×

×

Read

H× L

H

L

H

V

V

L

Read with auto precharge H × L

H

L

H

V

V

H

Write

H× L

H

L

L

V

V

L

Write with auto precharge H × L

H

L

L

V

V

H

Bank activate (ACT)

H× L

L

H

H

V

V

V

Precharge select bank (PRE) H × L

L

H

L

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

Note: H=Vih, L=Vil x= Vih or Vil, V = Valid Data.

A11

A9 - A0

×

×

×

V

V

V

V

V

×

×

×

×

V

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

8

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

Rev.  B

05/27/09

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