MT46V32M16 datasheet(4/91 Pages) MICRON

Part #	MT46V32M16

Description	512Mb: x4, x8, x16 DDR SDRAM Features

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Manufacturer	MICRON [Micron Technology]

Direct Link	http://www.micron.com

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Micron Technology, Inc., reserves the right to change products or specifications without notice.

DDR_x4x8x16_Core1.fm - 512Mb DDR: Rev. N; Core DDR Rev. B 2/09 EN

4

512Mb: x4, x8, x16 DDR SDRAM

State Diagram

Figure 2:

Simplified State Diagram

Note:

This diagram represents operations within a single bank only and does not capture concur-

rent operations in other banks.

Power

on

Power

applied

REFS

LMR

REFA

REFSX

ACT

CKE LOW

CKEL

CKE HIGH

CKEH

PRE

Precharge

all banks

MR

EMR

Self

refresh

Idle

all banks

precharged

Row

active

Burst

stop

Read

Read A

Automatic sequence

Command sequence

Write

WRITE

Write A

WRITE A

Precharge

PREALL

Active

power-

down

Precharge

power-

down

Auto

refresh

PRE

WRITE A

READ A

PRE

READ A

READ

BST

ACT = ACTIVE

BST = BURST TERMINATE

CKEH = Exit power-down

CKEL = Enter power-down

EMR = Extended mode register

LMR = LOAD MODE REGISTER

MR = Mode register

PRE = PRECHARGE

PREALL = PRECHARGE all banks

READ A = READ with auto precharge

REFA = AUTO REFRESH

REFS = Enter self refresh

REFSX = Exit self refresh

WRITE A = WRITE with auto precharge

PRE

LMR

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