MT48LC8M32B2 View Datasheet(PDF) - Micron Technology

Part Name

Description

Manufacturer

MT48LC8M32B2

SYNCHRONOUS DRAM

Micron Technology 

TABLE OF CONTENTS

Functional Block Diagram - 8 Meg x 32 ................. 5

Pin Descriptions ........................................................... 6

Functional Description .......................................... 9

Initialization ........................................................... 9

Register Definition ................................................. 9

Mode Register ................................................... 9

Burst Length ................................................ 9

Burst Type .................................................... 10

CAS Latency ................................................ 11

Operating Mode ......................................... 11

Write Burst Mode ....................................... 11

Commands .................................................................. 12

Truth Table 1 (Commands and DQM Operation) ........... 12

Command Inhibit ................................................. 13

No Operation (NOP) ............................................ 13

Load Mode Register ............................................... 13

Active ....................................................................... 13

Read ....................................................................... 13

Write ....................................................................... 13

Precharge ................................................................. 13

Auto Precharge ....................................................... 13

Burst Terminate ...................................................... 14

Auto Refresh ........................................................... 14

Self Refresh .............................................................. 14

Operation .................................................................... 15

Bank/Row Activation ........................................... 15

Reads ....................................................................... 16

Writes ....................................................................... 22

Precharge ................................................................. 24

Power-Down .......................................................... 24

Clock Suspend ........................................................ 25

Burst Read/Single Write ........................................ 25

Concurrent Auto Precharge ................................. 26

Write With Auto Precharge ................................. 27

PRELIMINARY

256Mb: x32

SDRAM

Truth Table 2 (CKE) ..................................................... 28

Truth Table 3 (Current State, Same Bank) ...................... 29

Truth Table 4 (Current State, Different Bank) ................. 31

Absolute Maximum Ratings ...................................... 33

DC Electrical Characteristics

and Operating Conditions ......................................... 33

IDD Specifications and Conditions ........................... 33

Capacitance .................................................................. 34

AC Electrical Characteristics (Timing Table) ..... 34

AC Functional Characteristics ............................ 35

Timing Waveforms

Initialize and Load Mode Register ...................... 37

Power-Down Mode ............................................... 38

Clock Suspend Mode ............................................ 39

Auto Refresh Mode ............................................... 40

Self Refresh Mode .................................................. 41

Reads

Read – Single Read ........................................... 42

Read – Without Auto Precharge ................... 43

Read – With Auto Precharge .......................... 44

Alternating Bank Read Accesses ..................... 45

Read – Full-Page Burst ..................................... 46

Read – DQM Operation ................................. 47

Writes

Write – Single Write ......................................... 48

Write – Without Auto Precharge .................. 49

Write – With Auto Precharge ........................ 50

Alternating Bank Write Accesses ................... 51

Write – Full-Page Burst .................................... 52

Write – DQM Operation ................................ 53

Package

86-Pin TSOP ...................................................... 54

90-Ball FBGA .................................................... 55

09005aef80cd8e48

256MbSDRAMx32.p65 – Rev. B; Pub. 03/04

4

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

©2003 Micron Technology, Inc.

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