MT48LC32M8A2P-7ELIT(2005) 데이터 시트보기 (PDF) - Micron Technology

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MT48LC32M8A2P-7ELIT
(Rev.:2005)

256Mb: x4, x8, x16 SDRAM

Micron Technology 

Table of Contents

Functional Block Diagram – 64 Meg x 4 .................... 6

Functional Block Diagram – 32 Meg x 8 .................... 7

Functional Block Diagram – 16 Meg x 16 .................. 8

Pin Descriptions .......................................................... 10

Ball Descriptions .......................................................... 10

Functional Description ............................................... 12

Initialization ........................................................... 12

Register Definition ................................................ 12

Mode Register ................................................... 12

Burst Length ................................................ 12

Burst Type ................................................... 13

CAS Latency ................................................ 14

Operating Mode .......................................... 14

Write Burst Mode ........................................ 14

Commands ................................................................... 15

TruthTable1(CommandsandDQMOperation) .............. 15

Command Inhibit .................................................. 16

No Operation (NOP) .............................................. 16

Load mode register ................................................ 16

Active ....................................................................... 16

Read ....................................................................... 16

Write ....................................................................... 16

Precharge ................................................................ 16

Auto Precharge ....................................................... 16

Burst Terminate ..................................................... 17

Auto Refresh ........................................................... 17

Self Refresh ............................................................. 17

Operation ..................................................................... 18

Bank/Row Activation ............................................. 18

Reads ....................................................................... 19

Writes ....................................................................... 25

Precharge ................................................................ 27

Power-Down ........................................................... 27

Clock Suspend ........................................................ 28

Burst Read/Single Write ....................................... 28

256Mb: x4, x8, x16

SDRAM

Concurrent Auto Precharge ................................. 29

TruthTable2(CKE) ...................................................... 31

Truth Table 3 (Current State, Same Bank) ........................ 32

Truth Table 4 (Current State, Different Bank) .................. 34

Absolute Maximum Ratings ....................................... 36

DC Electrical Characteristics

and Operating Conditions ....................................... 36

IDD Specifications and Conditions ............................. 36

Capacitance .................................................................. 37

Electrical Characteristics

and Recommended AC Operating Conditions ....... 37

AC Electrical Characteristics (Timing Table) ......... 38

Timing Waveforms

Initialize and Load mode register ........................ 40

Power-Down Mode ................................................ 41

Clock Suspend Mode ............................................ 42

Auto Refresh Mode ................................................ 43

Self Refresh Mode .................................................. 44

Reads

Read – Without Auto Precharge ..................... 45

Read – With Auto Precharge ........................... 46

Single Read – Without Auto Precharge ......... 47

Single Read – With Auto Precharge ............... 48

Alternating Bank Read Accesses .................... 49

Read – Full-Page Burst .................................... 50

Read – DQM Operation ................................... 51

Writes

Write – Without Auto Precharge ..................... 52

Write – With Auto Precharge ........................... 53

Single Write - Without Auto Precharge ......... 54

Single Write - With Auto Precharge ................ 55

Alternating Bank Write Accesses ................... 56

Write – Full-Page Burst .................................... 57

Write – DQM Operation ................................... 58

PDF: 09005aef8091e6d1/Source: 09005aef8091e6a8

256MSDRAM.pmd – Rev. H; Pub. 2/05

5

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