64Mb: x32
SDRAM
TABLEOFCONTENTS
Functional Block Diagram - 2 Meg x 32 .................
Pin Descriptions .....................................................
4
5
Concurrent Auto Precharge .............................. 23
Write with Auto Precharge ............................... 24
Truth Table 2 (CKE) ................................................ 25
Truth Table 3 (Current State, Same Bank) ..................... 26
Truth Table 4 (Current State, Different Bank) ................. 28
Absolute Maximum Ratings .................................. 30
DCElectricalCharacteristics
and Operating Conditions...................................... 30
IDD Specifications and Conditions ......................... 30
Capacitance ............................................................ 32
Functional Description.........................................
Initialization ......................................................
Register Definition ............................................
Mode Register ...............................................
Burst Length............................................
Burst Type ...............................................
CAS Latency ............................................
Operating Mode ......................................
Write Burst Mode ....................................
Commands ............................................................
Truth Table 1 (Commands and DQM Operation) ............
6
6
6
6
6
7
8
8
8
9
9
AC Electrical Characteristics (Timing Table) .... 32
AC Electrical Characteristics ................................... 34
Timing Waveforms
Command Inhibit ............................................. 10
No Operation (NOP).......................................... 10
Load Mode Register ........................................... 10
Active ................................................................ 10
Read ................................................................ 10
Write ................................................................ 10
Precharge ........................................................... 10
Auto Precharge .................................................. 10
Burst Terminate ................................................. 11
Auto Refresh ...................................................... 11
Self Refresh ........................................................ 11
Operation ............................................................... 12
Bank/Row Activation ........................................ 12
Reads ................................................................ 13
Writes ................................................................ 19
Precharge ........................................................... 21
Power-Down ...................................................... 21
Clock Suspend .................................................. 22
Burst Read/Single Write .................................... 22
Initialize and Load Mode Register .................... 36
Power-Down Mode .......................................... 37
Clock Suspend Mode........................................ 38
Auto Refresh Mode ........................................... 39
Self Refresh Mode ............................................. 40
Reads
Read – Single Read....................................... 41
Read – Without Auto Precharge ................. 42
Read – With Auto Precharge ....................... 43
Alternating Bank Read Accesses .................. 44
Read – Full-Page Burst ................................. 45
Read – DQM Operation .............................. 46
Writes
Write – Single Write ..................................... 47
Write – Without Auto Precharge ................ 48
Write – With Auto Precharge ...................... 49
Alternating Bank Write Accesses ................. 50
Write – Full-Page Burst ................................ 51
Write – DQM Operation ............................. 52
64Mb: x32 SDRAM
64MSDRAMx32_5.p65 – Rev. B; Pub. 6/02
MicronTechnology,Inc.,reservestherighttochangeproductsorspecificationswithoutnotice.
©2002,MicronTechnology,Inc.
3
MICRON [ MICRON TECHNOLOGY ]
