
16Mb: x16 SDRAM
16MSDRAMx16.p65
–
Rev. 8/99
Micron Technology, Inc., reserves the right to change products or specifications without notice.
1999, Micron Technology, Inc.
3
16Mb: x16
SDRAM
TABLE OF CONTENTS
Functional Block Diagram - 1 Meg x 16 .................
Pin Descriptions........................................................
3
4
Functional Description
........................................
Initialization........................................................
Register Definitions .............................................
Mode Register ................................................
Burst Length..............................................
Burst Type .................................................
CAS Latency..............................................
Operating Mode .......................................
Write Burst Mode .....................................
Commands
..............................................................
Truth Table 1 (Commands and DQM Operation)
..............
Command Inhibit ...............................................
No Operation (NOP) ..........................................
Load Mode Register ............................................
Active ..................................................................
Read
..................................................................
Write ..................................................................
Precharge .............................................................
Auto Precharge....................................................
Burst Terminate ...................................................
Auto Refresh........................................................ 10
Self Refresh .......................................................... 10
Operation
................................................................ 11
Bank/Row Activation ......................................... 11
Reads .................................................................. 12
Writes .................................................................. 18
Precharge ............................................................. 20
Power-Down ....................................................... 20
Clock Suspend .................................................... 21
Burst Read/Single Write ...................................... 21
5
5
5
5
5
5
7
7
7
8
8
9
9
9
9
9
9
9
9
9
Concurrent Auto Precharge ................................ 22
Truth Table 2 (CKE)
................................................... 24
Truth Table 3 (Current State, Same Bank)
....................... 25
Truth Table 4 (Current State, Different Bank)
................... 27
Absolute Maximum Ratings .................................... 29
DC Electrical Characteristics and Operating Conditions
29
I
DD
Specifications and Conditions .......................... 29
Capacitance .............................................................. 30
AC Electrical Characteristics (Timing Table)
.... 30
Timing W aveforms
Initialize and Load Mode Register...................... 33
Power-Down Mode ............................................ 34
Clock Suspend Mode.......................................... 35
Auto Refresh Mode ............................................. 36
Self Refresh Mode ............................................... 37
Reads
Read - Single Read ......................................... 38
Read - Without Auto Precharge .................... 39
Read - With Auto Precharge.......................... 40
Alternating Bank Read Accesses .................... 41
Read - Full-Page Burst .................................... 42
Read - DQM Operation ................................. 43
Writes
Write - Single Write ....................................... 44
Write - Without Auto Precharge ................... 45
Write - With Auto Precharge......................... 46
Alternating Bank Write Accesses ................... 47
Write - Full-Page Burst ................................... 48
Write - DQM Operation ................................ 49