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| 型號： | MT46V4M32 |
| 廠商： | Micron Technology, Inc. |
| 英文描述： | DOUBLE DATA RATE DDR SDRAM |
| 中文描述： | 雙倍數(shù)據(jù)速率的DDR SDRAM內(nèi)存 |
| 文件頁數(shù)： | 3/66頁 |
| 文件大?。?/td> | 1921K |
| 代理商： | MT46V4M32 |
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3
128Mb: x32 DDR SDRAM
4M32DDR_B.p65 – Rev. B, Pub. 7/02
Micron Technology, Inc., reserves the right to change products or specifications without notice.
2002, Micron Technology, Inc.
128Mb: x32
DDR SDRAM
ADVANCE
TABLE OF CONTENTS
Functional Block Diagram - 4 Meg x 32 .....................
Pin Descriptions ..........................................................
4
5
Functional Description
...............................................
Initialization ...........................................................
Register Definition ................................................
Mode Register ...................................................
Burst Length.................................................
Burst Type....................................................
Read Latency...............................................
Operating Mode..........................................
Extended Mode Register................................. 10
DLL Enable/Disable .................................. 10
7
7
7
7
8
9
9
9
Commands
................................................................... 11
Truth Table 1 (Commands)
............................................ 11
Truth Table 1A (DM Operation)
...................................... 11
Deselect................................................................... 12
No Operation (NOP) .............................................. 12
Load Mode Register ............................................... 12
Active ....................................................................... 12
Read ....................................................................... 12
Write ....................................................................... 12
Precharge ................................................................ 12
Auto Precharge....................................................... 12
Burst Terminate ..................................................... 12
Auto Refresh ........................................................... 13
Self Refresh ............................................................. 13
Operation
..................................................................... 14
Bank/Row Activation ............................................. 14
Reads ....................................................................... 15
Read Burst ......................................................... 16
Consecutive Read Bursts ................................ 17
Nonconsecutive Read Bursts ......................... 18
Random Read Accesses ................................... 19
Terminating a Read Burst ............................... 21
Read to Write..................................................... 22
Read to Precharge ............................................ 23
Writes ....................................................................... 24
Write Burst ......................................................... 25
Consecutive Write to Write............................... 26
Nonconsecutive Write to Write ........................ 27
Random Write Cycles ...................................... 28
Write to Read - Uninterrupting ...................... 29
Write to Read - Interrupting ........................... 30
Write to Read - Odd, Interrupting.................. 31
Write to Precharge - Uninterrupting ............. 32
Write to Precharge - Interrupting .................. 33
Write to Precharge - Odd, Interrupting......... 34
Precharge ................................................................ 35
Power-Down ........................................................... 35
Truth Table 2 (CKE)
...................................................... 36
Truth Table 3 (Current State, Same Bank)
........................ 37
Truth Table 4 (Current State, Different Bank)
.................. 39
Operating Conditions
Absolute Maximum Ratings....................................... 41
DC Electrical Characteristics and Operating
Conditions ............................................................... 41
AC Input Operating Conditions ................................ 41
Clock Input Operating Conditions ........................... 42
DC Electrical Characteristics and Operating
Conditions, 1.8V Option ....................................... 43
AC Input Operating Conditions, 1.8V Option ......... 43
Clock Input Operating Conditions, 1.8V Option .... 43
Capacitance.................................................................. 44
I
DD
Specifications and Conditions................................ 44
Electrical Characteristics and Recommended
AC Operating Conditions ..................................... 45
Notes ............................................................................. 46
Derating Data Valid Window ..................................... 47
Voltage and Timing Waveforms
Impedance Match Output.................................... 50
Reduced Output Drive Characteristics .............. 51
Output Timing -
t
DQSQ and
t
QH ......................... 52
Output Timing -
t
AC
and
t
DQSCK ....................... 54
Input Timing .......................................................... 54
Input Voltage.......................................................... 55
Initialize and Load Mode Registers ..................... 56
Power-Down Mode ................................................ 57
Auto Refresh Mode ................................................ 58
Self Refresh Mode .................................................. 59
Reads
Bank Read - Without Auto Precharge............ 60
Bank Read - With Auto Precharge.................. 61
Writes
Bank Write - Without Auto Precharge ........... 62
Bank Write - With Auto Precharge ................. 63
Write - DM Operation ...................................... 64
100-pin TQFP dimensions.......................................... 65
FBGA Package .............................................................. 66
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