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參數(shù)資料
| 型號(hào)： | 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)： | 39/66頁 |
| 文件大小： | 1921K |
| 代理商： | MT46V4M32 |
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39
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
TRUTH TABLE 4 – CURRENT STATE BANK
n
– COMMAND TO BANK
m
(Notes: 1-6; notes appear below and on next page)
CURRENT STATE CS# RAS# CAS# WE#
Any
H
L
Idle
X
Row
L
Activating,
L
Active, or
L
Precharging
L
Read
L
(Auto-
L
Precharge
L
Disabled)
L
Write
L
(Auto-
L
Precharge
L
Disabled)
L
Read
L
(With Auto-
L
Precharge)
L
L
Write
L
(With Auto-
L
Precharge)
L
L
COMMAND/ACTION
DESELECT (NOP/continue previous operation)
NO OPERATION (NOP/continue previous operation)
Any Command Otherwise Allowed to Bank m
ACTIVE (select and activate row)
READ (select column and start READ burst)
WRITE (select column and start WRITE burst)
PRECHARGE
ACTIVE (select and activate row)
READ (select column and start new READ burst)
WRITE (select column and start WRITE burst)
PRECHARGE
ACTIVE (select and activate row)
READ (select column and start READ burst)
WRITE (select column and start new WRITE burst)
PRECHARGE
ACTIVE (select and activate row)
READ (select column and start new READ burst)
WRITE (select column and start WRITE burst)
PRECHARGE
ACTIVE (select and activate row)
READ (select column and start READ burst)
WRITE (select column and start new WRITE burst)
PRECHARGE
NOTES
X
H
X
L
H
H
L
L
H
H
L
L
H
H
L
L
H
H
L
L
H
H
L
X
H
X
H
L
L
H
H
L
L
H
H
L
L
H
H
L
L
H
H
L
L
H
X
H
X
H
H
L
L
H
H
L
L
H
H
L
L
H
H
L
L
H
H
L
L
7
7
7
7, 9
7, 8
7
7
7, 9
7
7
NOTE:
1. This table applies when CKE
n-1
was HIGH and CKE
n
is HIGH (see Truth Table 2) and after
t
XSNR has been
met (if the previous state was self refresh).
2. This table describes alternate bank operation, except where noted (i.e., the current state is for bank
n
and
the commands shown are those allowed to be issued to bank
m,
assuming that bank m is in such a state
that the given command is allowable). Exceptions are covered in the notes below.
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