參數(shù)資料
型號: MT46V32M81AZ4-6T:G
元件分類: DRAM
英文描述: 32M X 4 DDR DRAM, 0.75 ns, PDSO66
封裝: 0.400 INCH, PLASTIC, TSOP-66
文件頁數(shù): 39/82頁
文件大小: 2866K
128Mb: x4, x8, x16
DDR SDRAM
09005aef8074a655
Micron Technology, Inc., reserves the right to change products or specifications without notice.
128MBDDRx4x8x16_2.fm - Rev. J 7/04 EN
44
2000 Micron Technology, Inc. All rights reserved.
NOTE:
1. This table applies when CKEn-1 was HIGH and CKEn is HIGH (see Truth Table 2) and after
tXSNR 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 com-
mands shown are those allowed to be issued to bank m, assuming that bank m is in such a state that the given com-
mand is allowable). Exceptions are covered in the notes below.
3. Current state definitions:
Idle: The bank has been precharged, and tRP has been met.
Row Active: A row in the bank has been activated, and tRCD has been met. No data bursts/accesses and no regis-
ter accesses are in progress.
Read: A READ burst has been initiated, with auto precharge disabled, and has not yet terminated or been termi-
nated.
Write:A WRITE burst has been initiated, with auto precharge disabled, and has not yet terminated or been ter-
minated
Read with Auto Precharge Enabled: See following text – 3a
Write with Auto Precharge Enabled: See following text – 3a
3a.
The read with auto precharge enabled or write with auto precharge enabled states can each be bro-
ken into two parts: the access period and the precharge period. For read with auto precharge, the
precharge period is defined as if the same burst was executed with auto precharge disabled and
then followed with the earliest possible PRECHARGE command that still accesses all of the data in
the burst. For write with auto precharge, the precharge period begins when tWR ends, with tWR
measured as if auto precharge was disabled. The access period starts with registration of the com-
mand and ends where the precharge period (or tRP) begins.
Table 10:
Truth Table – Current State Bank n - Command to Bank m
(Notes: 1-6; notes appear below and on next page)
CURRENT STATE
CS#
RAS#
CAS#
WE#
COMMAND/ACTION
NOTES
Any
HX
X
DESELECT (NOP/continue previous operation)
LH
H
NO OPERATION (NOP/continue previous operation)
Idle
XX
X
Any Command Otherwise Allowed to Bank m
Row
Activating,
Active, or
Precharging
LL
H
ACTIVE (select and activate row)
LH
L
H
READ (select column and start READ burst)
7
LH
L
WRITE (select column and start WRITE burst)
7
LL
H
L
PRECHARGE
Read
(Auto-
Precharge
Disabled)
LL
H
ACTIVE (select and activate row)
LH
L
H
READ (select column and start new READ burst)
7
LH
L
WRITE (select column and start WRITE burst)
7, 9
LL
H
L
PRECHARGE
Write
(Auto-
Precharge
Disabled)
LL
H
ACTIVE (select and activate row)
LH
L
H
READ (select column and start READ burst)
7, 8
LH
L
WRITE (select column and start new WRITE burst)
7
LL
H
L
PRECHARGE
Read
(With Auto-
Precharge)
LL
H
ACTIVE (select and activate row)
LH
L
H
READ (select column and start new READ burst)
7, 3a
LH
L
WRITE (select column and start WRITE burst)
7, 9, 3a
LL
H
L
PRECHARGE
Write
(With Auto-
Precharge)
LL
H
ACTIVE (select and activate row)
LH
L
H
READ (select column and start READ burst)
7, 3a
LH
L
WRITE (select column and start new WRITE burst)
7, 3a
LL
H
L
PRECHARGE
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