MT47H64M8CF-25E IT:G Micron Technology Inc, MT47H64M8CF-25E IT:G Datasheet - Page 69

• Manufacturer Part Number: MT47H64M8CF-25E IT:G
• Description: 64MX8 DDR2 SDRAM PLASTIC IND TEMP FBGA 1.8V
• Manufacturer: Micron Technology Inc

Table 38: Truth Table – Current State Bank n – Command to Bank m
Notes: 1–6 apply to the entire table
PDF: 09005aef8440dbbc
512mbddr2_ait_aat.pdf – Rev. C 7/11 EN
Current State
Any
Idle
Row
active, active,
or precharge
Read (auto
precharge
disabled)
Write (auto
precharge
disabled)
Read (with
auto
precharge)
Write (with
auto
precharge)
CS#
H
X
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
Notes:
RAS#
X
H
X
H
H
H
H
H
H
H
H
H
H
L
L
L
L
L
L
L
L
L
L
1. This table applies when CKEn - 1 was HIGH and CKEn is HIGH and after
2. This table describes an alternate bank operation, except where noted (the current state
3. Current state definitions:
met (if the previous state was self refresh).
is for bank n and the commands shown are those allowed to be issued to bank m, as-
suming that bank m is in such a state that the given command is allowable). Exceptions
are covered in the notes below.
Idle:
Row active:
Read:
Write:
CAS#
X
H
X
H
H
H
H
H
H
H
H
H
H
L
L
L
L
L
L
L
L
L
L
Micron Confidential and Proprietary
WE#
X
H
X
H
H
H
H
H
H
H
H
H
H
L
L
L
L
L
L
L
L
L
L
DESELECT (NOP/continue previous operation)
NO OPERATION (NOP/continue previous operation)
Any command otherwise allowed to bank m
ACTIVATE (select and activate row)
READ (select column and start READ burst)
WRITE (select column and start WRITE burst)
PRECHARGE
ACTIVATE (select and activate row)
READ (select column and start new READ burst)
WRITE (select column and start WRITE burst)
PRECHARGE
ACTIVATE (select and activate row)
READ (select column and start READ burst)
WRITE (select column and start new WRITE burst)
PRECHARGE
ACTIVATE (select and activate row)
READ (select column and start new READ burst)
WRITE (select column and start WRITE burst)
PRECHARGE
ACTIVATE (select and activate row)
READ (select column and start READ burst)
WRITE (select column and start new WRITE burst)
PRECHARGE
The bank has been precharged,
burst is complete.
A row in the bank has been activated and
No data bursts/accesses and no register accesses are in progress.
A READ burst has been initiated with auto precharge disabled
and has not yet terminated.
A WRITE burst has been initiated with auto precharge disabled
and has not yet terminated.
69
512Mb: x8, x16 Automotive DDR2 SDRAM
Micron Technology, Inc. reserves the right to change products or specifications without notice.
Command/Action
t
RP has been met, and any READ
‹ 2010 Micron Technology, Inc. All rights reserved.
t
RCD has been met.
t
XSNR has been
Commands
7, 9, 10
Notes
7, 10
7, 8
7, 8
7
7
7
7
7
7