eorex
EM48AM3284LBA
Output Drive Strength
The normal drive strength got all outputs is specified to be LV-CMOS. By setting EMRS specific parameter
on A6 and A5, driving capability of data output drivers is selected.
Partial Array Self Refresh
In EMRS setting A0~A2 ,memory array size to be refreshed during self-refresh operation is programmable in
order to reduce power. Data outside the defined area will not be retained during self-refresh.
Auto Temperature Compensated Self Refresh (ATCSR)
In EMRS setting A9=0 , With the built-in temperature sensor, the internal self refresh frequency is controlled
autonomously..
1. Command Truth Table
CKE
n-1
BA0,
BA1
A11,
A9~A10
Command
Symbol
/CS /RAS /CAS /WE
A10
n
X
X
X
X
X
X
X
X
X
X
X
Ignore Command
No Operation
Burst Stop
DESL
NOP
H
H
H
H
H
H
H
H
H
H
H
H
L
L
L
L
L
L
L
L
L
L
X
H
H
H
H
H
L
X
H
H
L
X
H
L
X
X
X
V
V
V
V
V
V
X
L
X
X
X
L
X
X
X
V
V
V
V
V
X
X
V
BSTH
READ
Read
H
H
L
Read with Auto Pre-charge READA
Write WRIT
Write with Auto Pre-charge WRITA
L
H
L
L
H
H
H
H
L
H
H
L
H
V
L
Bank Activate
ACT
PRE
PALL
MRS
L
Pre-charge Select Bank
Pre-charge All Banks
Mode Register Set
L
L
L
H
L
L
L
H = High level, L = Low level, X = High or Low level (Don't care), V = Valid data input
Jul. 2007
www.eorex.com
14/20
EOREX [ EOREX CORPORATION ]
