EM639165
FUNCTION TRUTH TABLE
Current State /CS /RAS /CAS /WE Address
Command Action
IDLE
H
L
L
L
L
L
L
L
X
H
H
H
L
L
L
L
X
H
H
L
X
H
L
X
DESEL
NOP
NOP
X
NOP
TBST
ILLEGAL*2
ILLEGAL*2
Bank Active, Latch RA
NOP*4
BA
READ /
WRITE
X
H
L
BA, CA, A10
BA, RA
BA, A10
X
H
H
L
ACT
PRE /
PREA
H
L
REFA
MRS
Auto-Refresh*5
Mode Register Set*5
Op-Code,
L
Mode-Add
ROW
H
L
L
L
L
X
H
H
H
H
X
H
H
L
X
H
L
X
DESEL
NOP
NOP
NOP
NOP
ACTIVE
X
BA
TBST
Begin Read, Latch CA, Determine
Auto-Precharge
READ /
READA
WRITE /
WRITEA
H
L
BA, CA, A10
BA, CA, A10
BA, RA
Begin Write, Latch CA, Determine
Auto-Precharge
L
L
L
L
L
H
H
H
L
ACT
Bank Active / ILLEGAL*2
Precharge / Precharge All
PRE /
PREA
BA, A10
L
L
L
L
L
L
H
L
X
REFA
MRS
ILLEGAL
ILLEGAL
Op-Code,
Mode-Add
Preliminary
Rev 1.0 Feb. 2001
6
ETRON [ ETRON TECHNOLOGY, INC. ]
