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