MB81N643289 Datasheet, PDF (11/64 Pages) Fujitsu Component Limited. – 8 x 256K x 32 BIT DOUBLE DATA RATE FCRAMTM

MB81N643289-50/-60 Preliminary (AE1E)
s FUNCTION TRUTH TABLE (Continued)
OPERATION COMMAND TABLE (Continued)
Current
State
CS RAS CAS WE Address
Write
HXXX
X
Recovering
L HHH
X
L HH L
—
L H L H BA, CA, AC
L H L L BA, CA, AC
L LHH
BA, RA
L LHL
BA, AC
L LHL
BA, AC
L L LH
X
LLLL
MODE
Write
HXXX
X
Recovering _{L H H H}
X
with Auto-
Close
L HH L
—
L H L H BA, CA, AC
L H L L BA, CA, AC
L LHH
BA, RA
L LHL
BA, AC
L LHL
BA, AC
L L LH
X
LLLL
MODE
Refreshing H X X X
X
L HHX
X
LHLX
X
L LHX
X
LLLX
X
Command
Function
Notes
DESL
NOP (Bank Active after lWRL)
NOP
NOP (Bank Active after lWRL)
—
Illegal
RD/RDA Illegal
WR/WRA New Write; Determine AC
ACTV
Illegal
PC
Illegal
*15
PCA
Illegal
REF/SELF Illegal
MRS/EMRS Illegal
DESL
NOP (Idle after lWAL)
NOP
NOP (Idle after lWAL)
—
Illegal
RD/RDA Illegal
*17
WR/WRA Illegal
*17
ACTV
Illegal
*15
PC
Illegal
*15
PCA
Illegal
REF/SELF Illegal
MRS/EMRS Illegal
DESL
NOP (Idle after lREFC)
NOP
NOP (Idle after lREFC)
RD/RDA/
WR/WRA
Illegal
ACTV/
PC/PCA
Illegal
REF/SELF/
MRS/EMRS
Illegal
11