MB81P643287 Datasheet, PDF (12/65 Pages) Fujitsu Component Limited. – 8 x 256K x 32 BIT, FCRAMTM CORE BASED DOUBLE DATA RATE SDRAM

MB81P643287-50/-60
OPERATION COMMAND TABLE (Continued)
Current
State
CS RAS CAS WE Address
HXXX
X
L HHH
X
L HH L
X
L H L H BA, CA, AP
Write
L H L L BA, CA, AP
Recovering _{L L H H}
BA, RA
L LHL
BA, AP
L LHL
BA, AP
L L LH
X
LLLL
MODE
HXXX
X
L HHH
X
L HH L
X
L H L H BA, CA, AP
Write
Recovering ^{L H L L BA, CA, AP}
with Auto-
precharge
L LHH
L LHL
BA, RA
BA, AP
L LHL
BA, AP
L L LH
X
LLLL
MODE
HXXX
X
L HHX
X
LHLX
X
Refreshing
L LHX
X
LLLX
X
Command
Function
DESL
NOP (Bank Active after lWRD)
NOP
NOP (Bank Active after lWRD)
BST
NOP (Bank Active after lWRD)
READ/READA Illegal
WRIT/WRITA New Write; Determine AP
ACTV
Illegal
PRE
Illegal
PALL
Illegal
REF/SELF Illegal
MRS
Illegal
DESL
NOP (Idle after lWAL)
NOP
NOP (Idle after lWAL)
BST
Illegal
READ/READA Illegal
WRIT/WRITA Illegal
ACTV
Illegal
PRE
Illegal
PALL
Illegal
REF/SELF Illegal
MRS
Illegal
DESL
NOP (Idle after lRFC)
NOP/BST NOP (Idle after lRFC)
READ/READA/
WRIT/WRITA
Illegal
ACTV/
PRE/PALL
Illegal
REF/SELF/
MRS
Illegal
Notes
*15
*16
*16
*16
*16
*16
*16
*16
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