MB81F643242B-10FN-X Datasheet, PDF (7/56 Pages) Fujitsu Component Limited. – MEMORY CMOS 4 X 512 K X 32 BIT SYNCHRONOUS DYNAMIC RAM

MB81F643242B-10FN-X Advanced Info (AE0.3E)
OPERATION COMMAND TABLE (Applicable to single bank) Note *1
Current
State
CS RAS CAS WE
Addr
Command
Function
Notes
Idle
HXXX
X
DESL
NOP
L HHH
X
NOP
NOP
L HH L
X
BST
NOP
L H L H BA, CA, AP READ/READA Illegal
*2
L H L L BA, CA, AP WRIT/WRITA Illegal
*2
L LHH
BA, RA
ACTV
Bank Active after tRCD
L LHL
BA, AP
PRE/PALL NOP
L L LH
X
REF/SELF Auto-refresh or Self-refresh
*3, *6
LLLL
MODE
MRS
Mode Register Set
(Idle after tRSC)
*3, *7
Bank Active H X X X
X
DESL
NOP
L HHH
X
NOP
NOP
L HH L
X
BST
NOP
L H L H BA, CA, AP READ/READA Begin Read; Determine AP
L H L L BA, CA, AP WRIT/WRITA Begin Write; Determine AP
L LHH
BA, RA
ACTV
Illegal
*2
L LHL
BA, AP
PRE/PALL Precharge; Determine Precharge Type
L L LH
X
REF/SELF Illegal
LLLL
MODE
MRS
Illegal
(Continued)
7