MB81EDS256445 Datasheet, PDF (13/52 Pages) Fujitsu Component Limited. – MEMORY Consumer FCRAM CMOS 256M Bit (4 bank x 1M word x 64 bit) Consumer Applications Specific Memory for SiP

MB81EDS256445
3) Single Bank Operation
Current State CS RAS CAS WE
IDLE
HXXX
L HHH
L HH L
LHLH
LHL L
L LHH
L LHL
L L LH
LLLL
BANK ACTIVE
HXXX
L HHH
L HH L
LHLH
LHL L
L LHH
Address
X
X
X
BA, CA, AP
BA, CA, AP
BA, RA
BA, AP
X
MODE
X
X
X
BA, CA, AP
BA, CA, AP
BA, RA
L LHL
BA, AP
L L LH
LLLL
X
MODE
Command
DESL
NOP
BST
READ/READA
WRIT/WRITA
ACT
PRE/PALL
REF
MRS
DESL
NOP
BST
READ/READA
WRIT/WRITA
ACT
PRE/PALL
REF
MRS
Function
NOP
Illegal *¹
Bank Active
NOP *²
Auto Refresh *³
Mode Register Set *^3, *⁴
NOP
Start Read; Determine AP
Start Write; Determine AP
Illegal *¹
Precharge; Determine
Precharge Type
Illegal
(Continued)
DS05-11456-1E
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