MB81F641642D Fujitsu Microelectronics, MB81F641642D Datasheet - Page 7

• Manufacturer Part Number: MB81F641642D
• Description: 4 x 1M x 16-Bit SDRAM
• Manufacturer: Fujitsu Microelectronics

OPERATION COMMAND TABLE (Applicable to single bank) Note *1
Idle
Bank Active
Current
State
CS
H
H
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
RAS CAS WE
X
H
H
H
H
X
H
H
H
H
L
L
L
L
L
L
L
L
MB81F641642D-75/-102/-102L
X
H
H
H
H
X
H
H
H
H
L
L
L
L
L
L
L
L
H
H
H
H
H
H
H
H
X
X
L
L
L
L
L
L
L
L
BA, CA, AP
BA, CA, AP
BA, CA, AP
BA, CA, AP
BA, RA
BA, AP
BA, RA
BA, AP
MODE
MODE
Addr
X
X
X
X
X
X
X
X
READ/READA Illegal
READ/READA Begin Read; Determine AP
WRIT/WRITA
WRIT/WRITA
Command
PRE/PALL
REF/SELF
PRE/PALL
REF/SELF
DESL
ACTV
DESL
ACTV
NOP
MRS
NOP
MRS
BST
BST
NOP
NOP
NOP
Illegal
Bank Active after t
NOP
Auto-refresh or Self-refresh
Mode Register Set
(Idle after t
NOP
NOP
NOP
Begin Write; Determine AP
Illegal
Precharge; Determine Precharge Type
Illegal
Illegal
Function
RSC
)
Preliminary (AE4.1E)
RCD
(Continued)
Notes
*3, 6
*3, 7
*2
*2
*2
7