MB81F641642D Fujitsu Microelectronics, MB81F641642D Datasheet - Page 8

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

8
MB81F641642D-75/-102/-102L
Read
Write
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
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
READ/READA
WRIT/WRITA
WRIT/WRITA
Command
PRE/PALL
REF/SELF
PRE/PALL
REF/SELF
DESL
ACTV
DESL
ACTV
NOP
MRS
NOP
MRS
BST
BST
Preliminary (AE4.1E)
NOP (Continue Burst to End
Active)
NOP (Continue Burst to End
Active)
Burst Stop
Terminate Burst, New Read;
Determine AP
Terminate Burst, Start Write;
Determine AP
Illegal
Terminate Burst, Precharge
Determine Precharge Type
Illegal
Illegal
NOP (Continue Burst to End
Bank Active)
NOP (Continue Burst to End
Bank Active)
Burst Stop
Terminate Burst, Start Read;
Determine AP
Terminate Burst, New Write;
Determine AP
Illegal
Terminate Burst, Precharge
Determine Precharge Type
Illegal
Illegal
Function
Bank Active
Bank Active
(Continued)
Idle;
Bank
Bank
Notes
*4
*2
*4
*2