MB81N643289 Datasheet, PDF (48/64 Pages) Fujitsu Component Limited. – 8 x 256K x 32 BIT DOUBLE DATA RATE FCRAMTM

MB81N643289-50/-60 Preliminary (AE1E)
TIMING DIAGRAM – 15 : PAGE MODE READ / WRITE
(Timing assumes CL=3, BL=4, Multiple Bank Access)
CLK
CLK
lRCD
Command ACTVa ACTVb NOP WRa
lWRD
NOP
lRPL
RDb NOP PCA
tPCAL
NOP
ACTV
NOP
DQ
Hi-Z
Hi-Z
DQS
D1 D2 D3 D4
Q1 Q2 Q3 Q4
WL (Bank a)
CL (Bank b)
TIMING DIAGRAM – 16 : AUTO-REFRESH
(Timing assumes CL=2, BL=2)
CLK
CLK
lRDA
tREFC
Command
ACTV
NOP
RDA
NOP
REF
NOP
Any
Hi-Z
DQ
Q1 Q2
DQS
Hi-Z
Note: Refresh command can be issued all banks has been closed.
48