MB81P643287 Datasheet, PDF (16/65 Pages) Fujitsu Component Limited. – 8 x 256K x 32 BIT, FCRAMTM CORE BASED DOUBLE DATA RATE SDRAM

MB81P643287-50/-60
COMMAND TRUTH TABLE FOR CKE (continued)
Current
State
CKE CKE
(n-1) (n)
CS
RAS CAS
WE
Address
Function
Notes
Bank
H
H
X
X
X
X
Activating,
H
L
X
X
X
X
Read, Write,
Write
L
H
X
X
X
X
Recovering,
Precharging ^L
L
X
X
X
X
X Refer to the Command Truth Table.
X Illegal
*23
X Invalid
X Invalid
Any State
L
X
X
X
X
X
Other Than H
H
X
X
X
X
Listed Above _H
L
X
X
X
X
X Invalid
X Refer to the Command Truth Table.
X Illegal
*23
H
L
H
L
L
L
X Illegal
H
L
L
H
H
H
X Illegal
H
L
L
H
H
L
X Illegal
Refresh
H
L
L
H
L
X
H
L
L
L
X
X
X Illegal
X Illegal
L
L
X
X
X
X
X Invalid
L
H
X
X
X
X
X Invalid
H
H
X
X
X
X
X Refer to the Command Truth Table.
Notes: *21. Refer to “s MODE REGISTER TABLE”.
*22. PDEN and SELF command should only be issued after the last read data have been appeared on DQ.
*23. The Clock Suspend mode is not supported on this device and it is illegal if CKE is brought to Low during
the Burst Read or Write mode.
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