K4C89363AF Datasheet, PDF (20/58 Pages) Samsung semiconductor – 2,097,152-WORDS x 4 BANKS x 36-BITS DOUBLE DATA RATE Network-DRAM

K4C89363AF
Function Truth Table (Continued)
Current State
PD
CS
FN
Address
Command
n-1
n
Action
H
H
H
X
X
DESL
NOP
H
H
L
H
BA, UA
RDA
Row activate for Read
Idle
H
H
L
H
L
H
L
BA, UA
X
X
WRA
PDEN
Row activate for Write
Power Down Entry
H
L
L
X
X
-
Illegal
L
X
X
X
X
-
Refer to Power Down state
H
H
H
X
LA
LAL
Begin read
H
H
L
X
Op-Code MRS/EMRS Access to Mode Register
Row Active for Read
H
L
H
X
X
PDEN
Illegal
H
L
L
X
X
MRS/EMRS Illegal
L
X
X
X
X
-
Invalid
H
H
H
X
LA
LAL
Begin Write
H
H
L
X
X
REF
Auto-Refresh
Row Active for Write
H
L
H
X
X
PDEN
Illegal
H
L
L
X
X
REF (Self) Self-Refresh entry
L
X
X
X
X
-
Invalid
H
H
H
X
X
DESL
Continue burst read to end
H
H
L
H
BA, UA
RDA
Illegal
Read
H
H
L
H
L
H
L
BA, UA
X
X
WRA
PDEN
Illegal
Illegal
H
L
L
X
X
-
Illegal
L
X
X
X
X
-
Invalid
H
H
H
X
X
DESL
Data write & continue burst write to end
H
H
L
H
BA, UA
RDA
Illegal
Write
H
H
L
H
L
H
L
BA, UA
X
X
WRA
PDEN
Illegal
Illegal
H
L
L
X
X
-
Illegal
L
X
X
X
X
-
Invalid
H
H
H
H
H
L
X
X
H
BA, UA
DESL
RDA
NOP-> Idle after IREFC
Illegal
Auto-Refreshing
H
H
L
H
L
H
L
BA, UA
X
X
WRA
PDEN
Illegal
Self-Refresh entry
H
L
L
X
X
-
Illegal
L
X
X
X
X
-
Refer to Self-Refreshing state
H
H
H
X
X
DESL
N o p - > I d l e a f t e r IRSC
H
H
L
H
BA, UA
RDA
Illegal
H
H
L
Mode Register Accessing
H
L
H
L
BA, UA
X
X
WRA
PDEN
Illegal
Illegal
H
L
L
X
X
-
Illegal
L
X
X
X
X
-
Invalid
H
X
X
X
X
-
Invalid
Power Down
L
L
X
X
X
L
H
H
X
X
-
RDEX
Maintain Power Down Mode
Exit Power Down Mode->Idle after t _PDEX
L
H
L
X
X
-
Illegal
H
X
X
X
X
-
Invalid
Se;f-Refreshing
L
L
X
X
X
-
Maintain Self-Refresh
L
H
H
X
X
SELFX
Exit Self-Refresh->Idle after IREFC
L
H
L
X
X
-
Illegal
Notes
10
11
11
11
11
12
Notes : 10. Illegal if any bank is not idle.
11. Illegal to bank in specified states : Function may be Legal in the bank indicated by bank Address (BA).
12. Illegal if tFPDL is not Stisfied.
- 20 -
REV. 0.0 Nov. 2002