EM48AMM1684VTG
4. Operative Command Table (Continued) (Note 7)
Current
/CS /R /C /W
Addr.
Command
Action
Notes
state
H
L
L
L
L
L
L
L
L
H
X
H
H
H
H
L
X
H
H
L
X
H
L
X
X
X
DESL
NOP
BST
Continue burst to end→ Pre-charging
Continue burst to end→ Pre-charging
ILLEGAL
H
L
BA/CA/A10 READ/READA ILLEGAL
BA/CA/A10 WRIT/WRITA ILLEGAL
9
9
9
9
Read with AP
L
H
H
L
H
L
BA/RA
BA, A10
X
ACT
ILLEGAL
L
PRE/PALL ILLEGAL
REF/SELF ILLEGAL
L
H
L
L
L
Op-Code
X
MRS
ILLEGAL
X
X
X
DESL
burst to end→ Write
recovering with auto pre-charge
Continue burst to end→ Write
recovering with auto pre-charge
ILLEGAL
L
H
H
H
X
NOP
L
L
L
L
L
L
L
H
L
L
L
L
L
L
L
L
H
L
L
L
L
L
L
L
L
H
H
H
L
H
L
L
H
L
X
BST
BA/CA/A10 READ/READA ILLEGAL
BA/CA/A10 WRIT/WRITA ILLEGAL
9
9
9
9
Write with AP
L
H
H
L
H
L
BA/RA
ACT
ILLEGAL
L
BA, A10
PRE/PALL ILLEGAL
REF/SELF ILLEGAL
L
H
L
X
L
L
Op-Code
MRS
DESL
NOP
ILLEGAL
X
H
H
H
H
L
X
H
H
L
X
H
L
X
Nop→ Enter idle after tRP
Nop→ Enter idle after tRP
ILLEGAL
X
X
BST
READ/READA
H
L
BA/CA/A10
ILLEGAL
9
9
9
Pre-charging
WRIT/WRITA
L
BA/CA/A10
ILLEGAL
H
H
L
H
L
BA/RA
ACT
PRE/PALL
ILLEGAL
L
BA, A10
Nop→ Enter idle after tRP
L
H
L
X
REF/SELF ILLEGAL
L
L
Op-Code
MRS
DESL
NOP
BST
ILLEGAL
X
H
H
H
H
L
X
H
H
L
X
H
L
X
X
X
Nop→ Enter idle after tRCD
Nop→ Enter idle after tRCD
ILLEGAL
ILLEGAL
ILLEGAL
H
L
BA/CA/A10 READ/READA
9
9
Row
WRIT/WRITA ILLEGAL
activating
L
BA/CA/A10
BA/RA
BA, A10
X
H
H
L
H
L
ACT
9,16
9
PRE/PALL ILLEGAL
L
ILLEGAL
ILLEGAL
L
H
L
REF/SELF
MRS
L
L
Op-Code
Remark H = High level, L = Low level, X = High or Low level (Don't care), AP = Auto Pre-charge
Jun. 2010
17/20
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