EM44DM1688LBB
3. Operative Command Table
Current
State
/CS /R /C /W
Addr.
Command
Action
H
L
L
L
X
H
H
H
X
H
L
X
H
H
L
X
DESL
NOP
NOP
X
NOP
BA/CA/A10
BA/CA/A10
READ/READA
WRIT/WRITA
ILLEGAL (Note 1)
ILLEGAL (Note 1)
Bank active,Latch RA
L
Idle
L
L
L
L
L
L
H
H
L
H
L
BA/RA
BA, A10
X
ACT
PRE/PREA
REF/SELF
NOP(Note 3)
Auto/Self refresh(Note 4)
H
Op-Code,
Mode-Add
L
L
L
L
MRS/EMRS(1)(2) Mode register
H
L
X
H
X
H
X
H
X
X
DESL
NOP
NOP
NOP
Begin read,Latch CA, Determine
auto-precharge
L
L
H
H
L
L
H
L
BA/CA/A10
BA/CA/A10
READ/READA
WRIT/WRITA
Begin write,Latch CA, Determine
auto-precharge
Bank
Active
L
L
L
L
L
L
H
H
L
H
L
BA/RA
BA/A10
X
ACT
ILLEGAL (Note 1)
PRE/PREA
REF/SELF
Precharge/Precharge all
ILLEGAL (Note 1)
H
Op-Code,
Mode-Add
L
L
L
L
MRS/EMRS(1)(2) ILLEGAL (Note 1)
H
L
L
L
X
H
H
H
X
H
L
X
H
H
L
X
DESL
NOP
Row Active(Continue burst to end)
X
Row Active(Continue burst to end)
Burst Interrupt
BA/CA/A10
BA/CA/A10
READ/READA
WRIT/WRITA
L
ILLEGAL(Note 1)
Read
L
L
H
H
BA/RA
ACT
ILLEGAL (Note 1)
L
L
L
L
H
L
L
BA, A10
PRE/PREA
REF/SELF
ILLEGAL (Note 1)
ILLEGAL (Note 1)
H
X
Op-Code,
Mode-Add
L
L
L
L
MRS/EMRS(1)(2) ILLEGAL (Note 1)
H
L
L
L
X
H
H
H
X
H
L
X
H
H
L
X
DESL
NOP
Write recovering (Continue burst to end)
X
Write recovering (Continue burst to end)
ILLEGAL(Note 1)
BA/CA/A10
BA/CA/A10
READ/READA
WRIT/WRITA
Write
L
Burst Interrupt
L
L
H
H
BA/RA
ACT
ILLEGAL (Note 1)
L
L
L
L
L
L
H
L
L
L
H
L
BA, A10
X
PRE/PREA
REF/SELF
ILLEGAL (Note 1)
ILLEGAL (Note 1)
Op-Code,
MRS/EMRS(1)(2) ILLEGAL (Note 1)
Nov. 2011
17/29
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