eorex
3. Operative Command Table
Current
State
/CS
H
L
L
L
Idle
L
L
L
L
H
L
L
Row
Active
L
L
L
L
L
H
L
L
L
Read
L
L
L
L
H
L
L
L
L
L
L
L
X
H
H
H
H
H
L
L
X
H
H
L
H
L
H
L
X
H
L
H
BA/RA
BA, A10
X
Op-Code,
Mode-Add
X
X
X
BA/CA/A10
ACT
PRE/PREA
REFA
MRS
DESL
NOP
TERM
READ/READA
EM42AM3284LBA
/R
X
H
H
H
L
L
L
L
X
H
H
H
L
L
L
L
X
H
H
H
/C
X
H
H
L
H
H
L
L
X
H
H
L
H
H
L
L
X
H
H
L
/W
X
H
L
X
H
L
H
L
X
H
L
L
H
L
H
L
X
H
L
H
Addr.
X
X
X
BA/CA/A10
BA/RA
BA, A10
X
Op-Code,
Mode-Add
X
X
BA/CA/A10
BA/CA/A10
BA/RA
BA/A10
X
Op-Code,
Mode-Add
X
X
X
BA/CA/A10
Command
DESL
NOP
TERM
READ/WRIT/BW
ACT
PRE/PREA
REFA
MRS
DESL
NOP
READ/READA
WRIT/WRITA
ACT
PRE/PREA
REFA
MRS
DESL
NOP
TERM
READ/READA
Action
NOP
NOP
NOP
ILLEGAL
(Note 1)
Bank active,Latch RA
NOP
(Note 4)
Auto refresh
Mode register
NOP
NOP
Begin read,Latch CA,
Determine auto-precharge
Begin write,Latch CA,
Determine auto-precharge
ILLEGAL
Precharge/Precharge all
ILLEGAL
ILLEGAL
NOP(Continue burst to end)
NOP(Continue burst to end)
Terminal burst
Terminate burst,Latch CA,
Begin new read,
Determine Auto-precharge
ILLEGAL
(Note 1)
(Note 1)
(Note 3)
Terminate burst, PrecharE
ILLEGAL
ILLEGAL
NOP(Continue burst to end)
NOP(Continue burst to end)
ILLEGAL
Terminate burst with DM=”H”,Latch
CA,Begin read,Determine
(Note 2)
auto-precharge
Terminate burst,Latch CA,Begin
new write, Determine
(Note 2)
auto-precharge
ILLEGAL
(Note 1)
Write
L
L
L
L
L
H
L
L
L
L
L
H
H
L
L
L
H
L
H
L
BA/CA/A10
BA/RA
BA, A10
X
Op-Code,
WRIT/WRITA
ACT
PRE/PREA
REFA
MRS
Terminate burst with DM=”H”,
Precharge
ILLEGAL
ILLEGAL
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Jul. 2006
11/20
EOREX [ EOREX CORPORATION ]
