W9412G6JH
8.2 Function Truth Table
(Note 1)
CURRENT
STATE
ADDRESS
COMMAND
ACTION
NOTES
CS RAS CAS
WE
H
L
L
L
L
L
L
L
H
L
L
L
L
L
L
L
H
L
L
L
L
L
L
L
L
H
X
H
H
H
L
X
H
L
X
X
H
L
X
DSL
NOP/BST
NOP
NOP
X
BA, CA, A10
READ/READA ILLEGAL
3
3
L
BA, CA, A10
WRIT/WRITA
ACT
ILLEGAL
Idle
H
H
L
H
L
BA, RA
Row activating
NOP
L
BA, A10
PRE/PREA
AREF/SELF
MRS/EMRS
DSL
L
H
L
X
Refresh or Self refresh
Mode register accessing
NOP
2
2
L
L
Op-Code
X
H
H
H
L
X
H
L
X
X
H
L
X
X
NOP/BST
NOP
BA, CA, A10
READ/READA Begin read: Determine AP
4
4
3
5
L
BA, CA, A10
WRIT/WRITA
ACT
Begin write: Determine AP
ILLEGAL
Row Active
H
H
L
H
L
BA, RA
L
BA, A10
PRE/PREA
AREF/SELF
MRS/EMRS
DSL
Precharge
L
H
L
X
ILLEGAL
L
L
Op-Code
ILLEGAL
X
H
H
H
H
L
X
H
H
L
X
H
L
X
Continue burst to end
Continue burst to end
Burst stop
X
NOP
X
BST
H
L
BA, CA, A10
BA, CA, A10
BA, RA
BA, A10
X
READ/READA Term burst, new read: Determine AP
6
3
Read
L
WRIT/WRITA
ACT
ILLEGAL
H
H
L
H
L
ILLEGAL
L
PRE/PREA
AREF/SELF
MRS/EMRS
DSL
Term burst, Precharging
ILLEGAL
L
H
L
L
L
Op-Code
X
ILLEGAL
X
X
X
Continue burst to end
L
L
L
L
L
L
L
L
H
H
H
H
L
H
H
L
H
L
X
NOP
BST
Continue burst to end
ILLEGAL
X
H
L
BA, CA, A10
BA, CA, A10
BA, RA
BA, A10
X
READ/READA Term burst, start read: Determine AP
6, 7
6
Write
L
WRIT/WRITA
ACT
Term burst, start read: Determine AP
ILLEGAL
H
H
L
H
L
3
L
PRE/PREA
AREF/SELF
MRS/EMRS
Term burst, Precharging
ILLEGAL
8
L
H
L
L
L
Op-Code
ILLEGAL
Publication Release Date: Nov. 29, 2011
Revision A03
- 18 -
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