W989D6DB Datasheet, PDF (11/64 Pages) Winbond – Standard Self Refresh Mode

W989D6DB / W989D2DB
7.1.2 Functional Truth Table (See Note 1)
Current
State
Idle
Row active
Read
CS RAS CAS W E ^Address
Command
Action
H
X
X
X
X
DSL
Nop
L
H
H
X
X
NOP/BST Nop
L
H
L
H BA, CA, A10 READ/READA ILLEGAL
L
H
L
L BA, CA, A10 WRIT/WRITA ILLEGAL
L
L
H
H
BA, RA
ACT
Row activating
L
L
H
L
BA, A10
PRE/PREA Nop
L
L
L
H
X
AREF/SELF Refresh or Self refresh
L
L
L
L
Op-Code
MRS/EMRS Mode register accessing
H
X
X
X
X
DSL
Nop
L
H
H
X
X
NOP/BST Nop
L
H
L
H BA, CA, A10 READ/READA Begin read: Determine AP
L
H
L
L BA, CA, A10 WRIT/WRITA Begin write: Determine AP
L
L
H
H
BA, RA
ACT
ILLEGAL
L
L
H
L
BA, A10
PRE/PREA Precharge
L
L
L
H
X
AREF/SELF ILLEGAL
L
L
L
L
Op-Code
MRS/EMRS ILLEGAL
H
X
X
X
X
DSL
Continue burst to end
L
H
H
H
X
NOP
Continue burst to end
L
H
H
L
X
BST
Burst stop
L
H
L
H
BA, CA, A10
READ/READA
Term burst, new read: Determine
AP
L
H
L
L
BA, CA, A10
WRIT/WRITA
Term burst, begin write:
Determine AP
L
L
H
H
BA, RA
ACT
ILLEGAL
L
L
H
L
BA, A10
PRE/PREA Term burst, precharging
L
L
L
H
X
AREF/SELF ILLEGAL
L
L
L
L
Op-Code
MRS/EMRS ILLEGAL
H
X
X
X
X
DSL
Continue burst to end.
L
H
H
H
X
NOP
Continue burst to end
L
H
H
L
X
BST
Burst stop, row active
L
H
L
H
BA, CA, A10
READ/READA
Term burst, start read: Determine
AP
Write
L
H
L
L
BA, CA, A10
WRIT/WRITA
Term burst, new write: Determine
AP
L
L
H
H
BA, RA
ACT
ILLEGAL
L
L
H
L
BA, A10
PRE/PREA Term burst. precharging
L
L
L
H
X
AREF/SELF ILLEGAL
L
L
L
L
Op-Code
MRS/EMRS ILLEGAL
Notes
3
3
2
2
4
4
3
5
6
6, 7
3
6, 7
6
3
8
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Publication Release Date: Mar. 19, 2014
Revision: A01-001