W9725G6JB Datasheet, PDF (33/87 Pages) Winbond – 4M  4 BANKS  16 BIT DDR2 SDRAM

W9725G6JB
8.4 Function Truth Table
CURRENT
STATE
CS
RAS CAS WE
ADDRESS
COMMAND
ACTION
NOTES
Idle
Banks
Active
Read
H
X
X
X
X
DSL
NOP or Power down
L
H
H
H
X
NOP
NOP or Power down
L
H
L
H BA, CA, A10 READ/READA
ILLEGAL
1
L
H
L
L BA, CA, A10 WRIT/WRITA
ILLEGAL
1
L
L
H
H BA, RA
ACT
Row activating
L
L
H
L BA, A10
PRE/PREA
Precharge/ Precharge all banks
L
L
L
H
X
AREF/SELF
Auto Refresh or Self Refresh
2
L
L
L
L Op-Code
MRS/EMRS
Mode/Extended register
accessing
2
H
X
X
X
X
DSL
NOP
L
H
H
H
X
NOP
NOP
L
H
L
H BA, CA, A10 READ/READA
Begin read
L
H
L
L BA, CA, A10 WRIT/WRITA
Begin write
L
L
H
H BA, RA
ACT
ILLEGAL
1
L
L
H
L BA, A10
PRE/PREA
Precharge/ Precharge all banks
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
L
H BA, CA, A10 READ/READA
Burst interrupt
1, 3
L
H
L
L BA, CA, A10 WRIT/WRITA
ILLEGAL
1
L
L
H
H BA, RA
ACT
ILLEGAL
1
L
L
H
L BA, A10
PRE/PREA
ILLEGAL
1
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
L
H BA, CA, A10 READ/READA
ILLEGAL
1
L
H
L
L BA, CA, A10 WRIT/WRITA
Burst interrupt
1, 3
Write
L
L
H
H BA, RA
ACT
ILLEGAL
1
L
L
H
L BA, A10
PRE/PREA
ILLEGAL
1
L
L
L
H
X
AREF/SELF
ILLEGAL
L
L
L
L Op-Code
MRS/EMRS
ILLEGAL
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Publication Release Date: Nov. 29, 2011
Revision A02