W9425G6JH_13 Datasheet, PDF (18/52 Pages) Winbond – 4 M x 4 BANKS x 16 BITS DDR SDRAM

W9425G6JH
9.2 Function Truth Table
(Note 1)
CURRENT
STATE
Idle
Row Active
CS RAS CAS W E ADDRESS
H X X XX
L H H XX
L H L H BA, CA, A10
L H L L BA, CA, A10
L L H H BA, RA
L L H L BA, A10
L L L HX
L L L L Op-Code
H X X XX
L H H XX
L H L H BA, CA, A10
L H L L BA, CA, A10
L L H H BA, RA
L L H L BA, A10
L L L HX
L L L L Op-Code
Read
H X X XX
L H H HX
L H H LX
L H L H BA, CA, A10
L H L L BA, CA, A10
L L H H BA, RA
L L H L BA, A10
L L L HX
L L L L Op-Code
H X X XX
L H H HX
L H H LX
L H L H BA, CA, A10
Write
L H L L BA, CA, A10
L L H H BA, RA
L L H L BA, A10
L L L HX
L L L L Op-Code
COMMAND
DSL
NOP/BST
READ/READA
WRIT/WRITA
ACT
PRE/PREA
AREF/SELF
MRS/EMRS
DSL
NOP/BST
READ/READA
WRIT/WRITA
ACT
PRE/PREA
AREF/SELF
MRS/EMRS
DSL
NOP
BST
READ/READA
WRIT/WRITA
ACT
PRE/PREA
AREF/SELF
MRS/EMRS
DSL
NOP
BST
READ/READA
WRIT/WRITA
ACT
PRE/PREA
AREF/SELF
MRS/EMRS
ACTION
NOP
NOP
ILLEGAL
ILLEGAL
Row activating
NOP
Refresh or Self refresh
Mode register accessing
NOP
NOP
Begin read: Determine AP
Begin write: Determine AP
ILLEGAL
Precharge
ILLEGAL
ILLEGAL
Continue burst to end
Continue burst to end
Burst stop
Term burst, new read: Determine AP
ILLEGAL
ILLEGAL
Term burst, precharging
ILLEGAL
ILLEGAL
Continue burst to end
Continue burst to end
ILLEGAL
Term burst, start read: Determine AP
Term burst, start read: Determine AP
ILLEGAL
Term burst, precharging
ILLEGAL
ILLEGAL
NOTES
3
3
2
2
4
4
3
5
6
3
6, 7
6
3
8
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Publication Release Date: Aug. 27, 2013
Revision A03