W9412G6CH
Publication Release Date: Jul. 04, 2007
- 21 - Revision A06
Function Truth Table, continued
Current
State
CS
RAS CAS
WE
Address Command Action NOTES
H X X X X DSL NOP->Row active after tWR
L H H H X NOP NOP->Row active after tWR
L H H L X BST ILLEGAL
L H L H BS, CA, A10 READ/READA ILLEGAL 3
L H L L BS, CA, A10 WRIT/WRITA ILLEGAL 3
L L H H BS, RA ACT ILLEGAL 3
L L H L BS, A10 PRE/PREA ILLEGAL 3
L L L H X AREF/SELF ILLEGAL
Write
Recovering
L L L L Op-Code MRS/EMRS ILLEGAL
H X X X X DSL
NOP
->Enter precharge after
t
WR
L H H H X NOP
NOP
->Enter precharge after
t
WR
L H H L X BST ILLEGAL
L H L H BS, CA, A10 READ/READA ILLEGAL 3
L H L L BS, CA, A10 WRIT/WRITA ILLEGAL 3
L L H H BS, RA ACT ILLEGAL 3
L L H L BS, A10 PRE/PREA ILLEGAL 3
L L L H X AREF/SELF ILLEGAL
Write
Recovering
with Auto-
precharge
L L L L Op-Code MRS/EMRS ILLEGAL
H X X X X DSL NOP->Idle after TRC
L H H H X NOP NOP->Idle after TRC
L H H L X BST ILLEGAL
L H L H X READ/WRIT ILLEGAL
L L H X X ACT/PRE/PREA ILLEGAL
Refreshing
L L L X X
AREF/SELF/MRS/EMRS
ILLEGAL
H X X X X DSL NOP->Row after tMRD
L H H H X NOP NOP->Row after tMRD
L H H L X BST ILLEGAL
L H L X X READ/WRIT ILLEGAL
Mode
Register
Accessing
L L X X X
ACT/PRE/PREA/ARE
F/SELF/MRS/EMRS
ILLEGAL
Notes:
1. All entries assume that CKE was active (High level) during the preceding clock cycle and the current clock cycle.
2. Illegal if any bank is not idle.
3. Illegal to bank in specified states; Function may be legal in the bank indicated by Bank Address (BS), depending on the
state of that bank.
4. Illegal if t
RCD is not satisfied.
5. Illegal if t
RAS is not satisfied.
6. Must satisfy burst interrupt condition.
7. Must avoid bus contention, bus turn around, and/or satisfy write recovery requirements.
8. Must mask preceding data which don’t satisfy t
WR
Remark: H = High level, L = Low level, X = High or Low level (Don’t Care), V = Valid data
