W987D6HBGX6E-TR Datasheet, PDF (18/68 Pages) Winbond – 128Mb Mobile LPSDR

W987D6HB / W987D2HB
128Mb Mobile LPSDR
Current State CS
H
L
L
RAS
X
H
H
CAS WE
X
X
H
H
H
L
Address
X
X
X
Command
DSL
NOP
BST
Action
Nop → Maintain Row active after tWR
Nop → Maintain Row active after tWR
Nop → Maintain Row active after tWR
Notes
L
H
L
H BS, CA, A10
READ/READA Begin Read
7
Write
recovering
L
H
L
L BS, CA, A10
WRIT/WRITA
Begin new Write
L
L
H
H
BS, RA
ACT
ILLEGAL
3
L
L
H
L
BS, A10
PRE/PREA
ILLEGAL
3
L
L
L
L
L
H
L
L
X
Op-Code
AREF/SELF
MRS/EMRS
ILLEGAL
ILLEGAL
H
X
X
X
X
DSL
Nop → Enter precharge after tWR
L
H
H
H
X
NOP
Nop → Enter precharge after tWR
L
H
H
L
X
BST
Nop → Enter precharge after tWR
Write
L
H
L
H BS, CA, A10
READ/READA ILLEGAL
3
recovering
with auto
L
H
L
L BS, CA, A10
WRIT/WRITA
ILLEGAL
3
precharge
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
L
L
L
L
Op-Code
MRS/EMRS
ILLEGAL
H
X
X
X
X
DSL
Nop → Idle after tRFC
L
H
H
H
X
NOP
Nop → Idle after tRFC
L
H
H
L
X
Refreshing
L
H
L
X
X
BST
READ/WRIT
Nop → Idle after tRFC
ILLEGAL
L
L
H
X
X
ACT/PRE/PREA ILLEGAL
L
L
L
X
X
AREF/SELF/MRS/
EMRS
ILLEGAL
H
X
X
X
X
L
H
H
H
X
DSL
NOP
Nop → Idle after tRSC
Nop → Idle after tRSC
Mode register ^L
H
accessing
L
H
L
L
H
L
L
X
X
X
X
BST
ILLEGAL
X
READ/WRIT
ILLEGAL
ACT/PRE/PREA/
X
AREF/SELF/MRS/ ILLEGAL
EMRS
Note:
1. All entries assume that CKE was active (High level) during the preceding clock cycle and the current clock cycle (CKEn-1 = CKEn = ”1”)
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 tRCD is not satisfied.
5. Illegal if tRAS 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 tWR.
Remark: H = High level, L = Low level, X = High or Low level (Don’t care), V = Valid data
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Publication Release Date: Jun. 09, 2011
Revision A01-002