W942508CH-5 WINBOND [Winbond], W942508CH-5 Datasheet - Page 18

• Manufacturer Part Number: W942508CH-5
• Description: 8M x 4 BANKS x 8 BIT DDR SDRAM
• Manufacturer: WINBOND [Winbond]

Function Truth Table, continued
Notes :
1.
2.
3.
4.
5.
6.
7.
8.
Remark: H = High level, L = Low level, X = High or Low level (Don’t care), V = Valid data
Write
Recovering
Write
Recovering
with Auto
Precharge
Refreshing
Mode
Register
Accessing
CURRENT
STATE
All entries assume that CKE was active (High level) during the preceding clock cycle and the current clock cycle.
Illegal if any bank is not idle.
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.
Illegal if t
Illegal if t
Must satisfy burst interrupt condition.
Must avoid bus contention, bus turn around, and/or satisfy write recovery requirements.
Must mask preceding data which don’t satisfy t
RCD
RAS
CS RAS CAS
H
H
H
H
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
is not satisfied.
is not satisfied.
X
H
H
H
H
X
H
H
H
H
X
H
H
H
X
H
H
H
L
L
L
L
L
L
L
L
L
L
L
X
H
H
H
H
X
H
H
H
H
X
H
H
H
X
H
H
X
L
L
L
L
L
L
L
L
L
L
L
WE
H
H
H
H
H
H
H
H
H
H
H
X
X
X
X
X
X
X
X
L
L
L
L
L
L
L
L
L
L
X
X
X
BS, CA, A10
BS, CA, A10
BS, RA
BS, A10
X
Op-Code
X
X
X
BS, CA, A10
BS, CA, A10
BS, RA
BS, A10
X
Op-Code
X
X
X
X
X
X
X
X
X
X
X
ADDRESS
WR
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/WRIT
ACT/PRE/PREA
AREF/SELF/MRS/EM
DSL
NOP
BST
READ/WRIT
ACT/PRE/PREA/ARE
F/SELF/MRS/EMRS
- 18 -
COMMAND
Nop -> Row active after t
Nop -> Row active after t
ILLEGAL
ILLEGAL
ILLEGAL
ILLEGAL
ILLEGAL
ILLEGAL
ILLEGAL
Nop -> Enter precharge after t
Nop -> Enter precharge after t
ILLEGAL
ILLEGAL
ILLEGAL
ILLEGAL
ILLEGAL
ILLEGAL
ILLEGAL
Nop -> Idle after t
Nop -> Idle after t
ILLEGAL
ILLEGAL
ILLEGAL
ILLEGAL
Nop -> Row after t
Nop -> Row after t
ILLEGAL
ILLEGAL
ILLEGAL
ACTION
W942508CH
RC
RC
MRD
MRD
WR
WR
WR
WR
NOTES
3
3
3
3
3
3
3
3