W9425G6EH-5 Winbond Electronics, W9425G6EH-5 Datasheet - Page 21

• Manufacturer Part Number: W9425G6EH-5
• Description: IC DDR-400 SDRAM 256MB 66TSSOPII
• Manufacturer: Winbond Electronics

Specifications of W9425G6EH-5

• Format - Memory: RAM
• Memory Type: DDR SDRAM
• Memory Size: 256M (16Mx16)
• Speed: 250MHz
• Interface: Parallel
• Voltage - Supply: 2.3 V ~ 2.7 V
• Operating Temperature: 0°C ~ 70°C
• Package / Case: 66-TSOPII
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Function Truth Table, continued
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 (BA), depending on the
4. Illegal if t
5. Illegal if t
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
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
state of that bank.
RCD
RAS
CS
is not satisfied.
is not satisfied.
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
RAS CAS
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
BA, CA, A10
BA, CA, A10
BA, RA
BA, A10
X
Op-Code
X
X
X
BA, CA, A10
BA, CA, A10
BA, RA
BA, 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/EMRS
DSL
NOP
BST
READ/WRIT
ACT/PRE/PREA/ARE
F/SELF/MRS/EMRS
- 21 -
COMMAND
Publication Release Date:Dec. 03, 2008
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
W9425G6EH
RC
RC
MRD
MRD
WR
WR
Revision A08
WR
WR
NOTES
3
3
3
3
3
3
3
3