k4h281638d Samsung Semiconductor, Inc., k4h281638d Datasheet - Page 35

• Manufacturer Part Number: k4h281638d
• Description: 128mb D-die X16 Ddr Sdram
• Manufacturer: Samsung Semiconductor, Inc.

128Mb D-die(x16) DDR SDRAM
PRECHARGE
RECHARGE
Current State
WRITE with
READ with
(WRITEA)
(READA)
WRITE
AUTO
AUTO
*7
*6
CS
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
RAS CAS
H
H
H
H
H
H
H
H
H
L
L
L
L
L
L
L
L
L
L
L
L
H
H
H
H
H
H
H
H
H
L
L
L
L
L
L
L
L
L
L
L
L
W E
H
H
H
H
H
H
H
H
H
L
L
L
L
L
L
L
L
L
L
L
L
Table 9-2. Functional truth table
X
BA, CA, A
BA, CA, A
BA, RA
BA, A
X
Op-Code, Mode-Add
X
BA, CA, A
BA, CA, A
BA, RA
BA, A
X
Op-Code, Mode-Add
X
BA, CA, A
BA, CA, A
BA, RA
BA, A
X
Op-Code, Mode-Add
10
10
10
Address
- 35 -
1 0
1 0
1 0
1 0
1 0
1 0
Burst Stop
READ/READA
WRITE/WRITEA
Active
PRE/PREA
Refresh
MRS
Burst Stop
READ/READA
WRITE/WRITEA
Active
PRE/PREA
Refresh
MRS
Burst Stop
READ/READA
WRITE/WRITEA
Active
PRE/PREA
Refresh
MRS
Command
REV. 0.6 Oct. 21. 2002
ILLEGAL
Terminate Burst With DM=High,
Latch CA, Begin Read, Deter-
mine Auto-Precharge*3
Terminate Burst, Latch CA,
Begin new Write, Determine
Auto-Precharge*3
Bank Active/ILLEGAL*2
Terminate Burst With DM=High,
Precharge
ILLEGAL
ILLEGAL
ILLEGAL
*6
ILLEGAL
*6
*6
ILLEGAL
ILLEGAL
ILLEGAL
*7
*7
*7
*7
ILLEGAL
ILLEGAL
Action