k4h280438d Samsung Semiconductor, Inc., k4h280438d Datasheet - Page 33

• Manufacturer Part Number: k4h280438d
• Description: 128mb D-die X4/8 Ddr Sdram
• Manufacturer: Samsung Semiconductor, Inc.

128Mb D-die(x4/8) DDR SDRAM
5. Functional Truth Table
Current State
PRECHARGE
STANDBY
STANDBY
ACTIVE
READ
CS
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
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
W E
X
H
H
H
H
H
H
H
H
L
L
L
L
L
L
L
L
L
L
L
Table 9-1. Functional truth table
X
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
- 33 -
1 0
1 0
1 0
1 0
1 0
Burst Stop
READ/WRITE
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. 0.3 Jan.31. 2001
ILLEGAL*2
ILLEGAL*2
Bank Active, Latch RA
ILLEGAL*4
AUTO-Refresh*5
Mode Register Set*5
NOP
Begin Read, Latch CA,
Determine Auto-Precharge
Begin Write, Latch CA,
Determine Auto-Precharge
Bank Active/ILLEGAL*2
Precharge/Precharge All
ILLEGAL
ILLEGAL
Terminate Burst
Terminate Burst, Latch CA,
Begin New Read, Determine
Auto-Precharge*3
ILLEGAL
Bank Active/ILLEGAL*2
Terminate Burst, Precharge
ILLEGAL
ILLEGAL
Action