K4H510438A-TCA0 SAMSUNG [Samsung semiconductor], K4H510438A-TCA0 Datasheet - Page 35

• Manufacturer Part Number: K4H510438A-TCA0
• Description: 128Mb DDR SDRAM
• Manufacturer: SAMSUNG [Samsung semiconductor]

128Mb DDR SDRAM
PRECHARGE
Current State
RECHARGE
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
WE
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 MRS
10
10
10
Address
- 35 -
10
10
10
10
10
10
Burst Stop
READ/READA
WRITE/WRITEA
Active
PRE/PREA
Refresh
MRS
Burst Stop
READ/READA
WRITE/WRITEA ILLEGAL
Active
PRE/PREA
Refresh
MRS
Burst Stop
READ/READA
WRITE/WRITEA *7
Active
PRE/PREA
Refresh
Command
REV. 1.0 November. 2. 2000
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
*6
*6
ILLEGAL
ILLEGAL
ILLEGAL
*7
*7
*7
ILLEGAL
ILLEGAL
Action