K4H510438A-TCA0 SAMSUNG [Samsung semiconductor], K4H510438A-TCA0 Datasheet - Page 30
![no-image](/images/no-image-200.jpg)
K4H510438A-TCA0
Manufacturer Part Number
K4H510438A-TCA0
Description
128Mb DDR SDRAM
Manufacturer
SAMSUNG [Samsung semiconductor]
Datasheet
1.K4H510438A-TCA0.pdf
(53 pages)
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*1
128Mb DDR SDRAM
Burst length = 4
*2
READ+AP
Precharge
command
3.3.12 Write with Auto Precharge
command to the same bank should not be issued until the internal precharge is completed. The internal pre-
charge begins after keeping tWR(min).
Asserted
WRITE+
: AP = Auto Precharge
: DM : Refer to " 3.3.7 Write Interrupted by a Read & DM " in page 25.
WRITE
READ
Active
If A10 is high when write command is issued , the write with auto-precharge function is performed. Any new
AP
Command
< Burst Length=4 >
WRITE+
No AP
CK
CK
DQS
DQ s
WRITE+
Illegal
Illegal
Illegal
Illegal
AP
3
BANK A
ACTIVE
*1
0
READ+NO
AP+DM
WRITE+
WRITE+
READ +
AP+DM
No AP
Illegal
Illegal
AP
4
NOP
Table 7. Operating description when new command asserted
1
*2
Figure 20. Write with auto precharge timing
Auto Precharge
WRITE A
READ+NO
For same Bank
WRITE+
WRITE+
READ +
AP+DM
AP+DM
No AP
Illegal
Illegal
while write with auto precharge is issued
AP
2
5
Din 0
NOP
READ +
READ+
- 30 -
NO AP
Illegal
Illegal
Illegal
Illegal
3
AP
Din 1 Din 2 Din 3
6
NOP
READ +
READ+
4
NO AP
Illegal
Illegal
Illegal
Illegal
AP
7
NOP
REV. 1.0 November. 2. 2000
5
Illegal
Illegal
Illegal
Illegal
Illegal
Illegal
8
t
WR
Internal precharge start
NOP
Illegal
Illegal
Legal
Legal
Legal
Legal
6
3
NOP
* Bank can be reactivated at
Illegal
Illegal
Legal
Legal
Legal
Legal
completion of
For Different Bank
4
7
t
Legal
Legal
Legal
Legal
Legal
Legal
RP
NOP
t
5
RP
8
Legal
Legal
Legal
Legal
Legal
Legal
6
Legal
Legal
Legal
Legal
Legal
Legal
7
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