參數(shù)資料
型號(hào): K4S160822D
廠商: SAMSUNG SEMICONDUCTOR CO. LTD.
英文描述: 2Mx8 SDRAM 1M x 8bit x 2 Banks Synchronous DRAM LVTTL
中文描述: 2Mx8 SDRAM的1M × 8位× 2銀行同步DRAM LVTTL
文件頁(yè)數(shù): 21/46頁(yè)
文件大?。?/td> 1183K
代理商: K4S160822D
K4S160822D
CMOS SDRAM
- 21
Rev. 1.0 (Oct. 1999)
(b) CL=3, BL=4
( Continued )
CLK
i) CMD
DQM
DQ
D
1
D
2
RD
D
3
WR
D
0
D
1
D
2
D
3
D
0
D
1
D
2
D
3
D
0
*Note :
1. To prevent bus contention, DQM should be issued which makes at least one gap between data in and data out.
2. To inhibit invalid write, DQM should be issued.
3. This precharge command and burst write command should be of the same bank, otherwise it is not precharge
interrupt but only the other bank precharge of dual banks operation.
RD
WR
RD
WR
D
1
D
2
D
3
D
0
RD
WR
RD
WR
D
1
D
2
D
3
D
0
Hi-Z
Note 1
ii) CMD
DQM
DQ
iii) CMD
DQM
DQ
iii) CMD
DQM
DQ
iv) CMD
DQM
DQ
Q
0
Hi-Z
5. Write Interrupted by Precharge & DQM
D
0
D
1
D
2
CLK
CMD
DQM
DQ
Masked by DQM
WR
PRE
D
3
Note 3
Note 2
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