参数资料
型号: W987Y6CBG80
厂商: WINBOND ELECTRONICS CORP
元件分类: DRAM
英文描述: 8M X 16 SYNCHRONOUS DRAM, 6 ns, PBGA54
封装: 8 X 9 MM, 1.20 MM HEIGHT, FBGA-54
文件页数: 35/46页
文件大小: 1634K
代理商: W987Y6CBG80
Preliminary W987Y6CB
- 40 -
Operating Timing Example, contined
Timing Chart of Read to Write Cycle
Note: The Output data must be masked by DQM to avoid I/O conflict
11
10
9
8
7
6
5
4
3
2
1
0
(1) CAS Latency=2
In the case of Burst Length = 4
Read
Write
DQ
( b ) Command
DQM
D0
D1
D2
D3
D0
D1
D2
D3
( a ) Command
(2) CAS Latency=3
Read
Write
Read
Write
D0
D1
D2
D3
( a ) Command
DQ
DQM
( b ) Command
DQM
D0
D1
D2
D3
Timing Chart of Write to Read Cycle
Read
Write
0
11
10
9
8
7
6
5
4
3
2
1
Q0
Read
Q1
Q2
Q3
Read
Write
Q0
Q1
Q2
Q3
Write
Q0
Q1
Q2
Q3
D0
D1
DQ
( a ) Command
DQ
DQM
( b ) Command
DQM
( a ) Command
( b ) Command
DQM
In the case of Burst Length=4
(1) CAS Latency=2
(2) CAS Latency=3
D0
D1
Q0
Q1
Q2
Q3
D0
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