參數(shù)資料
型號: WED3DL644V10BC
廠商: WHITE ELECTRONIC DESIGNS CORP
元件分類: DRAM
英文描述: 4M X 64 SYNCHRONOUS DRAM, 7 ns, PBGA153
封裝: 17 X 23 MM, BGA-153
文件頁數(shù): 17/28頁
文件大?。?/td> 918K
代理商: WED3DL644V10BC
24
White Electronic Designs Corporation (602) 437-1520 www.wedc.com
White Electronic Designs
WED3DL644V
August 2005
Rev. 6
FIG. 15 ACTIVE/PRECHARGE POWER DOWN MODE @CAS LATENCY=2, BURST LENGTH=4
NOTES:
1.
Both banks should be in idle state prior to entering precharge power down mode.
2.
CKE should be set high at least 1 CK + tSS prior to Row active command.
3.
Cannot violate minimum refresh specication (64ms).
RAS#
CAS#
ADDR
BA
DQM
A10/AP
CKE
CLOCK
CE#
Ra
Ca
DQ
Precharge
Read
Row Active
Precharge
Power-Down
Entry
Precharge
Power-Down
Exit
Active
Power-Down
Entry
Active
Power-Down
Exit
WE#
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
Note 3
Note 2
tSS
DON'T CARE
tSS
tSHZ
Note 1
Ra
Qa1
Qa0
Qa2
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