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EM482M3244VBC-8FE 参数 Datasheet PDF下载

EM482M3244VBC-8FE图片预览
型号: EM482M3244VBC-8FE
PDF下载: 下载PDF文件 查看货源
内容描述: 256MB ( 2M × 4Bank × 32 )同步DRAM [256Mb (2M】4Bank】32) Synchronous DRAM]
分类和应用: 动态存储器
文件页数/大小: 19 页 / 1127 K
品牌: EOREX [ EOREX CORPORATION ]
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eorex  
Preliminary  
EM488M3244VBC  
5. Command Truth Table for CKE  
CKE  
Current State  
/CS /R /C /W  
Addr.  
X
Action  
n-1  
n
INVALID, CLK(n-1) would exit self  
refresh  
H
X
X
X
X
X
L
L
L
L
L
H
H
H
H
H
H
H
H
H
H
H
H
L
H
H
H
H
L
H
L
L
L
X
H
L
L
L
H
L
L
L
X
H
H
L
X
X
H
H
L
X
H
H
L
X
H
L
X
X
X
H
L
X
X
H
L
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
Self refresh recovery  
Self refresh recovery  
ILLEGAL  
ILLEGAL  
Maintain self refresh  
Idle after tRC  
Idle after tRC  
ILLEGAL  
ILLEGAL  
ILLEGAL  
Self Refresh  
Self Refresh  
Recovery  
L
L
L
ILLEGAL  
ILLEGAL  
ILLEGAL  
X
INVALID, CLK(n-1) would exit  
power down  
Exit power down Idle  
Maintain power down mode  
H
X
X
X
X
X
X
Power Down  
L
L
H
L
X
X
H
L
L
L
L
H
L
X
X
X
H
L
L
L
X
H
L
X
X
X
X
H
L
X
X
X
X
X
H
L
X
X
X
X
X
H
H
H
H
H
H
H
H
H
H
H
H
H
L
L
L
L
Refer to operations in Operative  
Command Table  
X
Refresh  
L
Op-Code  
Refer to operations in Operative  
Command Table  
X
X
H
Both Banks  
Idle  
L
Self refresh (Note 17)  
Refer to operations in Operative  
Command Table  
Power down (Note 17)  
Refer to operations in Operative  
Command Table  
Power down (Note 17)  
Refer to operations in Operative  
Command Table  
H
H
L
L
L
L
H
X
L
L
L
L
L
Op-Code  
X
X
X
H
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
H
L
Row Active  
H
Begin clock suspend next cycle  
(Note 18)  
Any State Other  
than Listed above  
H
L
X
X
X
X
X
L
L
H
L
X
X
X
X
X
X
X
X
X
X
Exit clock suspend next cycle  
Maintain clock suspend  
Remark: H = High level, L = Low level, X = High or Low level (Don't care)  
Notes 17: Self refresh can be entered only from the both banks idle state.  
Power down can be entered only from both banks idle or row active state.  
Notes 18: Must be legal command as defined in Operative Command Table  
May. 2007  
www.eorex.com  
18/19  
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