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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  
2. DQM Truth Table  
CKE  
/CS  
Command  
Symbol  
n-1  
n
Data Write/Output Enable  
Data Mask/Output Disable  
ENB  
H
H
X
X
H
L
MASK  
Upper Byte Write Enable/Output Enable  
Read  
BSTH  
READ  
READA  
WRIT  
WRITA  
ACT  
H
H
H
H
H
H
H
H
H
X
X
X
X
X
X
X
X
X
L
L
L
L
L
L
L
L
L
Read with Auto Pre-charge  
Write  
Write with Auto Pre-charge  
Bank Activate  
Pre-charge Select Bank  
Pre-charge All Banks  
Mode Register Set  
PRE  
PALL  
MRS  
H = High level, L = Low level, X = High or Low level (Don't care), V = Valid data input  
3. CKE Truth Table  
CKE  
Item  
Command  
Symbol  
/CS /RAS /CAS /WE Addr.  
n-1  
H
n
L
L
Activating  
Any  
Clock Suspend Mode Entry  
Clock Suspend Mode  
X
X
X
X
X
X
X
X
X
X
L
Clock  
Suspend  
Clock Suspend Mode Exit  
L
H
X
X
X
X
X
Idle  
Idle  
CBR Refresh Command  
Self Refresh Entry  
REF  
H
H
L
L
L
L
L
L
L
H
H
H
X
X
X
X
X
X
X
X
X
SELF  
H
L
H
H
L
L
H
X
X
X
H
X
X
X
Self Refresh  
Self Refresh Exit  
L
H
L
H
X
X
Idle  
Power Down Entry  
Power Down Exit  
Power Down  
H
Remark H = High level, L = Low level, X = High or Low level (Don't care)  
May. 2007  
www.eorex.com  
14/19  
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