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EM42BM3284LBA_09 参数 Datasheet PDF下载

EM42BM3284LBA_09图片预览
型号: EM42BM3284LBA_09
PDF下载: 下载PDF文件 查看货源
内容描述: 1GB ( 8M × 4Bank × 32 ),双倍数据速率SDRAM [1Gb (8M×4Bank×32) Double DATA RATE SDRAM]
分类和应用: 动态存储器双倍数据速率
文件页数/大小: 24 页 / 1075 K
品牌: EOREX [ EOREX CORPORATION ]
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eorex  
EM42BM3284LBA  
1. Command Truth Table  
CKE  
n-1  
BA0,  
BA1  
Command  
Symbol  
/CS /RAS /CAS /WE  
A10 A12~A0  
n
X
X
X
X
X
X
X
X
X
X
X
Ignore Command  
No Operation  
Burst Stop  
DESL  
NOP  
H
H
H
H
H
H
H
H
H
H
H
H
L
L
L
L
L
L
L
L
L
L
X
H
H
H
H
H
L
X
H
H
L
X
H
L
X
X
X
X
L
X
X
X
V
V
V
V
V
X
X
V
X
BSTH  
READ  
X
Read  
H
H
L
V
Read with Auto Pre-charge READA  
Write WRIT  
Write with Auto Pre-charge WRITA  
L
V
H
L
L
V
H
H
H
H
L
H
H
L
V
H
V
L
Bank Activate  
ACT  
PRE  
PALL  
MRS  
L
V
Pre-charge Select Bank  
Pre-charge All Banks  
Mode Register Set  
L
V
L
L
X
H
L
L
L
L
H = High level, L = Low level, X = High or Low level (Don't care), V = Valid data input  
2. CKE Truth Table  
CKE  
Item  
Command  
Symbol  
/CS /RAS /CAS /WE Addr.  
n-1  
H
n
H
L
Idle  
Idle  
CBR Refresh Command  
Self Refresh Entry  
REF  
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)  
Feb. 2009  
www.eorex.com  
12/24  
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