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M52D128168A-7TG 参数 Datasheet PDF下载

M52D128168A-7TG图片预览
型号: M52D128168A-7TG
PDF下载: 下载PDF文件 查看货源
内容描述: 2M ×16位×4手机银行同步DRAM [2M x 16 Bit x 4 Banks Mobile Synchronous DRAM]
分类和应用: 存储内存集成电路光电二极管动态存储器手机
文件页数/大小: 48 页 / 1178 K
品牌: ESMT [ ELITE SEMICONDUCTOR MEMORY TECHNOLOGY INC. ]
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ESMT  
M52D128168A  
Power Up Sequence  
13  
14  
15  
16  
17  
18  
19  
20  
0
1
2
3
4
5
6
7
8
9
11  
12  
10  
C L O C K  
C K E  
H i g h l e v e l i s n e c e s s a r y  
C S  
t
R F C  
t
R F C  
t
R P  
t
M R D  
t
M R D  
R A S  
C A S  
A D D R  
K e y  
K e y  
R A  
B A 1  
B A 0  
B S  
B S  
R A  
A10/AP  
H i g h - Z  
D Q  
W E  
D QM  
H i g h l e v e l i s n e c e s s a r y  
M o d e R e g i s t e r S e t  
A u t o R e f r e s h  
A u t o R e f r e s h  
P r e c h a r g e  
( A l l B a n k s )  
R o w A c t i v e  
E x t e n d e d M o d e  
R e g i s t e r S e t  
:
D o n ' t c a r e  
Power-Up and Initialization Sequence  
The following sequence is required for POWER UP and Initialization.  
1. Apply power and attempt to maintain CKE at a low state (all other inputs may be undefined.)  
-
-
Apply VDD before or at the same time as VDDQ  
Apply VDDQ  
2. Start clock and maintain stable condition for a minimum.  
3. The minimum of 200us after stable power and clock (CLK), apply NOP & take CKE high.  
4. Issue precharge commands for all banks of the device.  
5. Issue 2 or more auto-refresh commands.  
6. Issue mode register set command to initialize the mode register.  
7. Issue extended mode register set command to set PASR and DS.  
Elite Semiconductor Memory Technology Inc.  
Publication Date: Aug. 2009  
Revision: 1.3  
31/48  
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