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MT48H16M32LFCM-75L 参数 Datasheet PDF下载

MT48H16M32LFCM-75L图片预览
型号: MT48H16M32LFCM-75L
PDF下载: 下载PDF文件 查看货源
内容描述: 512MB :梅格32 ×16 , 16兆×32移动SDRAM [512Mb: 32 Meg x 16, 16 Meg x 32 Mobile SDRAM]
分类和应用: 内存集成电路动态存储器时钟
文件页数/大小: 73 页 / 2407 K
品牌: MICRON [ MICRON TECHNOLOGY ]
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512Mb : 32 Me g x 16, 16 Me g x 32 Mo b ile SDRAM  
Op e ra t io n s  
WRITEs  
WRITE bursts are initiated with a WRITE command, as shown in Figure 18.  
The starting column and bank addresses are provided with the WRITE command, and  
auto precharge is either enabled or disabled for that access. If auto precharge is enabled,  
the row being accessed is precharged at the completion of the burst. For the generic  
WRITE commands used in the following illustrations, auto precharge is disabled.  
During WRITE bursts, the first valid data-in element will be registered coincident with  
the WRITE command. Subsequent data elements will be registered on each successive  
positive clock edge. Upon completion of a fixed-length burst, assuming no other  
commands have been initiated, the DQs will remain High-Z and any additional input  
data will be ignored (see Figure 19 on page 31).  
Fig u re 18: WRITE Co m m a n d  
CLK  
CKE HIGH  
CS#  
RAS#  
CAS#  
WE#  
COLUMN  
ADDRESS  
A0–A8  
A9, A11, A12  
EN AP  
DIS AP  
A101  
BANK  
ADDRESS  
BA0, BA1  
VALID ADDRESS  
DON’T CARE  
Notes: 1. EN AP = enable auto precharge  
DIS AP = disable auto precharge  
Data for any WRITE burst may be truncated with a subsequent WRITE command, and  
data for a fixed-length WRITE burst may be immediately followed by data for a WRITE  
command. The new WRITE command can be issued on any clock following the previous  
WRITE command, and the data provided coincident with the new command applies to  
the new command. An example is shown in Figure 20 on page 31. Data n + 1 is either the  
last of a burst of two or the last desired of a longer burst. The 512Mb SDRAM uses a pipe-  
lined architecture and therefore does not require the 2n rule associated with a prefetch  
architecture. A WRITE command can be initiated on any clock cycle following a previous  
PDF: 09005aef81ca5de4/Source: 09005aef81ca5e03  
MT48H32M16LF_1.fm - Rev. H 6/07 EN  
Micron Technology, Inc., reserves the right to change products or specifications without notice.  
30  
©2005 Micron Technology, Inc. All rights reserved.