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MT48LC4M16A2P-75G 参数 Datasheet PDF下载

MT48LC4M16A2P-75G图片预览
型号: MT48LC4M16A2P-75G
PDF下载: 下载PDF文件 查看货源
内容描述: SDR SDRAM MT48LC16M4A2 â ????梅格4 ×4× 4银行MT48LC8M8A2 â ???? 2梅格×8× 4银行MT48LC4M16A2 â ???? 1梅格×16× 4银行 [SDR SDRAM MT48LC16M4A2 – 4 Meg x 4 x 4 Banks MT48LC8M8A2 – 2 Meg x 8 x 4 Banks MT48LC4M16A2 – 1 Meg x 16 x 4 Banks]
分类和应用: 动态存储器
文件页数/大小: 83 页 / 3595 K
品牌: MICRON [ MICRON TECHNOLOGY ]
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64Mb: x4, x8, x16 SDRAM  
Mode Register  
Burst Length  
Read and write accesses to the device are burst oriented, and the burst length (BL) is  
programmable. The burst length determines the maximum number of column loca-  
tions that can be accessed for a given READ or WRITE command. Burst lengths of 1, 2,  
4, 8, or continuous locations are available for both the sequential and the interleaved  
burst types, and a continuous page burst is available for the sequential type. The con-  
tinuous page burst is used in conjunction with the BURST TERMINATE command to  
generate arbitrary burst lengths.  
Reserved states should not be used, as unknown operation or incompatibility with fu-  
ture versions may result.  
When a READ or WRITE command is issued, a block of columns equal to the burst  
length is effectively selected. All accesses for that burst take place within this block,  
meaning that the burst wraps within the block when a boundary is reached. The block  
is uniquely selected by A[8:1] when BL = 2, A[8:2] when BL = 4, and A[8:3] when BL = 8.  
The remaining (least significant) address bit(s) is (are) used to select the starting loca-  
tion within the block. Continuous page bursts wrap within the page when the boundary  
is reached.  
Burst Type  
Accesses within a given burst can be programmed to be either sequential or interleaved;  
this is referred to as the burst type and is selected via bit M3.  
The ordering of accesses within a burst is determined by the burst length, the burst  
type, and the starting column address.  
PDF: 09005aef80725c0b  
64mb_x4x8x16_sdram.pdf - Rev. U 05/13 EN  
Micron Technology, Inc. reserves the right to change products or specifications without notice.  
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© 1999 Micron Technology, Inc. All rights reserved.