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M29W400DT70ZA1 参数 Datasheet PDF下载

M29W400DT70ZA1图片预览
型号: M29W400DT70ZA1
PDF下载: 下载PDF文件 查看货源
内容描述: 4兆位( 512 KB ×8或256 KB ×16 ,引导块) 3 V电源闪存 [4 Mbit (512 Kb x 8 or 256 Kb x 16, boot block) 3 V supply Flash memory]
分类和应用: 闪存
文件页数/大小: 48 页 / 1025 K
品牌: NUMONYX [ NUMONYX B.V ]
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Description  
M29W400DT, M29W400DB  
1
Description  
The M29W400D is a 4 Mbit (512 K x 8 or 256 K x 16) non-volatile memory that can be read,  
erased and reprogrammed. These operations can be performed using a single low voltage  
(2.7 to 3.6 V) supply. On power-up the memory defaults to its Read mode where it can be  
read in the same way as a ROM or EPROM.  
The memory is divided into blocks that can be erased independently so it is possible to  
preserve valid data while old data is erased. Each block can be protected independently to  
prevent accidental Program or Erase commands from modifying the memory. Program and  
Erase commands are written to the command interface of the memory. An on-chip  
Program/Erase controller simplifies the process of programming or erasing the memory by  
taking care of all of the special operations that are required to update the memory contents.  
The end of a program or erase operation can be detected and any error conditions  
identified. The command set required to control the memory is consistent with JEDEC  
standards.  
The blocks in the memory are asymmetrically arranged, see Figure 5 and Figure 6, Block  
addresses. The first or last 64 Kbytes have been divided into four additional blocks. The  
16 Kbyte boot block can be used for small initialization code to start the microprocessor, the  
two 8 Kbyte parameter blocks can be used for parameter storage and the remaining  
32 Kbyte is a small main block where the application may be stored.  
Chip Enable, Output Enable and Write Enable signals control the bus operation of the  
memory. They allow simple connection to most microprocessors, often without additional  
logic.  
The memory is offered in SO44, TSOP48 (12 x 20 mm), TFBGA48 0.8 mm pitch (6 x 9 mm  
and 6 x 8 mm) packages. The memory is supplied with all the bits erased (set to ’1’).  
In order to meet environmental requirements, Numonyx offers the M29W400D in  
®
ECOPACK packages. ECOPACK packages are Lead-free. The category of second level  
interconnect is marked on the package and on the inner box label, in compliance with  
JEDEC Standard JESD97. The maximum ratings related to soldering conditions are also  
marked on the inner box label.  
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