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MBM29F040C-90 参数 Datasheet PDF下载

MBM29F040C-90图片预览
型号: MBM29F040C-90
PDF下载: 下载PDF文件 查看货源
内容描述: 闪存4M ( 512K ×8 )位 [FLASH MEMORY 4M (512K x 8) BIT]
分类和应用: 闪存
文件页数/大小: 41 页 / 423 K
品牌: SPANSION [ SPANSION ]
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MBM29F040C-55/-70/-90  
GENERAL DESCRIPTION  
The MBM29F040C is a 4M-bit, 5.0 V-only Flash memory organized as 512K bytes of 8 bits each. The  
MBM29F040C is offered in a 32-pin PLCC and 32-pin TSOP(I) package. This device is designed to be  
programmed in-system with the standard system 5.0 V VCC supply. A 12.0 V VPP is not required for write or erase  
operations. The device can also be reprogrammed in standard EPROM programmers.  
The standard MBM29F040C offers access times 55 ns and 90 ns, allowing operation of high-speed  
microprocessors without wait states. To eliminate bus contention the device has separate chip enable (CE), write  
enable (WE), and output enable (OE) controls.  
The MBM29F040C is pin and command set compatible with JEDEC standard E2PROMs. Commands are written  
to the command register using standard microprocessor write timings. Register contents serve as input to an  
internal state-machine which controls the erase and programming circuitry. Write cycles also internally latch  
addresses and data needed for the programming and erase operations. Reading data out of the device is similar  
to reading from 12.0 V Flash or EPROM devices.  
TheMBM29F040Cisprogrammedbyexecutingtheprogramcommandsequence. ThiswillinvoketheEmbedded  
Program Algorithm which is an internal algorithm that automatically times the program pulse widths and verifies  
proper cell margin. Typically, each sector can be programmed and verified in less than 0.5 seconds. Erase is  
accomplished by executing the erase command sequence. This will invoke the Embedded Erase Algorithm which  
is an internal algorithm that automatically preprograms the array if it is not already programmed before executing  
the erase operation. During erase, the device automatically times the erase pulse widths and verifies proper cell  
margin.  
Any individual sector is typically erased and verified in 1 second. (If already completely preprogrammed.)  
The device also features a sector erase architecture. The sector mode allows for 64K byte sectors of memory  
to be erased and reprogrammed without affecting other sectors. The MBM29F040C is erased when shipped  
from the factory.  
The device features single 5.0 V power supply operation for both read and write functions. Internally generated  
and regulated voltages are provided for the program and erase operations. A low VCC detector automatically  
inhibits write operations on the loss of power. The end of program or erase is detected by Data Polling of DQ7  
or by the Toggle Bit feature on DQ6. Once the end of a program or erase cycle has been completed, the device  
internally resets to the read mode.  
Fujitsu's Flash technology combines years of EPROM and E2PROM experience to produce the highest levels  
of quality, reliability and cost effectiveness. The MBM29F040C memory electrically erases the entire chip or all  
bits within a sector simultaneously via Fowler-Nordheim tunneling. The bytes are programmed one byte at a  
time using the EPROM programming mechanism of hot electron injection.  
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