參數(shù)資料
型號(hào)： K9F1208U0
廠商： SAMSUNG SEMICONDUCTOR CO. LTD.
英文描述： 64M x 8 Bit NAND Flash Memory
中文描述： 6400 × 8位NAND閃存
文件頁(yè)數(shù)： 14/41頁(yè)
文件大小： 1139K
代理商： K9F1208U0
K9F1208U0M-YCB0, K9F1208U0M-YIB0
FLASH MEMORY
14
NAND Flash Technical Notes
Invalid Block(s)
Invalid blocks are defined as blocks that contain one or more invalid bits whose reliability is not guaranteed by Samsung. The infor-
mation regarding the invalid block(s) is so called as the invalid block information. Devices with invalid block(s) have the same quality
level or as devices with all valid blocks and have the same AC and DC characteristics. An invalid block(s) does not affect the perfor-
mance of valid block(s) because it is isolated from the bit line and the common source line by a select transistor. The system design
must be able to mask out the invalid block(s) via address mapping. The 1st block, which is placed on 00h block address, is fully guar-
anteed to be a valid block, does not require Error Correction.
Identifying Invalid Block(s)
All device locations are erased(FFh) except locations where the invalid block(s) information is written prior to shipping. The invalid
block(s) status is defined by the 6th byte in the spare area. Samsung makes sure that either the 1st or 2nd page of every invalid
block has non-FFh data at the column address of 517. Since the invalid block information is also erasable in most cases, it is impos-
sible to recover the information once it has been erased. Therefore, the system must be able to recognize the invalid block(s) based
on the original invalid block information and create the invalid block table via the following suggested flow chart(Figure 4). Any inten-
tional erasure of the original invalid block information is prohibited.
*
Check "FFh" at the column address 517
of the 1st and 2nd page in the block
Figure 4. Flow chart to create invalid block table.
Start
Set Block Address = 0
Check "FFh"
Increment Block Address
Last Block
End
No
Yes
Yes
Create (or update)
Invalid Block(s) Table
No
相關(guān)PDF資料
PDF描述
K9F1208U0M-YIB0 64M x 8 Bit NAND Flash Memory
K9F1208U0M-YCB0 64M x 8 Bit NAND Flash Memory
K9F1208U0M- 64M x 8 Bit NAND Flash Memory
K9F1216U0A 64M x 8 Bit , 32M x 16 Bit NAND Flash Memory
K9F1208U0A 64M x 8 Bit , 32M x 16 Bit NAND Flash Memory
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
K9F1208U0A 制造商:SAMSUNG 制造商全稱:Samsung semiconductor 功能描述:64M x 8 Bit , 32M x 16 Bit NAND Flash Memory
K9F1208U0A-F 制造商:SAMSUNG 制造商全稱:Samsung semiconductor 功能描述:64M x 8 Bit , 32M x 16 Bit NAND Flash Memory
K9F1208U0A-P 制造商:SAMSUNG 制造商全稱:Samsung semiconductor 功能描述:64M x 8 Bit , 32M x 16 Bit NAND Flash Memory
K9F1208U0A-V 制造商:SAMSUNG 制造商全稱:Samsung semiconductor 功能描述:64M x 8 Bit , 32M x 16 Bit NAND Flash Memory
K9F1208U0A-VIB0T00 制造商:Samsung Semiconductor 功能描述:
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