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| 型號(hào)： | KFH4G16D2M-DEB6 |
| 廠商： | SAMSUNG SEMICONDUCTOR CO. LTD. |
| 英文描述： | FLASH MEMORY(54MHz) |
| 中文描述： | 閃存（54MHz之間） |
| 文件頁(yè)數(shù)： | 69/125頁(yè) |
| 文件大?。?/td> | 1657K |
| 代理商： | KFH4G16D2M-DEB6 |
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OneNAND1G(KFG1G16Q2M-DEB5)
FLASH MEMORY
69
OneNAND2G(KFH2G16Q2M-DEB5)
OneNAND4G(KFW4G16Q2M-DEB5)
The OneNAND can be write-protected to prevent re-programming or erasure of data.
The areas of write-protection are
the BootRAM, and the NAND Flash Array.
3.4.1 BootRAM Write Protection Operation
At system power-up, voltage detector in the device detects the rising edge of Vcc and releases the internal power-up reset signal
which triggers bootcode loading. And the designated size data(1KB) is copied from the first page of the first block in the NAND flash
array to the BootRAM.
After the bootcode loading is completed, the BootRAM is always locked to protect the boot code from the accidental write.
3.4.2 NAND Flash Array Write Protection Operation
The device has both hardware and software write protection of the NAND Flash array.
Hardware Write Protection Operation
The hardware write protection operation is implemented by executing a Cold or Warm Reset. On power up, the NAND Flash Array is
in its default, locked state. The entire NAND Flash array goes to a locked state after a Cold or Warm Reset.
Software Write Protection Operation
The software write protection operation is implemented by writing a Lock command (002Ah) or a Lock-tight command (002Ch) to
command register (F220h).
Lock (002Ah) and Lock-tight (002Ch) commands write protects the block defined in the Start Block Address Register F24Ch.
3.4.3 NAND Array Write Protection States
There are three lock states in the NAND Array: unlocked, locked, and locked-tight.
OneNAND1G supports lock/unlock/lock-tight by
one block
, so each block should be locked/unlocked/locked-tight individually.
Write Protection Status
The current block Write Protection status can be read in NAND Flash Write Protection Status Register(F24Eh). There are three bits -
US, LS, LTS -, which are not cleared by hot reset. These Write Protection status registers are updated when FBA is set, and when
Write Protection command is entered.
The followings summarize locking status.
example)
In default, [2:0] values are 010.
-> If host executes unlock block operation, then [2:0] values turn to 100.
-> If host executes lock-tight block operation, then [2:0] values turn to 001.
3.4 Write Protection Operation
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| KFH4G16D2M-DED5 | FLASH MEMORY(54MHz) |
| KFH4G16D2M-DED6 | FLASH MEMORY(54MHz) |
| KFH4G16D2M-DIB5 | FLASH MEMORY(54MHz) |
| KFH4G16D2M-DIB6 | FLASH MEMORY(54MHz) |
| KFH4G16D2M-DID5 | FLASH MEMORY(54MHz) |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| KFH4G16D2M-DED5 | 制造商:SAMSUNG 制造商全稱:Samsung semiconductor 功能描述:FLASH MEMORY(54MHz) |
| KFH4G16D2M-DED6 | 制造商:SAMSUNG 制造商全稱:Samsung semiconductor 功能描述:FLASH MEMORY(54MHz) |
| KFH4G16D2M-DIB5 | 制造商:SAMSUNG 制造商全稱:Samsung semiconductor 功能描述:FLASH MEMORY(54MHz) |
| KFH4G16D2M-DIB6 | 制造商:SAMSUNG 制造商全稱:Samsung semiconductor 功能描述:FLASH MEMORY(54MHz) |
| KFH4G16D2M-DID5 | 制造商:SAMSUNG 制造商全稱:Samsung semiconductor 功能描述:FLASH MEMORY(54MHz) |
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