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參數(shù)資料
| 型號： | NAND512W3A2CZA6E |
| 廠商： | 意法半導體 |
| 英文描述： | 512 Mbit, 528 Byte/264 Word Page, 1.8V/3V, NAND Flash Memories |
| 中文描述： | 512兆位，528 Byte/264字的頁面，1.8V/3V，NAND閃存芯片 |
| 文件頁數(shù)： | 24/51頁 |
| 文件大?。?/td> | 517K |
| 代理商： | NAND512W3A2CZA6E |
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Software algorithms
NAND512-A2C
30/51
7.3
Garbage Collection
When a data page needs to be modified, it is faster to write to the first available page, and
the previous page is marked as invalid. After several updates it is necessary to remove
invalid pages to free some memory space.
To free this memory space and allow further program operations it is recommended to
implement a Garbage Collection algorithm. In a Garbage Collection software the valid
pages are copied into a free area and the block containing the invalid pages is erased (see
Figure 14).
Figure 14.
Garbage Collection
7.4
Wear-leveling algorithm
For write-intensive applications, it is recommended to implement a Wear-leveling Algorithm
to monitor and spread the number of write cycles per block.
In memories that do not use a Wear-Leveling Algorithm not all blocks get used at the same
rate. Blocks with long-lived data do not endure as many write cycles as the blocks with
frequently-changed data.
The Wear-leveling Algorithm ensures that equal use is made of all the available write cycles
for each block. There are two wear-leveling levels:
●
First Level Wear-leveling, new data is programmed to the free blocks that have had the
fewest write cycles
●
Second Level Wear-leveling, long-lived data is copied to another block so that the
original block can be used for more frequently-changed data.
The Second Level Wear-leveling is triggered when the difference between the maximum
and the minimum number of write cycles per block reaches a specific threshold.
7.5
Error Correction Code
An Error Correction Code (ECC) can be implemented in the Nand Flash memories to
identify and correct errors in the data.
For every 2048 bits in the device it is recommended to implement 22 bits of ECC (16 bits for
line parity plus 6 bits for column parity).
Valid
Page
Invalid
Page
Free
Page
(Erased)
Old Area
AI07599B
New Area (After GC)
相關PDF資料 |
PDF描述 |
|---|---|
| NAND512W3A2C | 512 Mbit, 528 Byte/264 Word Page, 1.8V/3V, NAND Flash Memories |
| NAT-3DC-2A+ | 1000 MHz - 3500 MHz RF/MICROWAVE FIXED ATTENUATOR |
| NC26SM-SLF-0.032768MHZ-EZM12510 | QUARTZ CRYSTAL RESONATOR, 0.032768 MHz |
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相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| NAND512W3A2DDI6 | 制造商:Micron Technology Inc 功能描述:NAND - Gel-pak, waffle pack, wafer, diced wafer on film |
| NAND512W3A2DN6E | 功能描述:IC FLASH 512MBIT 48TSOP RoHS:是 類別:集成電路 (IC) >> 存儲器 系列:- 標準包裝:1,000 系列:- 格式 - 存儲器:EEPROMs - 串行 存儲器類型:EEPROM 存儲容量:4K (512 x 8) 速度:400kHz 接口:I²C，2 線串口 電源電壓:2.7 V ~ 5.5 V 工作溫度:-40°C ~ 85°C 封裝/外殼:8-SOIC（0.173"，4.40mm 寬） 供應商設備封裝:8-MFP 包裝:帶卷 (TR) |
| NAND512W3A2DZA6E | 功能描述:IC FLASH 512MBIT 63VFBGA RoHS:是 類別:集成電路 (IC) >> 存儲器 系列:- 標準包裝:1,000 系列:- 格式 - 存儲器:EEPROMs - 串行 存儲器類型:EEPROM 存儲容量:4K (512 x 8) 速度:400kHz 接口:I²C，2 線串口 電源電壓:2.7 V ~ 5.5 V 工作溫度:-40°C ~ 85°C 封裝/外殼:8-SOIC（0.173"，4.40mm 寬） 供應商設備封裝:8-MFP 包裝:帶卷 (TR) |
| NAND512W3A2SE06 | 制造商:Micron Technology Inc 功能描述:NAND - Gel-pak, waffle pack, wafer, diced wafer on film |
| NAND512W3A2SN6E | 功能描述:IC FLASH 512MBIT 48TSOP RoHS:是 類別:集成電路 (IC) >> 存儲器 系列:- 標準包裝:1 系列:- 格式 - 存儲器:閃存 存儲器類型:閃存 - NAND 存儲容量:4G（256M x 16） 速度:- 接口:并聯(lián) 電源電壓:2.7 V ~ 3.6 V 工作溫度:0°C ~ 70°C 封裝/外殼:48-TFSOP（0.724"，18.40mm 寬） 供應商設備封裝:48-TSOP I 包裝:Digi-Reel® 其它名稱:557-1461-6 |
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