參數(shù)資料
型號(hào)： NAND512R4A1AV6
廠商： NUMONYX
元件分類： PROM
英文描述： 32M X 16 FLASH 1.8V PROM, 15000 ns, PDSO48
封裝： 12 X 17 MM, PLASTIC, WSOP-48
文件頁(yè)數(shù)： 24/56頁(yè)
文件大?。?/td> 882K
代理商： NAND512R4A1AV6
NAND128-A, NAND256-A, NAND512-A, NAND01G-A
30/56
Figure 22. Bad Block Management Flowchart
Figure 23. Garbage Collection
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 pro-
gram operations it is recommended to implement
a Garbage Collection algorithm. In a Garbage Col-
lection software the valid pages are copied into a
free area and the block containing the invalid pag-
es is erased (see Figure 23.).
Wear-leveling Algorithm
For write-intensive applications, it is recommend-
ed 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 Al-
gorithm 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:
AI07588C
START
END
NO
YES
NO
Block Address =
Block 0
Data
= FFh?
Last
block?
Increment
Block Address
Update
Bad Block table
Valid
Page
Invalid
Page
Free
Page
(Erased)
Old Area
AI07599B
New Area (After GC)
相關(guān)PDF資料
PDF描述
NAND01GR3A1AN1T 128M X 8 FLASH 1.8V PROM, 15000 ns, PDSO48
NAND01GR3A3AN1T 128M X 8 FLASH 1.8V PROM, 15000 ns, PDSO48
NAND01GR4A3AZB6F 64M X 16 FLASH 1.8V PROM, 15000 ns, PBGA63
NAND01GW4A3AN1T 64M X 16 FLASH 3V PROM, 12000 ns, PDSO48
NAND01GW4A1AZB1E 64M X 16 FLASH 3V PROM, 12000 ns, PBGA63
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
NAND512R4A2CWFD 制造商:Micron Technology Inc 功能描述:NAND - Gel-pak, waffle pack, wafer, diced wafer on film
NAND512R4A2CZA6 制造商:Micron Technology Inc 功能描述:512MB. 3V X8 NO OPTION TSOP48TSOP-1 48 12X20 AL 42 - Trays
NAND512R4A2DDI6 制造商:Micron Technology Inc 功能描述:NAND - Gel-pak, waffle pack, wafer, diced wafer on film
NAND512W3A0AN6 功能描述:閃存 NAND & S.MEDIA FLASH RoHS:否 制造商:ON Semiconductor 數(shù)據(jù)總線寬度:1 bit 存儲(chǔ)類型:Flash 存儲(chǔ)容量:2 MB 結(jié)構(gòu):256 K x 8 定時(shí)類型: 接口類型:SPI 訪問(wèn)時(shí)間: 電源電壓-最大:3.6 V 電源電壓-最小:2.3 V 最大工作電流:15 mA 工作溫度:- 40 C to + 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體: 封裝:Reel
NAND512W3A0AN6E 功能描述:閃存 2.7-3.6V 512M(64Mx8) RoHS:否 制造商:ON Semiconductor 數(shù)據(jù)總線寬度:1 bit 存儲(chǔ)類型:Flash 存儲(chǔ)容量:2 MB 結(jié)構(gòu):256 K x 8 定時(shí)類型: 接口類型:SPI 訪問(wèn)時(shí)間: 電源電壓-最大:3.6 V 電源電壓-最小:2.3 V 最大工作電流:15 mA 工作溫度:- 40 C to + 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體: 封裝:Reel
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