參數(shù)資料
型號(hào)： NAND08GW4B3BN6T
廠商： STMICROELECTRONICS
元件分類： PROM
英文描述： 512M X 16 FLASH 3V PROM, 35 ns, PDSO48
封裝： 12 X 20 MM, PLASTIC, TSOP-48
文件頁(yè)數(shù)： 27/59頁(yè)
文件大?。?/td> 998K
代理商： NAND08GW4B3BN6T
33/59
NAND512-B, NAND01G-B, NAND02G-B, NAND04G-B, NAND08G-B
DATA PROTECTION
The device has both hardware and software fea-
tures to protect against program and erase opera-
tions.
It features a Write Protect, WP, pin, which can be
used to protect the device against program and
erase operations. It is recommended to keep WP
at VIL during power-up and power-down.
In addition, to protect the memory from any invol-
untary program/erase operations during power-
transitions, the device has an internal voltage de-
tector which disables all functions whenever VCC
is below 1.5V.
The device features a Block Lock mode, which is
enabled by setting the Power-Up Read Enable,
Lock/Unlock Enable, PRL, signal to High.
The Block Lock mode has two levels of software
protection.
■
Blocks Lock/Unlock
■
Blocks Lock-down
Refer to Figure 21. for an overview of the protec-
tion mechanism.
Blocks Lock
All the blocks are locked simultaneously by issuing
a Blocks Lock command (see Table 10.).
All blocks are locked after power-up and when the
Write Protect signal is Low.
Once all the blocks are locked, one sequence of
consecutive blocks can be unlocked by using the
Blocks Unlock command.
forms for details on how to issue the command.
Blocks Unlock
A sequence of consecutive locked blocks can be
unlocked, to allow program or erase operations, by
issuing an Blocks Unlock command (see Table
The Blocks Unlock command consists of four
steps:
■
One bus cycle to setup the command
■
two or three bus cycles to give the Start Block
Address (refer to Table 8. , Table 9. and
■
one bus cycle to confirm the command
■
two or three bus cycles to give the End Block
Address (refer to Table 8. , Table 9.and Figure
The Start Block Address must be nearer the logi-
cal LSB (Least Significant Bit) than End Block Ad-
dress.
If the Start Block Address is the same as the End
Block Address, only one block is unlocked.
Only one consecutive area of blocks can be un-
locked at any one time. It is not possible to unlock
multiple areas.
Figure 19. Blocks Unlock Operation
Note: Three address cycles are required for 2,4 and 8 Gb devices. The 512Mb and 1Gb devices only require two address cycles.
I/O
WP
Start Block Address, 3 cycles
ai08670
23h
Blocks Unlock
Command
Add1
Add2
Add3
24h
Add1
Add2
Add3
End Block Address, 3 cycles
相關(guān)PDF資料
PDF描述
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相關(guān)代理商/技術(shù)參數(shù)
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NAND128W3A0BN6E 功能描述:閃存 2.7-3.6V 128M(16Mx8) 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
NAND128W3A0BN6F 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
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