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參數資料
| 型號： | S29AL032D90TFI043 |
| 廠商： | SPANSION LLC |
| 元件分類： | PROM |
| 英文描述： | 32 Megabit CMOS 3.0 Volt-only Flash Memory |
| 中文描述： | 2M X 16 FLASH 3V PROM, 90 ns, PDSO48 |
| 封裝： | LEAD FREE, MO-142DD, TSOP-48 |
| 文件頁數： | 21/67頁 |
| 文件大?。?/td> | 1708K |
| 代理商： | S29AL032D90TFI043 |
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S29AL032D
S29AL032D_00_A8 November 2, 2006
Da ta
Sh e e t
7.13
Write Protect (WP#) — Models 03, 04 Only
The Write Protect function provides a hardware method of protecting certain boot sectors without using VID.
This function is one of two provided by the WP#/ACC pin.
If the system asserts VIL on the WP#/ACC pin, the device disables program and erase functions in the two
outermost 8-Kbyte boot sectors independently of whether those sectors were protected or unprotected using
the method described in Sector Protection/Unprotection on page 21. The two outermost 8-Kbyte boot
sectors are the two sectors containing the lowest addresses in a bottom-boot-configured device, or the two
sectors containing the highest addresses in a top-boot-configured device.
If the system asserts VIH on the WP#/ACC pin, the device reverts to whether the two outermost 8-KByte boot
sectors were last set to be protected or unprotected. That is, sector protection or unprotection for these two
sectors depends on whether they were last protected or unprotected using the method described in Sector
Note that the WP#/ACC pin must not be left floating or unconnected; inconsistent behavior of the device may
result.
7.14
Temporary Sector Unprotect
This feature allows temporary unprotection of previously protected sectors to change data in-system. The
Sector Unprotect mode is activated by setting the RESET# pin to VID. During this mode, formerly protected
sectors can be programmed or erased by selecting the sector addresses. Once VID is removed from the
RESET# pin, all the previously protected sectors are protected again. shows the algorithm, and Figure 17.11
on page 56 shows the timing diagrams, for this feature.
Figure 7.2 Temporary Sector Unprotect Operation
Notes
1. All protected sectors unprotected.
2. All previously protected sectors are protected once again.
8.
Secured Silicon Sector Flash Memory Region
The Secured Silicon Sector feature provides a 256-byte Flash memory region that enables permanent part
identification through an Electronic Serial Number (ESN). The Secured Silicon Sector uses a Secured Silicon
Sector Indicator Bit (DQ7) to indicate whether or not the Secured Silicon Sector is locked when shipped from
the factory. This bit is permanently set at the factory and cannot be changed, which prevents cloning of a
factory-locked part. This ensures the security of the ESN once the product is shipped to the field.
START
Perform Erase or
Program Operations
RESET# = VIH
Temporary Sector
Unprotect Completed
RESET# = VID
(Note 1)
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相關代理商/技術參數 |
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| S29AS008J70BFI030 | 功能描述:閃存 8Mb 3V 70ns Parallel NOR 閃存 RoHS:否 制造商:ON Semiconductor 數據總線寬度:1 bit 存儲類型:Flash 存儲容量:2 MB 結構:256 K x 8 定時類型: 接口類型:SPI 訪問時間: 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 安裝風格:SMD/SMT 封裝 / 箱體: 封裝:Reel |
| S29AS008J70BFI032 | 制造商:Spansion 功能描述:8 MEG CMOS 1.8 VOLT-ONLY BOOT SECTOR FLASH MEMORY - Trays |
| S29AS008J70BFI042 | 制造商:Spansion 功能描述:8 MEG CMOS 1.8 VOLT-ONLY BOOT SECTOR FLASH MEMORY - Trays |
| S29AS008J70TFI030 | 功能描述:閃存 8Mb 1.8V 70ns Parallel NOR 閃存 RoHS:否 制造商:ON Semiconductor 數據總線寬度:1 bit 存儲類型:Flash 存儲容量:2 MB 結構:256 K x 8 定時類型: 接口類型:SPI 訪問時間: 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 安裝風格:SMD/SMT 封裝 / 箱體: 封裝:Reel |
| S29AS008J70TFI040 | 功能描述:閃存 8Mb 1.8V 70ns Parallel NOR 閃存 RoHS:否 制造商:ON Semiconductor 數據總線寬度:1 bit 存儲類型:Flash 存儲容量:2 MB 結構:256 K x 8 定時類型: 接口類型:SPI 訪問時間: 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 安裝風格:SMD/SMT 封裝 / 箱體: 封裝:Reel |
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