參數(shù)資料
型號： M25PE40
廠商： 意法半導(dǎo)體
元件分類： DRAM
英文描述： 4 Mbit Uniform Sector, Serial Flash Memory
中文描述： 4兆位統(tǒng)一部門，串行閃存
文件頁數(shù)： 15/60頁
文件大?。?/td> 315K
代理商： M25PE40
M25PE40
Operating features
15/60
4.8.2
Specific Hardware and Software protections
The features a Hardware Protected mode, HPM, and two Software Protected modes,
SPM1 and SPM2, that can be combined to protect the memory array as required. They are
described below:
HPM
●
HPM in T7X process (see
Important note on page 6
)
:
The Hardware Protected mode (HPM) is entered when Top Sector Lock (TSL) is driven
Low, causing the top 256 pages of memory to become read-only. When Top Sector
Lock (TSL) is driven High, the top 256 pages of memory behave like the other pages of
memory and the protection depends on the Block Protect bits (see SPM2 below).
HPM in T9HX process (see
Important note on page 6
)
:
The Hardware Protected mode (HPM) is used to write-protect the non-volatile bits of
the Status Register (that is, the Block Protect bits, BP2, BP1 and BP0, and the Status
Register Write Disable bit, SRWD).
HPM is entered by driving the Write Protect (W) signal Low with the SRWD bit set to
High. This additional protection allows the Status Register to be hardware-protected.
(see also
Section 6.4.4: SRWD bit
)
●
SPM1 and SPM2
●
The first Software Protected mode (SPM1) is managed by specific Lock Registers
assigned to each 64-Kbyte sector.
The Lock Registers can be read and written using the Read Lock Register (RDLR) and
Write to Lock Register (WRLR) instructions.
In each Lock Register two bits control the protection of each sector: the Write Lock Bit
and the Lock Down Bit.
–
Write Lock Bit:
The Write Lock Bit determines whether the contents of the sector can be modified
(using the Write, Program or Erase instructions). When the Write Lock Bit is set,
‘1’, the sector is write protected – any operations that attempt to change the data
in the sector will fail. When the Write Lock Bit is reset to ‘0’, the sector is not write
protected by the Lock Register, and may be modified.
–
Lock Down Bit:
The Lock Down Bit provides a mechanism for protecting software data from simple
hacking and malicious attack. When the Lock Down Bit is set, ‘1’, further
modification to the Write Lock and Lock Down Bits cannot be performed. A reset,
or power-up, is required before changes to these bits can be made. When the
Lock Down Bit is reset, ‘0’, the Write Lock and Lock Down Bits can be changed.
The Write Lock Bit and the Lock Down Bit are volatile and their value is reset to ‘0’ after
a Power-Down or a Reset.
相關(guān)PDF資料
PDF描述
M25PE40VMN6G 4 Mbit Uniform Sector, Serial Flash Memory
M25PE40VMN6P 4 Mbit Uniform Sector, Serial Flash Memory
M25PE40VMN6TG 4 Mbit Uniform Sector, Serial Flash Memory
M25PE40VMN6TP 4 Mbit Uniform Sector, Serial Flash Memory
M25PE40VMP6G 1A Standard Fixed Output LDO Regulators with Shutdown Switch; Package: TO220FP-5; Constitution materials list: Packing style: Tube packaging; Package quantity: 50; Minimum package quantity: 500;
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
M25PE40S-VMW6G 制造商:Micron Technology Inc 功能描述:SERIAL NOR - Trays 制造商:Micron Technology Inc 功能描述:IC FLASH 4MBIT 75MHZ 8SO
M25PE40S-VMW6TG 制造商:Micron Technology Inc 功能描述: 制造商:Micron Technology Inc 功能描述:SERIAL NOR - Tape and Reel
M25PE40S-VMW6TG TR 制造商:Micron Technology Inc 功能描述:IC FLASH 4MBIT 75MHZ 8SO
M25PE40-VMC6G 功能描述:IC SRL FLSH 4MB 75MHZ 8MLP RoHS:是 類別:集成電路 (IC) >> 存儲器 系列:Forté™ 標(biāo)準(zhǔn)包裝:2,000 系列:- 格式 - 存儲器:RAM 存儲器類型:SRAM - 異步 存儲容量:256K (32K x 8) 速度:15ns 接口:并聯(lián) 電源電壓:3 V ~ 3.6 V 工作溫度:-40°C ~ 85°C 封裝/外殼:28-TSSOP（0.465"，11.8mm 寬） 供應(yīng)商設(shè)備封裝:28-TSOP 包裝:帶卷 (TR) 其它名稱:71V256SA15PZGI8
M25PE40-VMC6TG 制造商:Micron Technology Inc 功能描述:SERIAL NOR - Tape and Reel
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