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参数资料
| 型号： | M25PE20-VMP6TP |
| 厂商： | 意法半导体 |
| 元件分类： | DRAM |
| 英文描述： | 4 Mbit Uniform Sector, Serial Flash Memory |
| 中文描述： | 4兆位统一部门，串行闪存 |
| 文件页数： | 15/60页 |
| 文件大小： | 310K |
| 代理商： | M25PE20-VMP6TP |
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M25PE20, M25PE10
Operating features
15/60
4.8.2
Specific Hardware and Software protections
The M25PE20/M25PE20 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, 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.
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PDF描述 |
|---|---|
| M25PE10-VMN6P | 4 Mbit Uniform Sector, Serial Flash Memory |
| M25PE10-VMP6G | 4 Mbit Uniform Sector, Serial Flash Memory |
| M25PE10-VMP6P | 4 Mbit Uniform Sector, Serial Flash Memory |
| M25PE10-VMP6TG | 4 Mbit Uniform Sector, Serial Flash Memory |
| M25PE10-VMP6TP | 4 Mbit Uniform Sector, Serial Flash Memory |
相关代理商/技术参数 |
参数描述 |
|---|---|
| M25PE20-VMS6G | 制造商:Micron Technology Inc 功能描述: |
| M25PE20-VMW6G | 制造商:Micron Technology Inc 功能描述:SERIAL NOR - Trays |
| M25PE20-VMW6TG | 制造商:Micron Technology Inc 功能描述:SERIAL NOR - Tape and Reel |
| M25PE40 | 制造商:NUMONYX 制造商全称:Numonyx B.V 功能描述:4 Mbit, page-erasable serial Flash memory with byte alterability, 75 MHz SPI bus, standard pinout |
| 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 |
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