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参数资料
| 型号： | PM25LV010-25QC |
| 厂商： | PMC-Sierra, Inc. |
| 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： | 9/24页 |
| 文件大小： | 108K |
| 代理商： | PM25LV010-25QC |
9
Programmable Microelectronics Corp.
Issue Date: December, 2003, Rev: 1.3
PMC
Pm25LV512/010
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Table 6.
WPEN Operation
The WRSR instruction also allows the user to enable or disable the Write Protect (WP#) pin through the use of the
Write Protect Enable (WPEN) bit. Hardware write protection is enabled when the WP# pin is low and the WPEN bit
is "1". Hardware write protection is disabled when either the WP# pin is high or the WPEN bit is "0." When the
device is hardware write protected, writes to the Status Register, including the Block Protect bits and the WPEN
bit, and the locked-out blocks in the memory array are disabled. Write is only allowed to blocks of the memory
which are not locked out. The WRSR instruction is self-timed to automatically erase and program BP0, BP1, and
WPEN bits. In order to write the status register, the device must first be write enabled via the WREN instruction.
Then, the instruction and data for the three bits are entered. During the internal write cycle, all instructions will be
ignored except RDSR instructions. The Pm25LV512/010 will automatically return to write disable state at the
completion of the WRSR cycle.
Note: When the WPEN bit is hardware write protected, it cannot be changed back to "0", as long as the WP# pin
is held low.
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Table 5.
Block Write Protect Bits
相关PDF资料 |
PDF描述 |
|---|---|
| PM25LV010-25QCE | 4 Mbit Uniform Sector, Serial Flash Memory |
| PM25LV010-25SC | 4 Mbit Uniform Sector, Serial Flash Memory |
| PM25LV010-25SCE | 4 Mbit Uniform Sector, Serial Flash Memory |
| PM25LV512-25QC | 4 Mbit Uniform Sector, Serial Flash Memory |
| PM25LV512-25QCE | 4 Mbit Uniform Sector, Serial Flash Memory |
相关代理商/技术参数 |
参数描述 |
|---|---|
| PM25LV010-25QCE | 制造商:PMC 制造商全称:PMC 功能描述:512 Kbit / 1 Mbit 3.0 Volt-only, Serial Flash Memory With 25 MHz SPI Bus Interface |
| PM25LV010-25SC | 制造商:PMC 制造商全称:PMC 功能描述:512 Kbit / 1 Mbit 3.0 Volt-only, Serial Flash Memory With 25 MHz SPI Bus Interface |
| PM25LV010-25SCE | 制造商:PMC 制造商全称:PMC 功能描述:512 Kbit / 1 Mbit 3.0 Volt-only, Serial Flash Memory With 25 MHz SPI Bus Interface |
| PM25LV512 | 制造商:PMC 制造商全称:PMC 功能描述:512 Kbit / 1 Mbit 3.0 Volt-only, Serial Flash Memory With 25 MHz SPI Bus Interface |
| PM25LV512-25QC | 制造商:PMC 制造商全称:PMC 功能描述:512 Kbit / 1 Mbit 3.0 Volt-only, Serial Flash Memory With 25 MHz SPI Bus Interface |
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