參數(shù)資料
型號： W25Q64BVSSIP
廠商： WINBOND ELECTRONICS CORP
元件分類： PROM
英文描述： 8M X 8 SPI BUS SERIAL EEPROM, PDSO8
封裝： 0.208 INCH, GREEN, PLASTIC, SOIC-8
文件頁數(shù)： 4/61頁
文件大?。?/td> 1726K
代理商： W25Q64BVSSIP
W25Q64BV
- 12 -
10.2 WRITE PROTECTION
Applications that use non-volatile memory must take into consideration the possibility of noise and other
adverse system conditions that may compromise data integrity. To address this concern the W25Q64BV
provides several means to protect data from inadvertent writes.
10.2.1 Write Protect Features
Device resets when VCC is below threshold
Time delay write disable after Power-up
Write enable/disable instructions and automatic write disable after program and erase
Software and Hardware (/WP pin) write protection using Status Register
Write Protection using Power-down instruction
Lock Down write protection until next power-up
(1)
One Time Program (OTP) write protection
(1)
Note 1: These features are available upon special order. Please contact Winbond for details.
Upon power-up or at power-down, the W25Q64BV will maintain a reset condition while VCC is below the
threshold value of VWI, (See Power-up Timing and Voltage Levels and Figure 31). While reset, all
operations are disabled and no instructions are recognized. During power-up and after the VCC voltage
exceeds VWI, all program and erase related instructions are further disabled for a time delay of tPUW. This
includes the Write Enable, Page Program, Sector Erase, Block Erase, Chip Erase and the Write Status
Register instructions. Note that the chip select pin (/CS) must track the VCC supply level at power-up until
the VCC-min level and tVSL time delay is reached. If needed a pull-up resister on /CS can be used to
accomplish this.
After power-up the device is automatically placed in a write-disabled state with the Status Register Write
Enable Latch (WEL) set to a 0. A Write Enable instruction must be issued before a Page Program, Sector
Erase, Chip Erase or Write Status Register instruction will be accepted. After completing a program,
erase or write instruction the Write Enable Latch (WEL) is automatically cleared to a write-disabled state
of 0.
Software controlled write protection is facilitated using the Write Status Register instruction and setting
the Status Register Protect (SRP0, SRP1) and Block Protect (SEC,TB, BP2, BP1 and BP0) bits. These
settings allow a portion or all of the memory to be configured as read only. Used in conjunction with the
Write Protect (/WP) pin, changes to the Status Register can be enabled or disabled under hardware
control. See Status Register for further information. Additionally, the Power-down instruction offers an
extra level of write protection as all instructions are ignored except for the Release Power-down
instruction.
相關(guān)PDF資料
PDF描述
W25Q64CVZPAG 64M X 1 SPI BUS SERIAL EEPROM, PDSO8
W25Q64CVZEAG 64M X 1 SPI BUS SERIAL EEPROM, PDSO8
W25Q64CVDAIG 64M X 1 SPI BUS SERIAL EEPROM, PDIP8
W25Q64DWZPIP 256K X 32 SPI BUS SERIAL EEPROM, 7.5 ns, PDSO8
W25Q80BLSNIG 8M X 1 SPI BUS SERIAL EEPROM, PDSO8
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
W25Q64BVZEIG 功能描述:IC SPI FLASH 64MBIT 8WSON RoHS:是 類別:集成電路 (IC) >> 存儲器 系列:SpiFlash® 標(biāo)準(zhǔn)包裝:1,000 系列:- 格式 - 存儲器:EEPROMs - 串行 存儲器類型:EEPROM 存儲容量:4K (512 x 8) 速度:400kHz 接口:I²C，2 線串口 電源電壓:2.7 V ~ 5.5 V 工作溫度:-40°C ~ 85°C 封裝/外殼:8-SOIC（0.173"，4.40mm 寬） 供應(yīng)商設(shè)備封裝:8-MFP 包裝:帶卷 (TR)
W25Q64BVZEIP 制造商:WINBOND 制造商全稱:Winbond 功能描述:64M-BIT SERIAL FLASH MEMORY WITH DUAL AND QUAD SPI
W25Q64CV 制造商:WINBOND 制造商全稱:Winbond 功能描述:3V 64M-BIT SERIAL FLASH MEMORY WITH DUAL AND QUAD SPI
W25Q64CVDAAG 制造商:WINBOND 制造商全稱:Winbond 功能描述:3V 64M-BIT SERIAL FLASH MEMORY WITH DUAL AND QUAD SPI
W25Q64CVDAAP 制造商:WINBOND 制造商全稱:Winbond 功能描述:3V 64M-BIT SERIAL FLASH MEMORY WITH DUAL AND QUAD SPI
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。

采購需求

(若只采購一條型號，填寫一行即可)

發(fā)布成功！您可以繼續(xù)發(fā)布采購。也可以進(jìn)入我的后臺，查看報價

發(fā)布成功！您可以繼續(xù)發(fā)布采購。也可以進(jìn)入我的后臺，查看報價

*型號 *數(shù)量 廠商 批號 封裝
添加更多采購

我的聯(lián)系方式

*
*
*