Questions tagged [write-protect]

State that prevents the writing to a memory

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Can I use WP(Write Protect) pin of a USB flash memory controller to prevent tampering with its firmware/stored data?

I want to have an USB stick that I can make it read-only and insert it in any untrusted PC without risking a silent BadUSB infection. I was thinking about finding an USB stick that has this WP pin in ...
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How to modify an SD card so it will be read only?

I checked SD card pins and their descriptions and saw that there is a "data input" and a "data out". If I covered, removed the data in pin, would it block all the writing requests to the card?
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3k views

How to Hardware Write Protect Flash SPI, Setting WP# pin signal low stage [Asus P5Q Pro + MX25L8005 SPI]

As a pen testing & security experiment and feature I want to enable write protect on my SPI Flash MX25L8005 module on my motherboard to protect the SMM modules, AML, ACPI and other areas of the ...
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Removing pins/wires on cables (IDE)

Can i physically remove the pin/wire 23 (DIOW --> Write Strobe) for an "IDE read only cable/effect"? I heard that some hardware write blockers cutting physically the write line, but i have no ...
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0answers
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Problem with writing eeprom memory

I am trying to write atmel at28c256 on breadboard so I tied all address lines to ground, and all I/O lines also tied to ground. I untie I/O lines for reading, tie 'WE to high, 'CE to low, and 'OE to ...
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1answer
2k views

When to re-enable WP pin on EEPROM?

I am using STM32F4 microcontroller and 24AA512 EEPROM, which uses I2C to communicate with MCU. Like many EEPROMs it has W(rite) P(rotection) pin and I want to use it because why not. But there is one ...
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1answer
641 views

Is there any way to programmatically reset the BWP bit on a PIC32

We have a product using the PIC32MX795F512L out in the field that has firmware in both the boot and program sections. The boot flash is write protected using the BWP bit 24 = 0 in DEVCFG0. The ...