State that prevents the writing to a memory
When configured with writing protection mechanism, the writing to a certain memory piece isn't allowed. This protection could be physical or logical.
Questions tagged [write-protect]
12 questions
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votes
1 answer
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 BIOS that could potentially be overwritten or modified…
Tyler
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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 firmware is not Code Protected (CP bit 28 in DEVFG0). …
tcrosley
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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 low for reading. I am reading all ones at I/O…
Novacic
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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 problem I can think of:
In documentation it says…
Terraviper-5
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Needing some EPROM breadboard help!
I'm currently trying to make an EPROM programmer on my breadboard capable of programming a single address at a time. Nothing fancy for writing large programs, just trying to learn some basics.
Right now, I am stuck without a button to trigger a RC…
Andrew Albritton
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vote
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STM32F103C8T6 Bluepill - core held in reset error
"Core is held in reset" - the error stm32 st-link utility tool throws when I try to erase my STM32F1 blue chip. Is my board damaged or something? In Settings Window - Under STM32 Target Information, Target and Target Voltage detection appears to be…
user8737703
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how to determine what chip wire allows BIOS flashing?
how to determine what chip wire/leg allows BIOS flashing?
I want to modify my MOBO to deny BIOS flashing.
I only want it allowed when I really need to write on it.
So, I need to know:
if it is possible to determine what wire I need to cut to deny…
VeganEye
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Macronix MX25U12832F SPI flash write protection
I am having trouble understanding the Macronix MX25U12832F's datasheet. It has write protection features, but I am looking for support for a WP mode that, once enabled, lasts until the power is cycled or the chip is reset. Winbond SPI flash chips…
Melab
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Nucleo F401RE stuck in write protect
I have a Nucleo F401RE board which seems to be stuck in write protect mode 1. I have tried using STM32CubeProgrammer as well as ST link utility to try and set it to mode 0, but it fails with a generic error saying that it is unable to program the…
Victor
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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 its controller and DIY mod an external switch to…
learner
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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?
heathcliff
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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 information if there is also a software part. My mind…
karts
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