Questions tagged [flash-memories]
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108 questions
1 vote
1 answer
89 views
Are Intel-Altera EPCS/EPCQ configuration flashes using SPI or a proprietary Active Serial interface?
In the datasheets of Intel-Altera configuration flash devices (EPCS and EPCQ series), the interface is described as Active Serial Interface (AS) rather than SPI. The interface pins (nCS, DCLK, DATA, ...
- 11
0 votes
1 answer
79 views
STM32L4S5 write data to 2MB flash memory (STM32CubeIDE)
I am trying to write to the flash memory of the STM32L4S5QIIX microcontroller on the EVAL-ADIN1110EBZ development board. I have also tried similar code on an STM32L4S5VITX microcontroller on a custom ...
- 21
1 vote
1 answer
89 views
Problem using STM32 FLash memory to store data
I followed tutorial to store data in flash memory of stm32. I have stm32f407 discovery board, I first flashed code to store a string in sector11 of the flash memory (0x080E0000). Then I checked in ...
9 votes
2 answers
3k views
Does unused flash memory degrade faster?
I've seen two different pendrives go bad in the exact same way: they were written up to 30-40% of their capacity, producing no RW errors in that part. I was using both pendrives each few weeks/months ...
- 515
1 vote
1 answer
96 views
Tell SDSC from SDHC (read bit CCS) without re-initializing the SD card
Is there a way to figure out whether an SD card is an SDSC or an SDHC (or superior) without using the ACMD41 command? Essentially I find myself in a place where a card has already been initialized (ie....
- 63
2 votes
1 answer
199 views
Issue after bootloader on STM32F072RBT6: Stack Pointer not jumping to application address
I am currently working on a project using the STM32F072RBT6 microcontroller, where I have implemented a custom bootloader to load an application program into flash memory. However, after the ...
- 21
0 votes
1 answer
78 views
SPI flash memory (AT26DF161A) with PIC16F883 write wrong data in memory and Manufacturer ID is wrong
I'm working on a product with a TFT display and I want to save the screens in a flash memory. I had available an AT26DF161A memory, so I build a prototype in order to test it with a PIC16F883. I wrote ...
2 votes
1 answer
137 views
Increasing voltage from 5 V VCC (i.e. logic HIGH) to 12 V during operation
I'm working with a handful of NOR flash chips that have a write protection mechanism where the memory can't be written to unless the blocks are unprotected. Evidently, unprotecting them requires the ...
- 21
-1 votes
1 answer
575 views
Flash memory corruption possible reasons?
I am working with an external Serial Flash memory (Winbond 25Q80). I could read-erase-write the flash memory using SerialFlash library in arduino environment. But it seems data of flash memory gets ...
3 votes
1 answer
545 views
FAT32 file system corruption on internal flash of ESP32-S3
I am using an ESP32-S3 chip with 8 MB internal flash. Out of which 4 MB is for the FAT32 file system. I read and write files every 30 min into the file system. I am also using the wear leveling ...
- 43
0 votes
0 answers
76 views
Finding memories power dissipation
Can someone tell me how to calculate the power dissipation of digital ICs like NAND Flash, QSPI NOR Flash and microcontrollers?
2 votes
1 answer
81 views
How does MLC FLASH store multiple bits per cell?
How does MLC FLASH store multiple bits per cell? I understand that each cell is one MOSFET, are the different bits represented by multiple voltage levels (as opposed to just high/low, which would then ...
- 179
1 vote
0 answers
81 views
NOR flash address lines
I am wondering if someone can explain how the address lines work on NOR flash. Does each address line map to a physical area in flash? as in A0= 0000-FFFF if this is the case and the NOR has 21 ...
0 votes
0 answers
89 views
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 ...
- 1
0 votes
2 answers
80 views
Is it safe to write data to MAX35103 flash memory
I am using MAX35103 sensor in my project and I want to store some constant data into MAX35103 flash memory using STM32. However, I've read something that it is not safe to write data to the MAX35103 ...
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