Memory which maintains it's value through power cycles.

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Frequent and Fast Read and Writing to Non-volatile Memory in run-time, using Xilinx System Generator

I'm designing a video processing algorithm on Xilinx Spartan FPGA Board and and I hope to get my whole design done only in Xilinx System Generator (and MATLAB and Simulink HDL Coder), and I need some ...
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1answer
54 views

STM32F429 / STM32F439 read-while-write from two memory banks. Prevents stalling CPU?

I have been reading up on the STM32F429 flash memory (2MB version). From the STM32F4 reference manual I found out that it has two memory banks and supports read-while-write (RWW), which means it can ...
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1answer
38 views

Flash memory range on STM32F429II

I am reading the STM32F429II data sheet and looking at page 84, which shows the memory mapping. The chip has 2MB of internal flash memory, but the data sheet is general for all STM32F427xx/STM32F429xx ...
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2answers
33 views

Flash Memory Failure Modes - Block Failure

My understanding is that typical flash memory failures, such as those due to erase cycles, occur at the bit level. I have a flash in which entire blocks (actually two blocks) are failing. Is there a ...
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0answers
88 views

AVR program code location

I'm working with an ATmega328P and I wanted to interface with the flash memory writing data to it with the macros provided by avr-libc. This is the memory map for my chip: I don't understand where ...
2
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1answer
103 views

EEPROM Write Limit [duplicate]

Just curious as to why do non volatile memories like EEPROM in an AVR have a write limit ? Also is this limit per location/adress in the memory or on the memory as a whole ?
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2answers
143 views

Easy way to tell if a low power MCU supports external memory?

Please forgive my ignorance, as am very new to this. I am looking to build a custom PCB and have found several low-power modules with internal MCUs. Is there an easy/quick way to determine whether ...
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3answers
119 views

What sort of a ferrite core will I need to make core memory?

I am building a homebrew computer using core memory. What sort of a ferrite core will I need?
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1answer
979 views

Storing settings/data on microcontrollers non-volatile memory (STM32F103)

I want to be able to store values in a non-volatile memory so that the microcontroller can load these settings at start up. These settings might change at run-time and it is important for the systems ...
5
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2answers
321 views

Why must flash memory be written/erased in pages/blocks ?

Title says it all. I'm trying to understand the workings of flash memory technologies, at the transistor level. After quite some research, I got good intuitions about floating-gate transistors, and ...
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1answer
94 views

What is the Global Descriptor Table memory type?

What type of memory type is used for the Global Descriptor Table in an Intel Core 2 CPU? Is it just EEPROM or does the CPU normally use another type of NVRAM?
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2answers
179 views

High capacity flash memory

I'm trying to find a suitable high capacity (4-16GB) memory for an embedded application. Clearly this is going to be some kind of NAND flash memory. I need to be able to write to it at at least ...
2
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2answers
1k views

Differences, uses, and theory of volatile and nonvolatile memory?

I understand the basics of volatile and nonvolatile memory. Volatile memory requires a constant power supply to retain data whereas non-volatile memory does not require a constant power supply to ...
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1answer
364 views

How data 0xFF is stored in Flash memory?

Hi i am using SST25VF032B flash memory. Before writing ,it has to be erased to 0xFF. But my doubt is that how it stores real 0xFF. Will is store 0xFF or some other value?
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7answers
3k views

I2C slave address not acknowledged (sometimes)

I'm trying to communicate with a remotely connected FRAM (FM24C04 from Ramtron) by using I2C. This memory is embedded on a board that can be inserted and removed at any time to/from the system ...
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1answer
328 views

Some general NAND flash questions

I have some questions about nand memories. Do we need to erase whole block to rewrite only one page? If true, what is the algorithm? Cache whole block > edit one page > erase whole block > write ...
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1answer
54 views

NVSRAM - Storage Capacitor Selection

I was reading this document from cypress website on Various storage capacitor options for nvSRAM. In page 2 , under the heading 'key characteristics' (see link below), I came across various values for ...
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1answer
167 views

About leakage current, standby current and current budgeting

Am using ST microelectronics NAND Flash device NAND01GW3A0AN6E. In this datasheet under Dc characteristics table they specified leakage current,standby current,operating current parameters. What is ...
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7answers
648 views

Alternatives to using EEPROM

As I understand it, EEPROM is a part of a computer (in my case, an AVR microcontroller) which stores data, and holds on to it even when the device completely shuts down. It allows data to be written ...
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3answers
1k views

What's the catch with FRAM?

After recently acquiring an MSP430 Launchpad I've been playing with various microcontroller projects. Unfortunately, the MSP430G2553 only has 512 bytes of RAM, so doing anything complex requires ...
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1answer
138 views

How to erase stored data in MRAM memory devices

When searching in Google about MRAM I was only able to find the reading and writing process for MRAM. How does erasing happen in MRAM? Also why there is no need of error correction and checking ...
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3answers
469 views

Serial NOR Flash - Vague

What are the structural differences between Serial NOR Flash and Parallel NOR Flash? If there is a structural difference , then What are the differences between Serial NOR Flash and Serial NAND Flash? ...
5
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2answers
1k views

How to store audio data for AVR project?

I see a lot of projects for AVR-based audio players that use an SD card to store the audio data. In fact, I am currently doing the very same thing on an Arduino and its Wave Shield, which has an SD ...
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2answers
231 views

Flash memory slower than magnetic disk [closed]

If flash memory is slower than magnetic disk, how can SSDs be faster than magnetic HDDs? Flash memory (such as USB thumb drives) is a specific type of EEPROM, used for small portable disk ...
2
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2answers
156 views

Non-Volatile Serial Memory Chip

I need a non-voltile serial memory chip that I can clock random bits(about 500 bits) into one at a time by hand using toggle switch to clock them in . This stored bitstream is then clocked out at 20K ...
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2answers
237 views

What is the exact industry-standard programming protocol used for writing bits to a Flash memory device?

I have come across a Program & Verify technique. But I am unsure if that's how data is written to Flash memories in practice. I need a detailed specific protocol, preferably with the relevant ...
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5answers
525 views

Frequent Write to Non-volatile Memory

I am designing a device that automatically adjusts it's physical position as temperature changes. If the device it shut off or power is disconnected the device needs to remember it's last temperature ...