Questions tagged [eeprom]

Acronym: Electrically Erasable, Programmable Read-Only Memory. Sometimes used with Flash parts that are similar to old EEPROM parts.

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EEPROM page size

I have an M24C01-x EEPROM (1 KBit in size) driven by an STM32. The datasheet doesn't make it clear what the page size of that EEPROM is. I require it to properly configure the STM32 EEPROM driver. ...
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how to use TMP87P809N microcontroller with any EEPROM

How to use TMP87P809N with any EEPROM so that I can save timer counting of CMOS RAM in EEPROM for backup, I want to save that counting if electricity get failed and restart.
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What are some typical low cost microcontrollers and chips that are used in electronic toys?

I'm researching microcontrollers, memory chips, and sound chips for simple electronic toys. These toys might take user input via buttons or switches, and then play back sounds stored on a memory chip ...
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Interfacing PIC18F4550 with I²C EEPROM (24AA1025)

I am working on a university project in which I need to interface a PIC18F4550 with an I²C EEPROM. I read many codes and saw many projects on this topic. And I wrote a sample code from MPLAB C18 (and ...
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What's a good EEPROM replacement for a 27C256/29C256? [closed]

I teach a hands-on computer architecture course in which the students burn their programs onto an EPROM with a commerical PROM burner. The instructions are read by a low-speed TTL computer they build....
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How to communicate with parallel eeprom with pic18f?

How to read eeprom M27C64A with pic18f4520, should i enable and disable the chip enable as well as output enable inside the loop while increasing the address? Can someone suggest me some code or ...
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100k EEPROM writes “per bit” or as a whole?

As I understand it, the life of an EEPROMs is usually rated at a certain number (e.g. 100k) of writes. Is this "per byte" or writes to the EEPROM system as a whole? E.g. If the EEPROM has 4k bytes, ...
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Storing data to NVRAM

I'm designing an 8 bit computer, and one of the tricky parts is streamlining the loading of the small "OS" (read collection of routines) into the 32kB NVRAM that I will use instead of an EPROM. I was ...
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Changing the standard “message” on PIC24F shown on Android

I am working on an android accessory development. Currently whenever I plugin my Android device to the PIC24F (which I had programmed in the PIC24F) but I haven't installed in the Android phone It ...
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Reading empty (new) AT24C16 I2C EEPROM - 0xFF or 0x00?

What byte vaule should I see when reading empty EEPROM chip via I2C?
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How to program EEPROM

In looking for a 64K x 8 Parallel EEPROM, one of the most available chips is the 27SF512. Google would indicate this is commonly used by auto enthusiasts to replace chips in various cars. I have found ...
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How is this EEPROM fully addressable?

I am looking at the datasheet for this 64k EEPROM, and I am having trouble understanding how to use it. I would like to do a lookup from a 16-bit address to an 8-bit data word. The chip only has 13 ...
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Flash/EEPROM endurance

In this answer stevenvh suggests that Flash memory uses the same floating-gate technology as EEPROM. However! Looking at a random AVR datasheet it says for EEPROM 100 000 erase/write cycles, while for ...
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High capacity - EEPROM chip

I am looking for high capacity eeprom(I2C compatible) IC as an alternative to 1gb or 2gb micro SD card (data storage segment in my project) just in case I fail to interface Sdcard with pic32 mcu.. ...
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How do I read I2C memory with an Arduino?

I have HH100D humidity sensor. It outputs a frequency signal, which I know how to handle. However, it also has a small EEPROM with calibration values that is available via I2C. Those values are ...
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Advice on suitable SRAM

I'm kind of new to all this and the choices out there is kind of overwhelming when it comes to selecting a SRAM package and Flash eprom to go with a 10 Mhz Z80180. I'm looking for a 128 KB SRAM and a ...
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Will reading EE/E/PROM wear it out?

After reading some answers on SuperUser, I started thinking: Can EE/E/PROM be damaged by only reading it, with no writing at all? I've read several datasheets for EEPROMS and products that contain ...
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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 ...
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What's the difference between 24AA1025, 24FC1025 and 24LC1025

24AA1025: operates from 1.7V - 5.5V, 400kHz, $2.37 24FC1025: operates from 2.5V - 5.5V, 1 MHz, $2.37 24LC1025: operates from 2.5V - 5.5V, 400kHz, $2.37 See here. 24AA1025 is unique, because of the ...
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Failure mode of FLASH memory

What is the failure mode of flash memory? I've got some chips rated for 10,000 cycles - what happens after 10k cycles? Do the chips stop writing properly, do you get read errors, etc.? Does it also ...
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750 views

Intermittent SPI bus

I'm attempting to interface a PIC18F4520 to a 25LC640 via SPI protocol. I'm using the built in MSSP hardware of the PIC. The PIC18F4520 is the only master on the bus. I'm reading 16 bytes of data from ...
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Memory suggestions for MSP430

I'm developing a measurement application with the TI MSP430 and I would like to hear some suggestions on what type of memory I can use. The idea is to use it for logging during a certain time and ...
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Serial EEPROM with FAT

Is it possible to format an SPI EEPROM (such as AT24C128) to be used as an SD card? So format it with FAT 32 and have a 16MB drive appear in windows? Thanks