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

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EEProm losing Data due to solder iron

I was working on a product which uses 24c04 EEProm, and we had frequent problem of the same EEProm part no. losing Calibration data on other products. Now we thought that the problem was reset IC ...
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29 views

beaglebone black i2c - eeprom not detected

In my BBB (arch linux) I cannot find eeprom, it used to be in i2c-1 but for some reason (maybe kernel upgrade to 4.1.4) is not ...
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2answers
88 views

PIC32 and I2C EEPROM interface problems

I am writing code for a PIC32MX250F128B to interface with the Microchip 24LC02B EEPROM with I2C interface. I have followed the datasheet of the EEPROM, the PIC32 and section 24 of the PIC32 family ...
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1answer
67 views

Check content of EEPROM during run-time like Visual Studio

In Visual Studio, when we try to read memory location, we add breakpoints and run step by step to see what is getting read or written to a memory location. Is there a similar way, we can do it in ...
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1answer
52 views

EEPROM 93C66 dummy bit problem?

Could someone please explain the reason why the 93C66 EEPROM outputs a dummy 0 during a read operation? From datasheet: 5.1 Read Data from Memory The Read Data from Memory (READ) ...
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4answers
356 views

Why do most of the non-volatile memories have logical 1 as the default state?

I have used non volatile memory, like EEPROM and FLASH memory, in embedded applications and I have always found that unused memory (EEPROM/FLASH) bit locations are always set to ...
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1answer
94 views
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111 views

Breaking a 16-bit long int to write into eeprom?

I am writing data to eeprom AT24C16 using PIC microcontroller pic18f4520. Every address of this eeprom can hold 8-bits while I am using long int's to store data that are 16-bit in size. How to break ...
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2answers
383 views

Inbuilt flash memory size not enough

I am using TM4C1230C3PMI controller from Texas instrument in one of my project. It has 32KB of internal flash, which is not sufficient for my application. Higher flash sized micro-controller are ...
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1answer
62 views

Number of address in AT24C16 EEPROM or is it duplicate?

I am working on EEPROM AT24C16 for a particular project. According to the datasheet it must have 2048 addresses and I should be able to write 1024 unsigned int into it [ 1 unsigned int per 2 ...
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7answers
2k views

Why is serial EEPROM preferred over parallel EEPROM?

In the wikipedia page for EEPROM: http://en.wikipedia.org/wiki/EEPROM it is given that "Parallel EEPROM devices typically have an 8-bit data bus and an address bus wide enough to cover the complete ...
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2answers
65 views

I2C EEPROM endurance

I am using an AT24C32 I2C EEPROM device as a simple storage unit for recording slow analog voltages. I am writing the data byte-wise, no pages. Every write cycle takes 10ms to complete. The data ...
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2answers
102 views

#define EEMEM __attribute__((section('.eeprom')))

After long time investigation, I could not find proper information about "#define EEMEM attribute((section('.eeprom')))" macro on eeprom.h header file. I want to declare variable exactly at address ...
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159 views

Help identifying this chip (EEPROM?)

I have a circuit board from a Stratasys UPrint SE filament cartridge, and I'm trying to talk to the EEPROM on it. This board is unlike other Stratasys boards that I've seen people hacking with, and ...
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1answer
109 views

Will the PIC18F14K50 perform well as a CNC machine micro-processor?

The data sheet can be found here. I'm trying to select a micro-controller which will eventually run a Wireless 2D Laser Engraver/3D Printer/CNC Machine. I have very little experience in selecting ...
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4answers
166 views

ATmega328p and USB conection to PC

I posted the same question on StackOverflow and I was redirected here. For my project I need to be able to program the eeprom of an Atmega 328p via an USB to PC. I tried to incorporate an USBasp ...
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2answers
86 views

Is the ROM of an MCU NAND FLASH ?

I understand binary code is stored in the ROM area of an MCU. Typically most MCUs have FLASH EEPROMS. Is this really the NAND type FLASH storage we find in most SSDs? If not, what are the ...
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2answers
150 views

Flash and EEPROM

Atmega16 datasheet says that it has a) 16 Kbytes of In-System Self-programmable Flash program memory and b) 512 Bytes EEPROM. Can a microcontoller have two separate ROMs which can be programmed ...
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1answer
74 views

Understanding scrolling display circuit

I have this outline of a circuit designed to display a scrolling message. I'm having some trouble understanding how it's supposed to work, so I'm just going to explain what I think I know and go ...
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0answers
23 views

picdem with pickit3 and 24lc16b

I'm trying to program the device using the pickit 3 and the softwaqre pickit3 v3.10 The pickit pins are connect to the following for the chip. ...
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30 views

EEPROM 24LC16B pickit2

I'm having difficulties getting my pickit2 (I have a pickit3 as well but it does the same) to work mplab v8.92 to program the 24lc16b. on the microchip documentation it says it should work but when I ...
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42 views

AT24C04C EEPROM

I'm needing to alter the EEPROM on a AT24C04C I have downloaded MPLabX, However I cannot find the 24C04C on the drop down it ...
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0answers
33 views

How do I store serial to parallel converted data into EEPROM?

I am taking data in serially through a controller on an FPGA with the help of a shift register. I then have to have save this data in parallel form into an EEPROM. -code for serial in parallel out ...
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1answer
257 views

PIC EEPROM after re-programming

I was trying to get my EEPROM read/write working on my PIC. I first programmed a write cycle, and then reprogrammed it to read it out. (To avoid writing every time I start the program/pic) But I ...
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3answers
76 views

EEPROM Microcontroller

It is just a general question. I have designed some micro controller boards with On-Board EEPROM. This EEPROM is to store some configuration parameters for program like calibration data and system ...
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2answers
327 views

EEPROM Write Cycle Time and Write Cycle Endurance

I have an embedded software application that is copying a buffer from RAM to EEPROM. In this case, the EPROM device is a 28C010 (128K x 8). The copying is done at non-regular intervals, generally in ...
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1answer
235 views

EEPROM in beaglebone black

I want to disable EEPROM in beaglebone black by unloading i2c-omap driver. Will it create problem in hardware or any other software support? What should I expect ?
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63 views

Misleading specification on an EEPROM chip?

I'm using a Microchip 24AA02E48 to get a unique MAC address for my FRDM-K64F. Accessing the MAC address is working fine, as well as writing / reading from the EEPROM (well, generally). I haven't ...
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1answer
511 views

Is 3 bytes a min to address a register in a 256K EEPROM?

I am really new to electronics and embeds and I am struggling with some probably basic notions. (I have a software background.) I have an EEPROM (24LC256) connected to an MBED microcontroller and I ...
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1answer
103 views

Issue replacing 27C256 ROM with 62256 RAM

I'm trying to replace a 27c256 ROM with a 62256 RAM, to be able to easily change the memory content. I thought this would be pretty straight forward. Not quite, it seems. I made an simple ...
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2answers
250 views

EEPROM Reading/Writing without Use of Programmer

I am designing a small password based door lock project which is fully made from logic gates and ICs without the use of any sort of programmable devices(it is a simple university project for the Logic ...
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4answers
192 views

EEPROM I2C driver hanged during ESD test?

In our prototype , we have a I2C based EEPROM . During ESD Test(High potential spark is injected into system for a very short moment), the drivers hangs in the I2C code. Basically there are while ...
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3answers
800 views

Why does this EPROM have comb-like structures around the wire bonding pads?

I took some pictures of a Microchip EPROM die from the late 80s / early 90s (I can't recall the exact part number). The wire bonding pads are surrounded by a comb-like structure. What is the purpose ...
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66 views

Serial SPI EEPROM multiplex DI/DO line

Just want to make sure I didn't miss something: according to the data sheet of 25xx010 the DO pin is strictly high-impedance during addressing and writing and only driven when reading. In my ...
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3answers
209 views

When should I write to EEPROM?

I built a simple project using an arduino to control a I2C digital potentiometer being controlled by a remote control via a IR Detector. The purpose is to be able to control the input signal of a ...
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2answers
348 views

PIC16F EEPROM write errors

I'm developing on a PIC16F1936 using the MPLAB X IDE with the XC8 complier. I've been given this project where I need to "upgrade" the software of a PCB such that it can interface with an external ...
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5answers
910 views

EEPROM endurance in energy meter?

I am designing an energy meter for electricity billing purposes by converting an analogue energy meter and counting the number of pulses given by the analogue meter's LED. Since power may be cut off ...
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1answer
252 views

Writing 3 bytes data in EEPROM

In pic18f45k80, the datasheet says one can read and write a byte (8bit) data in EEPROM. I need to write 3 bytes data at once and read it back at once because that 3 bytes data consists of two ...
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2answers
180 views

Casting integer to character

I am using PIC18f microcontroller. I have to write a 16 bit integer variables (2 bytes) which was cast into two character variable i.e to write each byte in a consecutive adrressess of EEPROM. By ...
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203 views

8-Bit data encoding using Hamming code

I am using Pic18f45k80 controller for my project. I am in need of storing 60V lead acid battery's voltage level in internal EEPROM. I am using Hamming code as Error correction algorithm. My data is ...
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1answer
798 views

PIC microcontroller and different EEPROM sizes?

What is the significance of how big the EEPROM is for a microcontroller. I'm trying to select another PIC (first one I chose - PIC16LF1827 - didn't have enough RAM for the application I needed it for) ...
2
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1answer
130 views

27512 pinout and PCB layout

I'm trying to design PCB traces for a 27512 EPROM chip. But its pinout for the higher half of the address bus seems completely illogical to me and I cannot imagine how should I lay out my traces for ...
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1answer
259 views

Arduino EEPROM store multiple data

I just need a small help to completed my project. As my output is printing 2 result but only 1 output is saving to the eeprom. How can I save multiple data into eeprom? I'm just showing the setup and ...
2
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3answers
170 views

Looking for 4 bit memory option

I'm building a small and simple 4-bit CPU and I'm looking for an IC to store the program opcodes. I've considered using eeproms although they seem too large for my purpose, being in the kilobyte ...
2
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1answer
147 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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1answer
1k views

Is there any tool to read/write EEPROM of STM32L from the host?

I'm using STM32L152RTC6 (link to similar MCU line) with a built-in EEPROM (8k). I wonder if there's any tool that allows me to read/write the EEPROM from the host side, other than programming the MCU ...
4
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1answer
211 views

reading EEPROM at startup only versus reading everytime from EEPROM

I have an AVR code where I store data in EEPROM, this data is actually some settings and USER phone numbers. These are quite often accessed. So I planned to read all the values at start-up to memory ...
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1answer
519 views

The difference between storage patterns in RAM or SD cards from EEPROM [closed]

I have used EEPROM to store data in embedded systems. I would like to know about the pattern of RAM and SD cards which were used to store data. Is it that complex in terms of using RAM or SD cards? I ...
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1answer
187 views

Programming an EPROM using 8085 kit

I need to program an EPROM/EEPROM with the code for an 8085. I do not have a programmer. I can't buy one. But I have access to an 8085 kit. Can I use it to program the EPROM/EEPROM via an interface? ...
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2answers
177 views

Play PCM stored in EEPROM without microcontroller

Is it possible to connect digital-to-audio converter with a EEPROM storing PCM data to play that data with a speaker? I am interested in a solution that does not employ any kind of microcontroller. ...