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

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9
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2answers
329 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 ...
4
votes
1answer
45 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 ...
-1
votes
0answers
53 views

How to check if eeprom is corrupted or not? [closed]

I am writing a program to write some values to the addresses of the eeprom and write automatically write zero to the left addresses but it is not working correctly.... It writes some garbage values. ...
15
votes
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 ...
1
vote
2answers
58 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 ...
2
votes
2answers
58 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 ...
0
votes
0answers
90 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 ...
0
votes
1answer
100 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 ...
1
vote
4answers
102 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 ...
1
vote
2answers
78 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 ...
3
votes
2answers
89 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 ...
3
votes
1answer
69 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 ...
0
votes
0answers
20 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. ...
0
votes
0answers
26 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 ...
0
votes
0answers
41 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 ...
0
votes
0answers
31 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 ...
2
votes
1answer
151 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 ...
0
votes
3answers
72 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 ...
2
votes
2answers
220 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 ...
3
votes
1answer
161 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 ?
0
votes
0answers
55 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 ...
4
votes
1answer
504 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 ...
0
votes
1answer
91 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 ...
0
votes
2answers
162 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 ...
2
votes
4answers
176 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 ...
11
votes
3answers
785 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 ...
0
votes
0answers
86 views

Trying to replace 16-bit data EPROM with a pair of 8-bit data FLASH ROMs

I am actually a mechanical engineer not an electrical engineer, but I have some experience with electrical stuff. I am trying to replace a 4Mbit EPROM model M27C4002 with a pair of 2Mbit FLASH ROMs ...
0
votes
0answers
61 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 ...
1
vote
3answers
183 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 ...
3
votes
2answers
306 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 ...
6
votes
5answers
869 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 ...
1
vote
1answer
224 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 ...
3
votes
2answers
170 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 ...
0
votes
0answers
181 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 ...
0
votes
1answer
695 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
votes
1answer
110 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 ...
1
vote
1answer
237 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
votes
3answers
158 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
votes
1answer
143 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 ?
1
vote
1answer
887 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
votes
1answer
198 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 ...
0
votes
1answer
452 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 ...
0
votes
1answer
161 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? ...
1
vote
2answers
154 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. ...
0
votes
0answers
65 views

Is EEPROM read-speed or capacity being held back by the “EEP” qualification?

EEPROMs, the commonplace modern example being NAND Flash memory, seem to be pretty great as a data storage medium. They're pretty fast, pretty capacious, and best of all, when an EEPROM wears out, it ...
2
votes
1answer
556 views

eeprom data corruption during power failure

I recently found a problem with eeprom of a PIC16F877A which is used to control the speed of a dc motor. The drive is supposed to work on the last set speed even if the power fails. But the problem is ...
4
votes
2answers
503 views

What do memory configurations like “256Kx18” mean?

This is a beginner question here. When choosing memory ICs, one of the options is the memory size/configurations. I understand the size part, but what does the "16Kx9" mean? It seems the same memory ...
3
votes
2answers
305 views

Will an SPI EEPROM chip have the same issues with non-atomic write operations as a dsPIC's internal EEPROM? [duplicate]

A while back I had some intermittent trouble with the internal EEPROM of a dsPIC. Every so often, some value in the EEPROM would be found zeroed out on power-on. I tracked the problem down to when the ...
6
votes
4answers
644 views

Will an SPI flash memory chip have the same issues with non-atomic write operations as a dsPIC's internal EEPROM?

A while back I had some intermittent trouble with the internal EEPROM of a dsPIC. Every so often, some value in the EEPROM would be found zeroed out on power-on. I tracked the problem down to when the ...
2
votes
2answers
270 views

usb drive EEPROM IC how is memory read-only blocked and unblocked?

I notice ofteen free give-away usb thumb drive come with a certain memory space locked and unwritable so that a 4 GB flash drive for instance has 1GB of advert which cannot be format. Given that thumb ...