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

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EEPROM in Simulator for Microchip Pic18f

When programming a Microcontroller from Microchip using Pic18F and using XC8 Compiler, can i use Simulator to test / verify it ? ...
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7answers
444 views

EEPROM is a “Read Only Memory,” so why can I write to it?

Electrically Erasable Programmable Read-Only Memory (EEPROM): If it's using Read-Only Memory (ROM) then how am I able to write to it?
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0answers
16 views

EEPROM for PXIe card [closed]

I am working with an home made PXIe card. The PXie controller is a PEX8311. The EEPROM used to save name and configuration registers is a 93C66. I need more user space to save calibration data and ...
3
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1answer
130 views

SPI data storage devices: (micro)SD card, DataFlash, or serial EEPROM?

I am revisiting some of my design habits, and one of them is under serious scrutiny: the go-to SPI-based storage device is (micro)SD cards, for their price-to-capacity ratio and generally higher ...
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5answers
128 views

Undeletable EEPROM or other storage for micocontrollers?

Is there such thing as permanent EEPROM storage? The data written should be un-deletable. Once written it should be there as long as the chip is not destroyed or damaged. Any other alternatives to ...
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2answers
93 views

USB, UART, SPI difference and usage? [closed]

I am trying to enabling an embedded system built around Intel D1000 MCU. I am mainly from a software background and just starting to catch up with some hardware knowledge. I am trying to build ...
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1answer
49 views

DS2431+ EEPROM Toner cartridge Information

I have an Toner Cartridge with EEPROM of model DS2431. I am able to read the bit data from the eeprom using Arduino OneWire library. I am also able to write to the eeprom. But when I write to it I ...
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0answers
48 views

EEPROM vs NOR Flash [duplicate]

I came to know that EEPROM of these days are nothing but NOR Flash. How true is this statement? In case if it is true, why is still there a distinction between flash and EEPROM when we talk of memory ...
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2answers
138 views

Do different address spaces exist for RAM and ROM in a typical microcontroller? [closed]

If a microcontroller has 16 bit address space from 0000H to FFFFH, will the RAM, I/O registers, memory mapped I/O and ROM(Flash/EEPROM) share the same address space linearly, or will there be a ...
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1answer
75 views

How does information gets stored into EEPROM?

How does information gets physically written to an Arduino Uno EEPROM ? Is each bit of information in fact a small condensator which fills and retains its charge even when the Arduino is powered down ?...
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1answer
113 views

What are situations to use an actual EEPROM over using emulated EEPROM in flash?

I am using stm32 which offers EEPROM emulation on its flash. http://www.st.com/content/ccc/resource/technical/document/application_note/2e/d4/65/6b/87/dd/40/25/DM00049914.pdf/files/DM00049914.pdf/jcr:...
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1answer
67 views

Atmel SPI Serial EEPROM Writing Error - Page Write?

I'm using this EEPROM: Atmel AT25640B SPI EEPROM DATASHEET It seems pretty straight forward to operate and I've followed the datasheet closely when coding my driver. I seemed to have some success ...
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1answer
59 views

DIL IC for simple non-volatile memory [closed]

Can anyone suggest a DIL IC where I can store a couple bits of memory without having to use a complicated interface like serial, I2C, and etc. I want to be able to store at least 2 bits of memory to ...
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2answers
72 views

FreeDSP (ADAU1701) isn't working - what is the issue?

I had FreeDSP PCB soldered recently and for the last two days I've been struggling to make it work. FreeDSP basically consists of ADAU1701 DSP, 24LC256 EEPROM, 12 MHz oscillator, IO circuits and ...
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1answer
72 views

Microcontroller reset

I am facing a problem of micro controller reset, I am thinking of implementing the following to find the function in which it happens, then the root cause. As soon as I enter a function I will ...
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2answers
115 views

EEPROM reading and writing

It is known that there are limited read and write cycles for EEPROM. Suppose I keep writing some important information in EEPROM and read it after power off to ON. Suppose at some point of time the ...
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3answers
70 views

What is the difference between a Micro-controller and a EEPROM? [closed]

What are the tasks Micro-controller are used in, compared to EEPROM? Also for a simple Arudino, is ATmega328 the micro-controller or EEPROM?
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1answer
103 views

How to connect multiple AT28C256/AT93C256/AT24C256/24LC512 EEPROMS to have more space

I want to have more memory say 1 Mega Byte, But I don't know how to connect multiple EEPROMS either in series or parallel I would like to use either AT28.... or AT93.... or AT24.... series Also ...
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4answers
74 views

Best value to overwrite old to tell if memory is not used on eeprom

I have an EEPROM I want to store CRC32 hashes on between 0x0000 and 0x008C. In this range I need a way that I can erase one of the hashes and overwrite its bytes to a default number. By doing this I ...
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1answer
200 views

What is needed to store readable/writable data to flash/eeprom [closed]

I am wanting to add some readable/writeable memory to my ATmega8/attiny project where I can store data, recall the stored data, then overwrite the stored data. The stored data must be able to be ...
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1answer
120 views

PIC C program flow problem XC8

Problem: My C code is not running to the end. To test my EEPROM read and write, I decided to write a simple array and read it back to different array using a PIC. However the problem is not the ...
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0answers
164 views

Why is so8 test clip causing read errors with 93C56 eeprom (TL866 programmer)?

I am trying to read an Atmel 93C56B eeprom, so8 surface mount package, with this programmer. When using the so8 adapter in the zif socket it works perfectly. However when I use the test clip, it is ...
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1answer
97 views

How are system configuration flash or eeprom chips programmed?

I've seen, quite often actually, a circuit that will have an eeprom or flash chip soldered next to the application chip. Take a look at the ESP8266, it has some kind of programmable memory that sets ...
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2answers
166 views

Reading image, sound, binary file from nonvolatile memory for FPGA

For applications that require design on FPGA which shall make use of several image files, sound files or other forms of files, can they be simply included in the FPGA design configuration file? In any ...
3
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3answers
125 views

Can probing an EEPROM with a multimeter corrupt the data?

Say there's an EEPROM on a board and you happen to try probing the pin one by one with a multimeter, is there a good chance that the sequence of probing the pins must have overwritten (thus corrupt) ...
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1answer
81 views

What is the purpose of SRAM in the DS1307 RTC chip and the onboard AT24C32N EEPROM chip??

I am going to interface a RTC to PIC18F and before doing so, I'd like to clear some doubts regarding the module and its connections. I am using the "Tiny RTC" as shown in this link!. The following ...
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1answer
130 views

Why there are AC timing characteristics but not DC in I2C interfaced chip?

I'm quite newbie in electronics, and I'd like to learn why there are AC timing characteristics to this particular EEPROM (24LC512) that I'm using but none for DC? Does AC timing constraints apply to ...
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1answer
114 views

Primary diff between EEPROM and Flash mem, in terms of code memory

In terms of storing program commands, what is the definable difference between EEPROM and Flash memory? Also, in this particular context - For a personal project developing audio codec using TI ...
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1answer
57 views

ATmega48PA power consumption during EEPROM write

PLEASE, PLEASE! My question is about power consumption of the CPU during EEPROM write NOT about the power supply! PLEASE! Thank you! I have a device (ATmega48PA) powered through a 150k resistor ...
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2answers
161 views

Is it possible to generate a functional EEPROM (with persistence) inside an FPGA/CPLD

I'm looking to implement a small persistent 'configuration space' parallel EEPROM within a design. However, given the volatile nature of FPGAs, this doesn't seem possible without some very clever ...
3
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1answer
81 views

How easy to indentify memory like ROM or EEPROM Flash Memory Areas of a Chip

Can anyone tell me would the memory circuit areas (ROM, EEPROM, SDRAM, Flash Memory) of the layers of a die belonging to a MCU and SoC IC's be relatively easy to identify compared to identify circuit ...
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2answers
96 views

Why fram instead of eeprom

Why do all the gameboy cartridge mods for nonvolatile save use a type of ram like fram? Why isn't a sufficiently fast eeprom or flash ic used? EDIT: We all know this is about parallel interface ICs, ...
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1answer
160 views

disable write protection in eeprom

I'm working on pic24fj128ga202 microcontroller. My pic is interfaced with eeprom via I2C. I can't write and read on eeprom(BR24G256), then I read the datasheet of eeprom and came to know that there is ...
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0answers
204 views

Unknown SOT-23-5 I2C device

I have a small board that stores some static and dynamic data: cc 80bytes of serial number, manufacturing date and a counter. The board has two SOT-23-5 components: one is with CBOCX and one is with ...
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2answers
129 views

EEPROM writes/reads wrong bytes

I am using M95512-W M95512-RM95512-DF eeprom for storing my data. But sometimes it's not storing bytes I want. Instead of it, it's storing successive (wrong)bytes. ...
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3answers
221 views

Why use RAM IC over EEPROM IC?

I have been looking at various different external storage ICs that would work with an arduino. When I looked at the specs of some EEPROM chips and compared it to the specs of other RAM chips, I ...
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0answers
153 views

Problem in I2C writing operation

Im trying to write a letter('A') in A EEPROM via I2C using PIC24FJ64GA002 microcontroller. Im connecting only one eeprom(24c256) to my PIC, and its slave address is "0xA0". I've done according to the ...
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1answer
111 views

How to find which one is master/slave? - PIC

Im using PIC24FJ64GA002 microcontroller interfacing with EEPROM(24C256). EEPROM's SDA and SCL pins are connected with respective PIC24F I2C1's SDA and SCL. All other pins of eeprom are grounded. Here ...
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0answers
71 views

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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2answers
629 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
125 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
154 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) ...
6
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4answers
536 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
210 views
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3answers
457 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
539 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
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1answer
174 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 addresses]...
16
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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
103 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
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2answers
414 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 ...