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

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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
53 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
60 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
77 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
42 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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0answers
57 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
56 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
43 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
101 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 ...
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1answer
54 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
76 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
76 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
97 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
65 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
127 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
122 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
68 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
63 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
263 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
93 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
116 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
413 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
127 views
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3answers
294 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
435 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
104 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
76 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
271 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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1answer
377 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
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1answer
135 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
243 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
142 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
672 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
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1answer
85 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 ...
2
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1answer
515 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
89 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 ...
3
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2answers
533 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
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1answer
466 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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1answer
538 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
139 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
485 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
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4answers
259 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
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3answers
829 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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3answers
286 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
474 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
1k 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
342 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
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2answers
199 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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1answer
941 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) ...