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EEPROM in Comp.Arch.Embedded

Comp.Arch.Embedded is a worldwide Usenet news group that is used to discuss various aspects of Embedded Systems development.

We found 205 threads matching "EEPROM"

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Internal eeprom acces with Atmega16
0

Yannick - 7 years ago
I have a problem with using the internal eeprom of the atmega16. I am using codevision C and in the help file they say to do something like this : //declare global eeprom a=0; then then you can write the eeprom with changing the value for a , the eeprom adress is the adress the compiler h...Internal eeprom acces with Atmega16

Log runtime to EEPROM?
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Bubb - 7 years ago
I want to log the total runtime of an application to an EEPROM. But I must have a secure method to do that if the application get turned of at that moment when I write the data to the EEPROM. The runtime is going to be saved to the EEPROM about every 30 minutes or so. Any suggestio...Log runtime to EEPROM?

How to use the EEPROM on MC9S12XDP512?
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jeasey - 4 years ago
Hi,Everyone, NOW,I use XDP512. I can not use the Internal EEPROM of XDP512 after serveral EEPROM wrting,erasing and reading test. Could anyone give me how to initialize the Internal EEPROM . It is best if procedure,i can learn it. Thinks!! ...How to use the EEPROM on MC9S12XDP512?

Accessing external I2C EEPROM with Cypress EZ-USB dev kit
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galapogos - 6 years ago
Hi, I have the Cypress FX2LP development kit, and according to the manual, I can select either large EEPROM(Microchip 24LC128) for simulation or small EEPROM(Microchip 24LC00) for debugging. Since I'm still in my development stage, I'm debugging the firmware, so I'm choosing small EEPROM. The...Accessing external I2C EEPROM with Cypress EZ-USB dev kit

CRC calculation for variables stored in eeprom
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Started by ssubbarayan 6 years ago
Dear all, I have posted a couple of months back about eeprom corruption and some experts here adviced me to stored a CRC value for the memory contents to determine corruption.Regarding this I have got a query: In our case,the contents in the eeprom change dynamically in run time.Does that ...CRC calculation for variables stored in eeprom

Initializing RTL8019AS in C
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Trespasser - 5 years ago
Hi, I can start a RealTek 8019AS network interface controller IC when it has the 9346 EEPROM attached, but can't get it going without the EEPROM. I know it can be done, though. Anyone have a C code example of how to initialise the 8019AS NIC to start without the serial EEPROM? Regards...Initializing RTL8019AS in C

PIC16F628: what's the addr of EEPROM?
0

Started by Michael 9 years ago
Where in the docs is the starting address of EEPROM defined?? A program I wrote a year or so ago has EEPROM data ORG'd and DEFINED at 0x1200, but I have no idea were I got that address! Having a senior moment, I guess. Michael ...PIC16F628: what's the addr of EEPROM?

AVR (AT90S2313) EEPROM
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Started by Tony Smith 9 years ago
I have been doing a lot of searching and reading, but haven't found what I need. I would like to store values at a specific EEPROM address and to have an initial value. I know how to declare a varible that will compile to be programmed in the EEPROM starting at address 0.... But I want to spec...AVR (AT90S2313) EEPROM

Cypress FX2 EEPROM image won't run
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LeftSpin - 7 years ago
Cypress technical support has been really horrible, I hope someone here can help. I have a program for the FX2LP part. It runs fine when loaded with the Keil debug monitor, but does not run when loaded via CyConsole, or loaded into EEPROM. For the EEPROM, I'm using this command line: h...Cypress FX2 EEPROM image won't run

ATMega128 -- Difference between flash/eeprom
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Started by Ben Nguyen 9 years ago
Im trying to learn microprocessors, and Im a bit confused about flash vs eeprom. 1. Does my program that I download (via ISP ribbon cable) go into the EEPROM or the FLASH? 2. Can my user program use the EEPROM at run-time or must it be programmed ahead of time? 3. How does a bootloader ...ATMega128 -- Difference between flash/eeprom

AVR EEPROM writing
+1

Started by Unknown 8 years ago
Hi, I have a problem when using gcc-avr to write internal eeprom. I used library calls eeprom_write_word, eeprom_write_byte, eeprom_write_block to write the content. However, I found that when I reset the device by powering off and on again, the eeprom reading is refill to be all 0xff. Have I...AVR EEPROM writing

Example code in C for R/W data to EEPROM
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Started by comus 8 years ago
Hello all, i'm trying to write data into the EEPROM of the PIC 16f877A. I use the CCS-Compler Version 3.219 and an 16f877a with 368kb memory. as i want to use the eeprom to store static data i want write into and read from the eeprom. i used the "internal_eeprom.h" from ccs but w...Example code in C for R/W data to EEPROM

24C02 and 24C64
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Rohan - 6 years ago
Hi All, I have a routine for 24c02 which works very well. Now on the same PCB I mounted a 24c64 in place of 24c02 EEPROM. The old Read/Write routine didn't work on this. I am unable to find what could be the possible problem. What are the changes which have to be made when migrating a code ...24C02 and 24C64

Strange EEPROM related issue
+2

cerr - 1 year ago
Hi,=20 We have a fully functional system but saw twice so far (in 100+ samples) th= at the values in the EEPROM sometimes seem to be messed up. We suspect that= this is happening after powering on & powering off the system a few times = repeatedly but have been unable to reproduce the iss...Strange EEPROM related issue

PIC EEPROM EEIF flag polarity
0

Started by Unknown 7 years ago
Just wondering if someone could suggest a workaround for this snippet of pseudo code: if ( eeif == 1 ) { eeif = 0 // write eeprom } This piece of code (written in assembly) goes into the main loop of my program and allows the main loop to continue executing while the EEPROM takes...PIC EEPROM EEIF flag polarity

eeprom problems
-1

leilei - 4 years ago
Hi, is there any documents instruct how to read data from eeprom, like 93c46? I have 93c46's datasheet and source code from linux rtl8139 driver, but I still can not understand the detail. ...eeprom problems

SPI-EEPROM read problem
0

techie.embedded@gmail.com - 6 years ago
hello members I'm looking for some sample codes that interface TMS320F2812 with a SPI-EEPROM. The EEPROM I'm using is from Microchip and has a "1024 x 8-bit organization " and "16 byte page " I'm using some sample codes from TI themselves that actually implement the...SPI-EEPROM read problem

Reading EEPROM data, ATMEGA16, with imagecraft c-compiler
0

Started by fabrizio 9 years ago
Hei all, The intension is to read out a table located in EEPROM using the imagecraft C-compiler version 6.31A Definition in C --------------- #pragma data:eeprom char Output_Ports_Table[] = { 0x38, 0x02}; #pragma data:data .. .. In the program i write following code ... ... ...Reading EEPROM data, ATMEGA16, with imagecraft c-compiler

refreshing RAM from EPROM
0

Started by GG 9 years ago
I'm working on a project where they implemented a data store in EEPROM and a copy of it in RAM. The RAM copy is updated all the time and a low priority task writes it back to EEPROM. There is also a task that eery once in a while copies back from EEPROM to it's RAM shadow. I can't understand ...refreshing RAM from EPROM

Read EEPROM Memory on a mc9s12dg256 from Motorola
0

Started by Unknown 8 years ago
Hi ! I have to write an EEPROM driver for an mc9s12dg256 from Motorola. Everything is fine, but i cant find a command ro read from the eeprom memory. There are commands for Writing and erasing, but no Command for reading the memory. The Documentation from Motorola is real bad. Please help ! ...Read EEPROM Memory on a mc9s12dg256 from Motorola

EEPROM cell failures
0

Started by antares 9 years ago
Hello, does anybody know when an EEPROM cell failure caused by too many writings is detect? when I write a value and immediately after the writng I read it or after some time? thank you ...EEPROM cell failures

MPC8260 - I2C - single channel 1-wire master (DS2482) - 1 wire EEPROM (DS2433)
0

Started by Unknown 8 years ago
Hi, I'm writing an I2C driver for the MPC8260 that needs to read/write to a 1-wire EEPROM via a single channel 1-wire master. Since I'm new to the embedded world, I was wondering, if I want to send a READ ROM command to the 1 wire EEPROM, how must I go about doing that via software? How mus...MPC8260 -  I2C - single channel 1-wire master  (DS2482) - 1 wire EEPROM (DS2433)

i2c eeprom.c driver supports 2 address bytes?
0

Started by Unknown 6 years ago
I have a i2c eeprom device (Microchip 24LC65) that has 2 bytes for the device address (this is the 2 bytes that come right after the control byte). The eeprom.c driver seems to handle devices that has only 1 byte for the device address. Has anyone configured the eeprom driver for devices that ne...i2c eeprom.c driver supports 2 address bytes?

Setting the RESET vector on a 68HC11A0
0

hjartar@googlemail.com - 6 years ago
Hello all, I am trying to "reverse engineer" some older 68HC11 based equipment. I got a hold of some nice circuit boards with general purpose I/O and since I liked working with 68HC11's some 10 years back I got nostalgic. Only thing is that these are 68HC11A0FN's and therefore witho...Setting the RESET vector on a 68HC11A0

parallel eeproms and 8051
0

Started by funkymunky 8 years ago
Hi.. Im new to embedded systems, iv started with the 89c51 uC. Ive never used a parallel eeprom with the 89c51, thought iv used a serial one with the i2c protocol (and had a tough time in getting the thing to work, using sdcc :-( ). My question is..can only a parallel eeprom be used to exte...parallel eeproms and 8051

question on ARM comparing to AVR
0

cutemonster - 7 years ago
I have experience developing 8051 but I'm very new to ARM comparing to AVR. My question is how ARM save data since it doesn't have built in eeprom like AVR? I checked many ARM eval board but they all don't have external eeprom. I found a ARM board that completely suit my needs but it doesn't ...question on ARM comparing to AVR

CY7C68013 remove EEPROM
+1

Started by ewaite 8 years ago
Is there an easy software way to remove the vid/pid from the EEPROM and ge back to the initial Cypress one? Thanks Eric This message was sent using the comp.arch.embedded web interface o www.EmbeddedRelated.com ...CY7C68013 remove EEPROM

custom VID/PID help
+1

milappatel - 4 years ago
can anybody help me...? I hv 1 FT232BM chip and EEprom 93lc46. I am configuring my EEPROM using Eprog 3.0 software. In that I do change with my own VID and PID both and downloading it to EEPROM. and change the FTdibus.inf / Ftdiport.inf file with both VID and PID. but the problem is everyt...custom VID/PID help

Xicor X28HC256 EEPROM
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Started by Karl-Heinz 7 years ago
Hi, can anybody tell me where to find more internal information about the Xicor X28HC256 EEPROM than in the normal product data sheet? I'm especially interested in the page write operation. Is there an internal RAM in this EEPROM which stores the incoming data until the page write operation s...Xicor X28HC256 EEPROM

What is preferable for storing parameters FLASH or on-chip EEPROM ?
0

Started by yossi_sr 8 years ago
Hi All, Where it is preferable to store log/history parameters: in FLASH or in on-chip EEPROM ? I am using AT89C51ED2 8-bit MCU from Atmel. It has 2k EEPROM on-chip and 64kB Flash. EEPROM programming features: 1) On-chip 2048 Bytes EEPROM. 2) Supports only Byte programming ( no page program...What is preferable for storing parameters FLASH or on-chip EEPROM ?

Please give solution there is problem while interfacing AT25010A(serial EEPROM) with LPC 2103
-2

penchaljammula - 4 years ago
Helloo, I'm interfacing LPC2103(SPI0) with Serial EEPROM AT25010A to write data in to the EEPROM I have to sent 2 COmmands WREN(0x06),WRITE(0x02),Address(Let 0x00) and data(let 0x41) i'm using Keil debugger. While i'm writing S0SPDR register(with out interfacing AT 25010A) with these commands ...Please give solution there is problem while interfacing AT25010A(serial EEPROM) with LPC 2103

EEPROM guarantees after power loss during a write
0

John Devereux - 5 years ago
Hi, I am wondering what guarantees are there for existing EEPROM data, after power is lost during a write operation? I am writing a datalogging routine that writes records to an EEPROM. It's an Atmel 24C1024, although the question is probably applicable to other devices too. This uses "...EEPROM guarantees after power loss during a write

6802 - RS232
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Started by Unknown 7 years ago
hi everyone, I am working on a project which has a 6802 processor and standard ram and eeprom (not decided which bands yet). I wonder If I can write sofware for 6802 in PC and can send it with rs232 port to eeprom. ...6802 - RS232

Cypress EZ-USB FX2 firmware downloading
-1

galapogos - 5 years ago
Hi, I have a Cypress EZ-USB FX2 USB mass storage device. AFAIK firmware is only allowed to be downloaded to either the external EEPROM or internal RAM when the device either 1) Does not have an EEPROM, or 2) Has an empty EEPROM without any existing firmware When this happens, the host PC w...Cypress EZ-USB FX2 firmware downloading

Serial Flash vs Serial EEPROM ( sorry of you see the message twice)
+3

elil - 2 years ago
Dear, I'd like to understand why ALL Serial Flash chips always come with SPI vs Serial EEPROM chips that always come with I2C ? Why not vice versa for example? For my current project I'd like to add a small external memory, let's say 16 kBytes, as a backup for some case. Writing to EEPROM is ...Serial Flash vs Serial EEPROM ( sorry of you see the message twice)

Sistema antimanomissione e Cancellazione Eeprom
0

Started by .::[ IchiGeki ]::. 9 years ago
Salve, ho la necessità di realizzare un piccolo circuito con una eeprom che dovrebbe essere utilizzato come sistema antimanomissione. In pratica verrebbe collegato ad un miniPC inserito all'interno di un contenitore metallico che se aperto dovrebbe far scattare un interruttore e canc...Sistema antimanomissione e Cancellazione Eeprom

Anyone seen ATMega8515 lose eeprom data?
0

Started by Mike Harrison 9 years ago
A customer of mine recently changed from using AT90S8515 to ATMega8515 as the former is obsolete. We've had a couple of units in the field lose eeprom data - we're still waiting to get them back to look further but has anyone else seen anything like this ? ...Anyone seen ATMega8515 lose eeprom data?

Why Serial Flash has SPI, but Serial EEPROM - I2C ?
-1

elil - 2 years ago
Dear, I'd like to understand why ALL Serial Flash chips always come with SPI vs Serial EEPROM chips that always come with I2C ? Why not vice versa for example? For my current project I'd like to add a small external memory, let's say 16 kBytes, as a backup for some case. Writing to EEPROM is ...Why Serial Flash has SPI, but Serial EEPROM - I2C  ?

Programmer for AT24C64
0

Started by James254 9 years ago
Hi All, I support a product that's been manufactured with a bug in the flash memory of the microcontroller. The factory has come up with a solution and the design allows the update to be loaded via the products RS232 connector, so this part is simple. When the update is done I need to go in...Programmer for AT24C64

FPGA configration Data/Firmware
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Started by Unknown 8 years ago
Hi all I have no idea regarding low level hardware. I should firgure out something about ALTERA ACEX. Question is like following. 1.Are the FPGA configuration data and the firmware different? 2.How can I extract FPGA configuration data from ALTERA ACEX to my PC? 3.How can I extract firmwar...FPGA configration Data/Firmware
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