flash memory vs EEPROM

Started by rashid husain in Piclist13 years ago 4 replies

Hi All, A very naive question. What is the different between flash memory and EEPROM? What do you install in flash memory and...

Hi All, A very naive question. What is the different between flash memory and EEPROM? What do you install in flash memory and EEPROM? As far as I know, flash for program code, and variable in EEPROM or RAM. tq.. hole


Writing to PIC16F626 EEPROM

Started by Sasha in Piclist10 years ago 2 replies

Dears, I need help on a code to write to the PIC16F628 EEPROM. I should write decimal '11' in the first two bytes of the EEPROM address. I...

Dears, I need help on a code to write to the PIC16F628 EEPROM. I should write decimal '11' in the first two bytes of the EEPROM address. I have tried a sample code but I need confirmation of the Interrupt controls EEIF and EEIE have and where to put them; main program or in the Interrupt Service Routine program. BSF STATUS,RP0 ;select bank1 MOVLW 0x00 ;EEPROM address MOVWF...


Erasing EEPROM through Code

Started by tallevi21 in Piclist14 years ago 1 reply

I am having a problem wiping the first 16 bytes of the EEPROM through my code. I ran it through the simulator, it WORKS fine. But...

I am having a problem wiping the first 16 bytes of the EEPROM through my code. I ran it through the simulator, it WORKS fine. But when I burn it to the PIC, it only erases the FIRST location of eeprom and that is all. So basically the proper registers are loaded with data, and th


Programming just eeprom?

Started by tadaosystems in Piclist14 years ago 1 reply

I have a circuit that times and operates a pneumatic device, and is adjustable via an led menu system. The settings are saved in ...

I have a circuit that times and operates a pneumatic device, and is adjustable via an led menu system. The settings are saved in eeprom. It is also set up with an in-circuit programmer. Is it possible to write data just to certain eeprom locations without re- writing the entire pr


18F252 Base Address - Data EEPROM

Started by tfitzhome in Piclist14 years ago 1 reply

What is the base address for the Data EEPROM on the 18F252. I'm trying to convert some code from a 16F873 and I have, in my...

What is the base address for the Data EEPROM on the 18F252. I'm trying to convert some code from a 16F873 and I have, in my assembly file, code to write, at programming time, some of the Data EEPROM values. On the 16F873, ORG 2100h puts you at the beginning of Data EEPROM.


Another 18F Data EEPROM Question

Started by Rick in Piclist13 years ago

Yes, it's me again. MC makes some cryptic statement about embedding data EEPROM data in the "hex file" by declaring it with a DE...

Yes, it's me again. MC makes some cryptic statement about embedding data EEPROM data in the "hex file" by declaring it with a DE directive with an ORG of 0xF00000. Does this mean that bytes declared from 0xF00000 through 0xF003FF get burned into EEPROM at 0x000 through 0x3FF respectively? And if so, why does MPASM insist


EEPROM programming

Started by pakigenius786 in Piclist14 years ago 1 reply

I have a question regarding the PIC18F2220 EEPROM programming. The generic is that u write physical data to the EEPROM: MOVLW...

I have a question regarding the PIC18F2220 EEPROM programming. The generic is that u write physical data to the EEPROM: MOVLW MOVWF EEDATA Instead of Data can I have a file register and label that data address as the file register? is it possible. i


mplab and eeprom data area

Started by el_gringo69uk in Piclist15 years ago 2 replies

I,m having a lot of fun on a 16F84 project of mine which relies on data stored in the eeprom memory. Question : how do I predefine...

I,m having a lot of fun on a 16F84 project of mine which relies on data stored in the eeprom memory. Question : how do I predefine whats stored in the eeprom area? That is, as part of the .asm file. Or does it need to be saved in a seperate file. I am using ICPROG to program my PIC,


EEPROM starting address

Started by R Ramesh in Piclist14 years ago 2 replies

Hi   I need to store the value in eeprom . I m using PIC 16f877 C Microchip . I dont know which is the starting address of...

Hi   I need to store the value in eeprom . I m using PIC 16f877 C Microchip . I dont know which is the starting address of eeprom .   i need to store the the time how long my machine run at the customer place .It is possible to store that much data can


eeprom write errors?

Started by Phil in Piclist13 years ago 21 replies

I'm using a 16F648A and am seeing some errors when writing data to eeprom. I put some verification code in my eewrite routine and...

I'm using a 16F648A and am seeing some errors when writing data to eeprom. I put some verification code in my eewrite routine and am frequently getting back something different from what I wrote. Usually, this happens once every 4-10 writes and appears to be somewhat random.


24LC00 Microchip EEPROM

Started by erf1779 in Piclist13 years ago 1 reply

I recently came across a number of these 24LC00 T/SN Microchip EEPROM's. Could anyone tell me if these have much use anymore, or...

I recently came across a number of these 24LC00 T/SN Microchip EEPROM's. Could anyone tell me if these have much use anymore, or are they only used in specific applications? I unfortunately don't have the time I would like to have to work with them. I appreciated any infor


Eeprom in 16F648A

Started by wantoniet in Piclist14 years ago 5 replies

Hi, I was working at my last project and found a problem so very interesting. My equipament used a 16f628 and i upgraded to...

Hi, I was working at my last project and found a problem so very interesting. My equipament used a 16f628 and i upgraded to 16f648a cause i required more flash memory. On step to write in internal eeprom, i realized that sometimes wrote right, sometimes not. After tw


Problems reading data Eeprom using Pic16F88

Started by izzy_w_2004 in Piclist13 years ago 1 reply

I have been trying to use the 'read data EEPROM' feature of the 16F88, but can't get it to work. I have used the sample...

I have been trying to use the 'read data EEPROM' feature of the 16F88, but can't get it to work. I have used the sample code from Microchip's datasheet. Attached is the (entire) ASM file that I am using. It should (I had hoped) store the value h'BB' in the regist


PIC EEPROM Data to PC

Started by Paul in Piclist12 years ago 3 replies

Hi. How would i go about transfering my EEPROM Data from the PIC to either a PC or Floppy/Memory Card? I am currently looking on the Net for...

Hi. How would i go about transfering my EEPROM Data from the PIC to either a PC or Floppy/Memory Card? I am currently looking on the Net for info, but just wondering if anyone has done this or have any information to help me? Cheers Paul


reading program from external EEPROM

Started by Michael Millikan in Piclist14 years ago 11 replies

Hi there, I assume that people have attempted to have a PIC execute code that it reads from an external EEPROM (when the PIC...

Hi there, I assume that people have attempted to have a PIC execute code that it reads from an external EEPROM (when the PIC itself doesn't have enough memory.) Does anyone have a good reference on how I might do this? I was thinking of loading an instruction from the


16F628 on-chip eeprom problem

Started by Vladimir M Skrbic in Piclist14 years ago 2 replies

Hello everyone, I'm new to the group and I'd like to ask a question. I've recently moved all my projects from 16F84 to 16F628...

Hello everyone, I'm new to the group and I'd like to ask a question. I've recently moved all my projects from 16F84 to 16F628 mcu's. Yesterday I've tried to write data to the internal (on-chip) eeprom of 16F628 using PicBasic Pro with little (or no ;) sucess. Would anyone care


PIC 18F452 and internal EEPROM - corrupted

Started by ffvi...@gmail.com in Piclist9 years ago

Hello, I'm new at group, i'm getting some problem with corrupted internal EEPROM on PIC18F452, i believe that it could be happening with some...

Hello, I'm new at group, i'm getting some problem with corrupted internal EEPROM on PIC18F452, i believe that it could be happening with some connection with electrical noise. is it the answer? what more could be happening? it's a C program and this just happened in the outside, here in the lab i'm not able to reproduce the problem. I have tried almost everything. Tks for the help! :-) ...


18F Data EEPROM "Refresh" Questions

Started by Rick in Piclist12 years ago 4 replies

I'm thinking about using the Data EEPROM in an 18F8620, and can't figure out what the datasheet is trying to say. I hope someone can...

I'm thinking about using the Data EEPROM in an 18F8620, and can't figure out what the datasheet is trying to say. I hope someone can clarify. Section 7.8 says, in part "Frequently changing values will typically be updated more often than specification D124. If this is not the case, an array refresh must be performed. For this reason, variables


Expanding EEPROM

Started by Paul_Lav in Piclist14 years ago 4 replies

Just wondering, is it possible to buy a IC to expand EEPROM memory to the pic? And what sort of I/O do they take to run? ...

Just wondering, is it possible to buy a IC to expand EEPROM memory to the pic? And what sort of I/O do they take to run?


Programming 16f872 data eeprom memory

Started by Chris in Piclist13 years ago 2 replies

Just checking to see if anyone knows of any problem with the microchip method of programming eeprom data (not program) bytes using ...

Just checking to see if anyone knows of any problem with the microchip method of programming eeprom data (not program) bytes using the method described in the 16f872 datasheet. I can't work out where the problem is, but my code crashes and freezes when I use their example. Wonder