They actually can be written to. Its name doesn't accurately describe it. PROM(Programmable ROM) came first, and it could only be written to once. EPROM(Erasable PROM) came after. It could be reprogrammed after being exposed to UV light to erase data. Then EEPROM(Electronically Erasable PROM) came out, where data could be erased electronically. Older EEPROMs were also slower to write/erase, so people often used them like they were read only. Today, they can be almost instantly written to, so the term "Read Only" is inaccurate.
Hi there, thanks for your question! An EEPROM memory cell typically includes a floating gate transistor. This floating gate is isolated electrically by an oxide layer. Data is stored by modifying the electrical charge on the floating gate. Applying an electric field forces electrons through the oxide layer onto the floating gate, which remains even after the power is removed, hence preserving the data stored. As for the transistor's operation, when no charge is present on the floating gate, the transistor allows current to pass through, representing a '1'. When the floating gate is charged, it blocks the current flow, representing a '0'. For a detailed explanation and diagrams illustrating the EEPROM register and transistor operation, the Getting Started with Serial EEPROMs guide (www.microchip.com/en-us/products/memory/serial-eeprom/getting-started) on Microchip's website is a great resource. It offers practical insights and a deeper dive into the technology, which might be exactly what you're looking for!
Hi there, thanks for reaching out with your question. EEPROM and RAM are not the same. EEPROM (Electrically Erasable Programmable Read-Only Memory) is non-volatile, meaning it retains data when power is turned off, ideal for infrequent writes and frequent reads. RAM (Random Access Memory) is volatile and requires power to maintain its data, used for high-speed read/write operations essential for system operations and running applications. They serve different purposes in computing and electronics, with EEPROM for long-term data storage and RAM for temporary data access during device operation. Hope this helps!
Pls I need answer to this.. Can i get the list of devices that make use of prom, eprom and eeprom.. Do we still use prom, eprom, eeprom in this generation? And where are they used?
@Isaiah - On the non-volatile memory timeline, with decades as the horizontal timestep axis, first came ROM, then the market pushed for PROM, then the market pushed for EPROM, then the market pushed for EEPROM (which then added FLASH). When we pitch business plans to our management we need to show a proper ROI to get funding for new designs. We haven’t tried to pitch a business plan at Microchip for ROM, or PROM, or EPROM for several decades now… the market just won’t cover our investment bet. But some companies with long running products (think 30 years) keep ordering our old PROM and EPROM products from many years ago. These PROM and EPROM orders come from military and industrial infrastructure companies. They do not share the exact applications. But we do notice that when their design teams finally redesign these systems they finally end-of-life their need for our PROM and EPROM parts and move to EEPROM or FLASH in the redesign.
Manufacturers of memory products will release products in standard densities, almost always in powers of 2: 1 Kb, 2 Kb, 4 Kb, 8 Kb, 16 Kb, …, 256 Kb, …, 4 Mb, ..., 16 Mb, … , 1 Gb, … So always look at your target manufacturer and your target memory type early in the design process to make sure the manufacturer will have a density (64 Kb, 1 Mb, etc.) that will be the right size for your system requirement.
Turned over my mother's postage scale to change the battery and BAM! "EEPROM" cover next to the battery cover. Slid that sucker off and saw a SPI EEPROM. Looked up and BAM! an old Pentium Processor with the markings 1980 sitting right next to the eeprom.
Thanks for making things more complicated for me :)
Lol
😂😂😂
😂😂😂
:D
If it's read only, how come it is programmable? Doesn't it mean things have to be written? I never understood this.
I think it means that only the CPU can read instructions from it and not write to it.
It is always programmable if it is PROM or EPROM or EEPROM.
@@yamasaer I don't understand what programmable means I guess. All I know is whatever is on that eeprom chip can never be changed, only red
Can you provide me solution for this error (avrdude: error: address 0x0410 out of range at line 65 of apm32u_eeprom.hex)
They actually can be written to. Its name doesn't accurately describe it. PROM(Programmable ROM) came first, and it could only be written to once. EPROM(Erasable PROM) came after. It could be reprogrammed after being exposed to UV light to erase data. Then EEPROM(Electronically Erasable PROM) came out, where data could be erased electronically. Older EEPROMs were also slower to write/erase, so people often used them like they were read only. Today, they can be almost instantly written to, so the term "Read Only" is inaccurate.
Sir I am getting some issue while uploading firmware in mega32u2.can you provide solutions
2:03 , can you explain how does the transistor is working? or any recommendations for the explanation on how EEPROM register works? thanks !
Hi there, thanks for your question! An EEPROM memory cell typically includes a floating gate transistor. This floating gate is isolated electrically by an oxide layer. Data is stored by modifying the electrical charge on the floating gate. Applying an electric field forces electrons through the oxide layer onto the floating gate, which remains even after the power is removed, hence preserving the data stored.
As for the transistor's operation, when no charge is present on the floating gate, the transistor allows current to pass through, representing a '1'. When the floating gate is charged, it blocks the current flow, representing a '0'.
For a detailed explanation and diagrams illustrating the EEPROM register and transistor operation, the Getting Started with Serial EEPROMs guide (www.microchip.com/en-us/products/memory/serial-eeprom/getting-started) on Microchip's website is a great resource. It offers practical insights and a deeper dive into the technology, which might be exactly what you're looking for!
@@MicrochipTechnology Thankyou so much for the detailed explanation!
Happy to help!
I see EEPROM on TV boards and DVD player boards. What else can be done by EEPROM?
Is EEPROM and RAM the same?
Hi there, thanks for reaching out with your question. EEPROM and RAM are not the same. EEPROM (Electrically Erasable Programmable Read-Only Memory) is non-volatile, meaning it retains data when power is turned off, ideal for infrequent writes and frequent reads. RAM (Random Access Memory) is volatile and requires power to maintain its data, used for high-speed read/write operations essential for system operations and running applications. They serve different purposes in computing and electronics, with EEPROM for long-term data storage and RAM for temporary data access during device operation. Hope this helps!
@@MicrochipTechnology Huge thanks 😊
No problem! Happy to help.
Pls I need answer to this..
Can i get the list of devices that make use of prom, eprom and eeprom..
Do we still use prom, eprom, eeprom in this generation? And where are they used?
@Isaiah - On the non-volatile memory timeline, with decades as the horizontal timestep axis, first came ROM, then the market pushed for PROM, then the market pushed for EPROM, then the market pushed for EEPROM (which then added FLASH). When we pitch business plans to our management we need to show a proper ROI to get funding for new designs. We haven’t tried to pitch a business plan at Microchip for ROM, or PROM, or EPROM for several decades now… the market just won’t cover our investment bet. But some companies with long running products (think 30 years) keep ordering our old PROM and EPROM products from many years ago. These PROM and EPROM orders come from military and industrial infrastructure companies. They do not share the exact applications. But we do notice that when their design teams finally redesign these systems they finally end-of-life their need for our PROM and EPROM parts and move to EEPROM or FLASH in the redesign.
@@MicrochipTechnology thanks
@@Hackeriah You're very welcome!
I came here from looking how to program Automotive keys. Kept seeing eeprom in the descriptions. Looks like transponder keys use eeprom
Hello sir , my treadmill's 93c46wp ic damaged , ic is not available here what I do ? Please help
Kindly visit support.microchip.com for assistance. Thank you.
What is meant by "product densities"?
Manufacturers of memory products will release products in standard densities, almost always in powers of 2: 1 Kb, 2 Kb, 4 Kb, 8 Kb, 16 Kb, …, 256 Kb, …, 4 Mb, ..., 16 Mb, … , 1 Gb, … So always look at your target manufacturer and your target memory type early in the design process to make sure the manufacturer will have a density (64 Kb, 1 Mb, etc.) that will be the right size for your system requirement.
No one is perfect on RUclips for techonology explanation
Great Video
Turned over my mother's postage scale to change the battery and BAM! "EEPROM" cover next to the battery cover. Slid that sucker off and saw a SPI EEPROM. Looked up and BAM! an old Pentium Processor with the markings 1980 sitting right next to the eeprom.
Vertigo Studios ??
the start looks like a VOUGHT comercial
You are awesome
Angelo Lodge
Its Only 16bit/2kb not so much
It depends on the usability you want.
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