Questions tagged [eprom]
Erasable Programmable Read-Only Memory, which is a type of non-volatile memory that can be programmed by an electronic device and erased by exposure to ultraviolet light.
25 questions
3 votes
1 answer
406 views
What are the methods of transferring code from one MCU to another?
I have two identical PCBs that include the same MCU MC68705R3CP. Unfortunately, one of them has an output pin PB4 configured as Darlington drive output that has a high output regardless of the normal ...
- 457
0 votes
0 answers
89 views
how to determine what chip wire allows BIOS flashing?
how to determine what chip wire/leg allows BIOS flashing? I want to modify my MOBO to deny BIOS flashing. I only want it allowed when I really need to write on it. So, I need to know: if it is ...
- 1
1 vote
3 answers
376 views
Recognizing an erasable EPROM from a non-erasable one
I'm a Software Engineer looking at some datasheets for electronic components, and I've come across an inconsistency that I can't make sense of. I'm looking at PROMs, specifically EPROMs, my thought ...
- 113
5 votes
1 answer
640 views
EPROM data retention lifetime? Older instruments possibly due to fail?
I have EXPENSIVE old HP instruments that are from the 1980s that work great and are certainly very good instruments, completely usable in the home lab. Each has between 4 and 12 of the old UV type ...
- 51
0 votes
1 answer
701 views
FE Exam Question
Can anyone answer the question below? I have links to pictures of the question and answer. I don't understand the answer provided by the book. Why does it say in the answer, "The EPROM will ...
- 1
4 votes
2 answers
909 views
How to generate +5 V and -9 V voltages to read an Intel 1702A EPROM via Arduino?
I have some simple experience with TTL logic and Arduino, but I'm only a hobbyist and am bit stymied by my current project, which is attempting to read the data from an old Intel 1702A EPROM. The ...
- 2,163
1 vote
3 answers
2k views
Erasing and Reprogramming old EPROMs
One of my customers brought in several old EPROMs that he wishes to be re-programmed with the current firmware their system is using. My usual way of dealing with this is to place the EPROMs in the ...
- 24.6k
0 votes
1 answer
81 views
Does providing a noisy Vpp for a short period of time affect programming an EPROM?
I have been designing a complex(from my perspective) EPROM Programmer with an ARM-based STM32f103C MCU -actually it's a bluepill board- , I already programmed my EPROM before by hand manually and even ...
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