Casio-F-91W die-shot
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Casio-F-91W die-shot
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Re: Casio-F-91W die-shot
#2Dumb question: is it legal to share a die shot like this one? What does copyright law say about this?
I mean, yes, the author took the photo himself but what about the underlying material? Can I share a photo of an entire book? Do I own the copyright to a photo of a painting?
Re: Casio-F-91W die-shot
#3Dumb question: is it legal to share a die shot like this one? What does copyright law say about this? I mean, yes, the author took the photo himself but what about the underlying material? Can I share a photo of an entire book? Do I own the copyright to a photo of a painting?
why not? you are free to disassemble your computer and take photo of motherboard or whatever hardware you have, I don't see how is taking photo of die different
you can have copyright to your own photo, but not to pictured design
Re: Casio-F-91W die-shot
#4Dumb question: is it legal to share a die shot like this one? What does copyright law say about this? I mean, yes, the author took the photo himself but what about the underlying material? Can I share a photo of an entire book? Do I own the copyright to a photo of a painting?
why not? you are free to disassemble your computer and take photo of motherboard or whatever hardware you have, I don't see how is taking photo of die different you can have copyright to your own photo, but not to pictured design
Well a die design, just like code, is definitely some form of intellectual property and covered by copyright law. So I think a more fair comparison would be a photo of an entire book.
Re: Casio-F-91W die-shot
#5Dumb question: is it legal to share a die shot like this one? What does copyright law say about this? I mean, yes, the author took the photo himself but what about the underlying material? Can I share a photo of an entire book? Do I own the copyright to a photo of a painting?
"Can I share a photo of an entire book?"
No is the short answer to that one.
Re: Casio-F-91W die-shot
#6Earlier quoted context omitted.
why not? you are free to disassemble your computer and take photo of motherboard or whatever hardware you have, I don't see how is taking photo of die different you can have copyright to your own photo, but not to pictured design
Well a die design, just like code, is definitely some form of intellectual property and covered by copyright law. So I think a more fair comparison would be a photo of an entire book.
It might be a problem if the photo was reverse engineered into a schematic, which would also imply much more detail, but in this case it's just a photo of something cool.
Re: Casio-F-91W die-shot
#7Dumb question: is it legal to share a die shot like this one? What does copyright law say about this? I mean, yes, the author took the photo himself but what about the underlying material? Can I share a photo of an entire book? Do I own the copyright to a photo of a painting?
In the US, semiconductor mask layouts are not eligible for copyright. Instead, the mask layout is protected under the Semiconductor Chip Protection Act of 1984. The Act grants rights similar to traditional copyright, but with a shorter period of protection and a more permissive framework for derivative works.
Re: Casio-F-91W die-shot
#8Earlier quoted context omitted.
why not? you are free to disassemble your computer and take photo of motherboard or whatever hardware you have, I don't see how is taking photo of die different you can have copyright to your own photo, but not to pictured design
Well a die design, just like code, is definitely some form of intellectual property and covered by copyright law. So I think a more fair comparison would be a photo of an entire book.
> Well a die design, just like code, is definitely some form of intellectual property and covered by copyright law.
you can consume a book just by looking at it. You can't "read" a die-shot as easily.
Re: Casio-F-91W die-shot
#9Seems like two large similar rectangular logic areas.... maybe one is state machine and one is display?
Or maybe one is clock/date and one is UI?
Re: Casio-F-91W die-shot
#10Seems like two large similar rectangular logic areas.... maybe one is state machine and one is display? Or maybe one is clock/date and one is UI?
I think it's one blob of standard-cell logic on the left with power routing through the middle. I don't think there is any visible partitioning into functionality in this logic. The large amount of analog circuitry in the right half is a bit of a puzzle. It looks like some large capacitors, maybe a charge pump for something?