Source: https://commons.wikimedia.org/wiki/File:ESP32-Dieshot.jpg
It’s interesting how they are able to fit some much in a small space considering most of it appears to be memory.
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What are the octagons?
Inductors! They are being used for the RF stuffs (and maybe some clock PLLs).
Had no idea you could put inductors ON the die, but in hindsight, I guess there’s no reason why not.
~8.5mm^2 of pure magic as far as I’m concerned.
Most of it appears to be an upper metal layer. You can’t tell that that’s memory from this view.
Interesting. I guess I assumed it was memory given how consistent it was. Thanks for clarifying.
A dude who took a similar picture also has some more pics where they removed the top layer of the RF circuit allowing you to look inside
https://electronupdate.blogspot.com/2018/08/espressif-esp32-teardown.html?m=1